(;FF[4]
CA[UTF-8]
GM[1]
GN[KataGo 7 komi self-play - game 110]
PC[https://online-go.com/review/1009972]
PB[KataGo]
PW[KataGo]
BR[9p]
WR[9p]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[7]
RU[NZ]

;B[qd]
;W[dp]
;B[cd]
;W[pq]
;B[fd]TR[cd]TR[qd]SQ[pq]C[We have mukai komoku versus a sort of orthodox shape.
Generally, the idea with mukai komoku is that the side that they're both facing kind of has high value, but is kind of difficult for white to approach.
The traditional theory is, don't let black enclose two corners. I don't think it matters a huge amount here.

[All comments on this game by streetplay (AGA 5d), except bracketed comments by Maharani.\]]
;W[oc]TR[pq]C[White playing Q3 means that if black doesn't approach it, if white encloses the upper right, it limits black's development from that corner. That's usually how we think about this.]
;B[pe]C[Kosumi is the most common response to play solid.]
;W[lc]C[The two-space extension is also solid.
Now I'd expect black to approach the bottom right.]
(;B[po]C[All is good. High means that black's trying to make a bigger framework. This makes sense.]
;W[qo]
;B[qn]
;W[qp]
;B[pn]
;W[nq]C[White plays low. I assume black will extend.]
;B[pj]SQ[hc]TR[cd]TR[fd]TR[qd]MA[qh]C[One of the benefits of playing the two-space high enclosure in a mukai komoku setup is that H17 is not a very attractive move for white.
My KataGo with lower playouts recommends R12 for white.]
(;W[fq]TR[cd]TR[fd]C[I've seen in a lot of games where F3 is played, with some sort of black influence facing the left side, the basic idea is that it's very hard for black to play an ideal move.
You do see this kind of parallel enclosure idea from time to time if you study with AI a lot.]
(;B[jc]TR[lc]TR[oc]C[Black decides to pincer the top side.
It's not necessary for white to defend the P17 stones; I've actually studied this a little bit.
The idea for white now would be more breaking up the board if she's the player with the stronger formations.]
(;W[hc]TR[lc]TR[oc]C[White invades directly; also totally fine.
If I'm thinking about, "Who's the strong player, who's the fast player here?" White has very stable formations for the most part; the P17 stones are a little weak, but pretty stable. Black is not making a huge framework, but is covering more space; all of his formations are a little more spread out.
So it makes sense that white would rather invade here.]
(;B[cn]C[Black approaches; totally reasonable.]
;W[he]SQ[gc]TR[je]C[White jumps.
Usually, in this shape, if the upper right was interesting, black would jump at K15; but if it's not, black would kick at G17.]
(;B[gc]SQ[gb]SQ[hb]TR[jc]MA[lc]C[Black can play more lightly with this kick, or potentially move out from K17 in a different way.
If white wants sente, she usually hanes at G18. If she wants to continue locally, probably because of the M17 stone, she would play straight down at H18.]
;W[hb]SQ[jb]TR[lc]C[This indirectly supports M17 with K18.]
;B[cp]SQ[hb]SQ[gc]SQ[jc]SQ[he]TR[cn]MA[fq]MA[nq]C[Black plays away.
Black's sort of saying, "I got two moves here in exchange for an okay sequence on the top side." I don't really like playing those kinds of exchanges, 'cause I don't feel like black has fixed things very well.
I don't like that the top side shape is there, but I can appreciate that black getting moves in the bottom left is very big; particularly because F3 and O3 are both low.]
;W[cq]
;B[bq]
;W[co]
;B[bp]
;W[do]
;B[bo]
(;W[qh]SQ[pc]SQ[nd]SQ[pg]SQ[oh]MA[rj]TR[dn]C[White doesn't push at D6. She tries to get more value by invading the right side.
This makes sense. White got stronger on the top and uses that strength to invade.
If I'm black, Q13 comes to mind, or P12; kind of seal white in. Sealing doesn't feel great, though, 'cause white is pretty strong on the top. The Q17 kick is maybe possible. Tenuki is probably what I would play. Leaning at O16 also makes sense.
Black really doesn't want to play at S10.]
(;B[rj]C[Black does go down.
To me, it feels very slow to defend like this, although apparently it loses very little and is good enough. It's hard for me to play.
It does take away white's base.]
(;W[oi]TR[oh]C[White plays here.
Why is this move better than jumping at P12? My intuition is that black would get strong on the top, so white wants to move away from there.]
(;B[nd]SQ[nc]TR[oc]TR[ne]MA[nf]SQ[oh]TR[qh]SQ[ni]TR[oi]SQ[oj]C[Black leans, preventing white's O15 press.
White could defend her R12 shape; because now, if black pushes, white doesn't have O15. She'd have to extend or something, and then black has the P12 cut.
Or white could counter-peep at O14.
Even if black cuts at O17, P17 is not completely dead.]
;W[nc]C[But white does answer.]
;B[md]C[Black extends.]
;W[ld]C[White bumps.]
;B[mf]C[Black jumps.]
(;W[og]SQ[qf]TR[ng]C[I like the O13 shape better; it's kind of nicer. This one's a little flat.
I think you can only really play this if you see R14.]
(;B[pi]C[Black pushes here.]
(;W[nf]TR[md]TR[nd]SQ[od]SQ[ne]SQ[oe]TR[mf]MA[nh]MA[oh]C[This move is so, so cool. It hits, like, three different vital points at once.
It breaks black's bamboo, threatens the P16 push and cut, and defends the P12 wedge.
AI is really good at having this kind of haengma; it's just hard to optimize as a human sometimes.
I tend to like this game as white. The board's kind of broken up; the territories are small; black's top left shape seems awkward.]
(;B[mg]TR[md]TR[nd]TR[mf]MA[nf]MA[og]SQ[mh]TR[nh]TR[oh]MA[oi]C[Black extends, threatening the wedge, so N13 becomes a peep.
White needs to make shape somehow. N12 attach is sort of a shape, P12 connect is sort of a shape; none of these are great options. So what does white do here?
Black's stones can be cut later; so as long as white saves the head of her group, which is kind of weak, it'll be good for white.]
;W[ph]TR[nh]C[White just defends, which means the peep is coming.]
;B[nh]C[White has to connect.]
;W[oh]SQ[me]SQ[ne]TR[nf]TR[mg]C[Does black net?
After the marked exchange, because of the two cuts here, this is okay for white. She can fight this.]
;B[od]C[Black has to go back.]
;W[le]C[White extends.]
(;B[mc]C[Black pushes.]
;W[mb]
;B[nb]SQ[lb]TR[ob]C[Black cuts.
Black is making these exchanges to say, "Hey, white, do you wanna give me that aji, or do you wanna back off?"]
(;W[lb]C[White backs off.]
;B[ob]TR[me]C[White lets black make the big corner.
And it's not like black won't ever connect at N15; but the upper right is now alive for black, so the value of white cutting at N15 is reduced. That's why black's happy with this. Black didn't have to spend the N15 move yet, and added P18 to take points.
White, on the other hand, is also not unhappy because, since she can cut at N15, her group on the right is stronger than it was before.]
;W[me]TR[ne]MA[nh]MA[oh]SQ[oj]C[White does cut.
Black now says, "Okay, I don't want to spend a move at O15 to help you surround me, 'cause I can't win the fight right now." Because the head at P10 is weak for black since he's peeped at O12.]
;B[dn]MA[hb]MA[lb]MA[mb]SQ[gc]MA[lc]SQ[cd]SQ[fd]MA[ld]MA[le]MA[me]TR[co]TR[do]TR[dp]TR[cq]TR[fq]C[So black plays the big move. This is the head of white's group and makes black very strong.
Whenever there's a time that the tension kind of falls off and both sides can play something big, then the idea is to figure out what is important. On this board, the left side is the big potential for black.
White's D4 group is not alive. White could add a move, but doesn't have to. If I'm white, I'm thinking black's upper left is a little thin because I got the descent, and my top side group got much stronger. So threatening the upper left seems like a way to break the left side. I don't think white has to defend the bottom left, yet.]
(;W[en]C[Oh, white hanes, really?
Okay, so the AI says, these areas of tension between the heads of groups, and the strength of groups, are more important. I can kind of see that.]
(;B[op]TR[np]TR[oq]C[Black peeps.
This is often a good probe. Black wants white to choose between O4 and P3.]
(;W[np]C[White plays this way to expand the bottom side.]
;B[oq]C[Black pushes. This is not necessary, but usually it's sente.]
(;W[or]
(;B[em]C[Black comes back and hanes, okay.]
;W[fn]C[White extends.]
;B[fm]C[Black pushes. White probably extends here because her liberties are short.]
(;W[gn]TR[gf]TR[di]TR[gm]C[And now the question is, does black push again? Does he play something on the left? Maybe G14 is big, but it might be very thin.]
;B[gm]C[Nope, just push again.]
;W[hn]
(;B[nr]C[Black does cut.]
;W[pr]
;B[hm]C[Black pushes again.]
(;W[jn]TR[im]C[White jumps; interesting. I think I agree with it.
Sometimes people ask me, "When do you jump and when do you extend?" Usually you jump if you want black to play J7 next.]
(;B[fp]C[Black plays this. What?! Excuse me? What is this? This is a pretty wild move.
I don't know. It's a good vital point, maybe a good probe; black deciding which way to go.

-- chat --
Baekh0: move 69 is insane to me
]
(;W[gq]TR[in]C[White extends.
This is the safest option, but even this seems to leave the wedge issue.]
(;B[in]TR[gq]C[After white added a move, black's saying, "Ha! You became stronger, so I'm gonna use the wedge to make you over-concentrated."]
;W[io]
;B[im]
(;W[cg]TR[dq]TR[mr]C[White plays away. Playing away on the left makes the most sense.
White has weaknesses on the bottom, but nothing is bad enough that anything's gonna die; and white has enough stones there to have kind of lowered the value of the space enough that she could play away.
This is obviously the biggest side, 'cause black has this giant wall. White wants to play close to the corner because it is not alive.]
(;B[jo]C[Black says, "there's no good move for me on the left side", so he cuts here.]
;W[jp]C[White ataris.]
;B[ko]C[Black extends.]
;W[kp]C[White keeps pushing to fix it all.]
;B[lo]
;W[lp]
;B[no]TR[mo]C[Black comes back; and white wedges, I assume, because it's double sente, almost.]
;W[mo]
;B[mn]
;W[mp]
;B[ho]TR[eo]C[Black cuts, activating the E5 cut for later.]
;W[ip]
;B[eq]C[Black does it right away.
One benefit for black in this sequence is that the cut at D7 is kind of fixed since white's D4 stones can die.
White fixed the bottom side and has sente, so she's not unhappy with that.
It's so funny that B15 is a move for white.]
(;W[ee]C[White says, "Ha! I can't do anything, but I did get the bottom side, and you still have issues on the outside." So she plays away.
If you're a DDK or weak SDK, you might be, like, "How can white just leave all this stuff hanging?" But the main black group is alive and the main white group is alive, so that is all just endgame; it's not very important.
The important things right now are attack and defence of the top left groups, and at SOME point, as the center gets filled, the O15 cut becoming relevant, maybe. I know white has maybe one and a half eyes on the right, but at SOME point, the cut will be relevant.
E15 is no immediate threat for black. White can't really play it unless she sees the B15 slide.]
(;B[df]TR[gc]TR[fd]C[Black cuts immediately.
Black's sort of saying, "If you take the F16 stones and I take the left, that's good enough". Which, I agree.
So white will probably defend the left side...]
(;W[be]C[... somehow, hahaha. This slide is really cool, I wouldn't have thought of that. I don't know what I would have done, personally.]
(;B[dc]TR[fd]C[This is cool; it defends everything, huh? It fixes the connection.]
(;W[de]TR[ce]C[White does push, this way. I assume black cuts.]
;B[ce]
;W[cf]C[Black doesn't really know what the best shape is here.]
(;B[er]TR[dc]MA[mj]MA[oj]SQ[en]SQ[fn]SQ[gn]SQ[hn]MA[ln]SQ[co]SQ[do]SQ[dp]SQ[cq]C[Black goes down, okay. It's true black's top left corner is independently alive; we kind of resolved the place.
Black can only play away since white doesn't have a move on the top left that fixes everything.
The claim from black is, like, "Maybe white profited a little bit locally on the left by breaking the side and reducing it, but her shape is not clean." And black did settle the top left corner issue, so that's a form of profit. Black got D17. So the sente of coming to E2 is offsetting the value loss on the left side, is the claim.
White, on the other hand, probably is gonna play away, 'cause the D4 group is very much unimportant now that black added another move. I don't know what's biggest. Does white want to clean up the left side? Playing a move around N10 is also big. M6 is, like, endgame; it's not urgent, but it's still pretty big. I would maybe think about pushing at P10?]
(;W[bd]C[White pushes in the corner once. I see; we want to fix the shape here.]
;B[bc]
;W[fb]TR[de]TR[ee]SQ[gf]C[White's saying, "Ha! Let me bully you first."
Two things can happen. One is, if black does something, white's outside weaknesses can get fixed. Or, if white gets enough profit from one side, she could say, "The E15 stones aren't important. They become lighter after black has defended the corner. I don't need to protect the cutting around G14; I'll just defend the left, might be more important."]
(;B[mj]C[Black says, "I don't want to defend; also, you have your own issue."
Is the upper left alive?
When you have this kind of fight happening on the right, neither side wants to play the move that cuts or connects because you spend a whole move to do it, and it doesn't get you points.]
(;W[oj]TR[ne]C[Even if white does come back to O15, she wants to profit first. So she pushes.]
;B[pk]C[Black answers.]
;W[mi]C[White probes the cut.]
(;B[gb]C[Since black has no good move, he comes back. We did see that this was very big.
Black's sort of saying, "If I get strong and resolve this, white has to fix the outside weakness."]
;W[ga]
;B[eb]
;W[fc]
;B[gd]C[Everything is sente.]
;W[ed]
;B[ec]
;W[fa]C[Oof... black's gonna squeeze?]
;B[kf]TR[li]TR[ni]C[Black plays here, which activates the O11 cut, potentially, and then N11 hane.]
;W[ne]C[White defends.]
;B[cb]C[Black lives, so everyone's kind of happy.]
(;W[ff]C[White defends, and we're kind of in an endgame. The score is basically even. Really crazy game, in a subtle way.
For black now, the left side is the biggest, but there's a tension in the middle right, which I want to resolve.]
;B[di]TR[dg]C[Black peeps, saying he's gonna play D13 next.]
;W[ci]C[White attaches.]
(;B[cj]TR[ch]TR[bi]TR[dj]C[Black hanes.
White descend, empty triangle, or cut are the local moves. My guess is descend.]
;W[bi]C[We're kind of at the stage where points are more important.
When I teach, I'm always telling people points are not important. Yeah, you don't worry about points until you're at move 119, 120; that's when you start caring about points.
And even now, there's a tension in the middle right that needs to be resolved first.]
;B[dj]C[Black defends.]
;W[dh]C[White defends.
I assume black will go back to the middle right.]
;B[eh]C[Black hanes first.]
;W[eg]TR[eh]C[Now back to the middle right?
I don't even like this exchange for black, but it's fine, I guess.]
(;B[ig]TR[jc]SQ[fh]C[Okay, this way. More active; aims at pulling K17 out; aims at F12. To be honest, I don't know what I would have played.]
(;W[go]TR[ln]SQ[eo]C[White captures to fix. It's really endgame-y.
I still think there's a bit of tension in the middle right. Obviously, M6 is hanging. The left side is open. And there's stuff in the top right corner. The bottom right corner is not that big. And obviously, there's a cut at E5.]
;B[ie]C[Black now plays this, so the order didn't matter.]
;W[hd]TR[ln]SQ[eo]C[Usually, in this endgame we think about sente and gote a little.
Everything for black is gote, except for the middle right tension, potentially. I guess black doesn't really want to settle the middle right until M6 is resolved, either. So those are kind of miai. E5 is much bigger than the left.]
(;B[eo]C[Black takes the big points.]
;W[ln]TR[eo]C[White takes the other big points. By capturing here, she resolves the middle right tension.
But black is happy. Selling M6 like this means that the middle right becomes less of a burden for him. It's kind of like he's reducing the maximum efficiency he can have, but he's also reducing the minimum efficiency he can have; so the variance is decreasing.]
;B[fh]TR[ln]C[Black extends, defending the center.
The middle right becomes not important after white captures at M6, because white has two ways into the space.]
;W[ki]C[White continues here.]
;B[ni]
;W[kk]
;B[gp]C[At a certain point in the early endgame, late middlegame, both sides play in the center to make it small, 'cause it's bigger than the other things; but not that big.]
;W[hp]C[Is this sente? I don't think so.]
;B[nj]C[Black cuts.]
;W[jl]TR[jn]TR[ln]C[White connects with the capture.]
;B[ok]C[Black turns. That's actually really big; I didn't see that.]
;W[bk]C[White jumps.
Which one do you think is bigger next, upper right or bottom right? I think upper right.]
;B[jd]C[Okay, oh, I forgot. This one's also huge. White's whole group needs to connect.]
;W[jb]C[White connects.]
(;B[mm]C[I see. I think the upper right and bottom right are kind of miai-ish, and then this is just biggest.]
;W[ll]
;B[bj]
;W[aj]
;B[ck]C[We're not even playing on the right side of the board.]
;W[fr]C[These are all bigger.]
;B[fs]
;W[gs]
;B[es]
;W[hq]
(;B[ib]C[This is just a sente reduction. I should remember that; that's a cool technique. Black wedges once.]
;W[ic]
;B[kb]
;W[ia]
;B[kc]
;W[ka]
(;B[rn]C[Oh! This one at this timing? Ah, interesting.]
;W[ro]TR[rn]C[Normally in this corner, black doesn't play S6.]
;B[bl]C[This atari is bigger than the upper right, I agree.]
(;W[re]
;B[rd]C[Black blocks.]
(;W[ii]C[In the meantime, the center's bigger.
Obviously, black has weakness issues; but the way I think about the center is, J11 is a 5-point reverse sente.]
(;B[ml]C[And in this case, black can't even make 5 points, which is why he is not defending that space.
Black defends here; this is huge. It's very cool to see this move. There's some sort of balance between the two, I guess.]
;W[gi]C[We play all the sente endgames.]
;B[gh]
;W[fj]
;B[ea]
;W[ha]
;B[gf]C[This is all just sente.]
;W[ge]TR[ei]C[At some point, I think black wants to get back to the top right. Black is pretty connected in the center; as long as he's connected enough that the E11 cut doesn't matter, he's fine.]
;B[rg]C[Black does come back.]
;W[qf]C[White plays here.]
;B[rh]C[Black connects.]
;W[qi]
;B[ri]
;W[sd]C[White plays the endgame.]
;B[sc]
;W[se]
;B[pf]C[Kikashi before defending.]
;W[qg]
(;B[qc]C[White's gonna play the biggest endgame. I don't know what it is. There's still something in the center. Maybe connecting at A9 is big?]
;W[ak]C[Yeah, connecting is big, okay. I think it's 6⅓ points for white. It's a good one to know; I should remember that.]
;B[al]
;W[ai]C[White has 3 points here.]
;B[gk]C[Black contests the center. This is gonna end up being 0 points for both, and white will erase something here, probably.]
;W[hh]
;B[hg]
;W[ke]TR[jf]C[This is big; it's 3-ish points. This is definitely sente because of the K14 wedge.]
;B[km]C[Black does this first. It is bigger because the center is not alive.]
;W[jm]
;B[lm]
;W[kn]
;B[if]C[Black defends.]
;W[fk]C[White plays here.]
;B[hj]C[Black peeps...]
;W[hi]
;B[ek]TR[dl]C[... and defends.
If white played E9, black would kind of have to answer at D8; so black E9 becomes at least 2 points reverse sente, is my feeling.]
;W[il]
;B[ij]C[This one? Okay.]
(;W[qj]C[White plays a sente...]
;B[qk]
;W[jj]C[... then defends.]
;B[fl]C[Black defends.]
;W[sn]C[This is 2 points with some aji on both sides.]
;B[sm]
;W[so]
;B[bf]
(;W[dd]TR[bf]C[Again, this is good habit: kikashi before defending. It's a 1-point sente now. Black for sure won't play away because he just cut; if white captures, black lost a move.]
;B[cc]
;W[bg]
;B[rf]C[Black threatens 3 stones and 1 point, so it's 7.]
;W[je]C[White threatens 9 points...]
;B[id]C[... so black connects...]
;W[qe]C[... before white defends. You see them playing very good endgame.]
;B[ad]C[Black ataris once.]
;W[af]C[There's no funny business in the corner, I think.]
(;B[sf]C[This is 2½-ish or maybe 3 points reverse sente.]
;W[lj]C[White defends here; also big.]
;B[jh]C[Black peeps.]
;W[ji]
(;B[mk]C[Black connects. This gains 1 point.]
;W[ae]
;B[ac]
;W[na]
;B[oa]
(;W[ik]
;B[gj]
;W[pp]C[Sente.]
;B[oo]
(;W[ds]C[This is a weird sente.
What is this? It's obviously sente; I just don't understand why you would play it.]
(;B[ep]
;W[fi]
;B[kh]
;W[jf]
;B[lh]
;W[rb]
;B[rc]
;W[ei]C[White cuts in sente.]
;B[dg]C[This is all very strange. Like, what is this? This is losing a ko threat. What? It's very odd.]
(;W[ch]C[White connects.]
;B[gg]
;W[li]
;B[ng]
;W[of]
;B[gr]C[Black's throwing in for some reason...]
;W[hr]
;B[ag]
;W[ah]
;B[ma]C[... and black captures this and makes a ko...]
;W[la]
;B[kl]C[... and black plays this sente move...]
;W[lk]
(;B[na]C[... and then black fills the ko. I don't know, it's very odd. What?]
;W[qb]
;B[pc]
;W[oe]C[The game really ends here.]
;B[pb]
;W[sb]C[There's some squeeze.]
;B[pa]
;W[nc]
;B[ra]SQ[pd]TR[pg]C[If white ataris at Q13, black can connect at Q16; black can make an eye.]
;W[rm]C[I think white's just desperate?]
;B[sl]
;W[rl]
;B[sk]
;W[pg]
;B[pd]C[I can't even tell who's winning. Apparently, it's 50-50 even.]
;W[da]
;B[ca]
;W[rk]
;B[sj]
;W[ab]C[I think these moves are just nonsense. They're just throwing in to finish the game, I guess.]
;B[bb]
;W[cm]
;B[dm]
;W[cl]
;B[bm]
;W[sg]
;B[qm]
;W[si]
;B[ql]
;W[ba]
;B[aa]
;W[qa]
;B[sa]
;W[ej]
;B[dk]
;W[bn]
;B[an]
;W[el]
;B[dl]
;W[dq]
;B[cr]
;W[lf]
;B[kg]
;W[ho]
;B[gl]
;W[hk]
;B[kd]C[Eventually they're done, and it's a draw. Okay. Very long game, and it ends in a draw.
Very interesting game. AI is very good at all the fundamentals.

[KataGo 50 %\]

-- chat --
Maharani: Video review by streetplay (AGA 5d): https://www.youtube.com/watch?v=wZRkv6yHTWU
Baekh0: what was that endgame?
]
)(;B[oe]C[If black ever plays here, he has to still take at Q17 later, so it doesn't change anything.

[KataGo gives this move -27 pp for black.\]]
;W[lf]C[[KataGo variation.\]]
;B[kg]
;W[ej]
;B[cl]
))(;W[ef]TR[ma]C[I guess technically, if white captures, black has two threats here later. Maybe without the N19 ko on the board, white can mess up? I don't know; it's very hard to interpret.

[KataGo gives this move -15 pp for white.\]]
;B[gg]C[[KataGo variation.\]]
;W[dm]
;B[gl]
;W[dl]
;B[el]
;W[ej]
;B[dk]
;W[li]
;B[ng]
;W[of]
))(;B[dq]C[Why not cut? I guess it's the same thing, either way.
Either way black answers, it's the same points-wise.

[KataGo gives this move -5.8 pp for black.\]]
(;W[dr]TR[ma]C[I'm wondering if maybe it gives white not more ko threats, but a bigger ko threat in the future for, like, the last half-point ko, potentially. I'm not entirely sure, though. There's no ko on this board right now, but there will almost definitely be one at N19.]
)(;W[fi]C[[KataGo variation.\]]
;B[ei]
;W[la]
;B[jf]
;W[kh]
;B[kg]
;W[ih]
;B[mh]
;W[li]
;B[ej]
;W[lf]
;B[lg]
;W[fg]
)))(;W[ho]TR[ep]C[Black's always gonna end up connecting at E4.]
;B[hl]
;W[fo]
;B[ep]
;W[ds]C[And then it's just this move...]
;B[dq]TR[ds]C[... in exchange for capture? I don't think D1 does anything. It's kinda weird. I think the game is just close, so they're confused, maybe.]
))(;W[ma]C[If white connects...

[KataGo gives this move -37 pp for white.\]]
(;B[kl]C[... later, this move could get black some extra points, basically...]
;W[lk]
(;B[ik]
(;W[jk]
;B[hl]C[... maybe?]
)(;W[hl]C[Maybe not.]
))(;B[gj]
;W[fi]
(;B[hl]C[Maybe this way.]
)(;B[ik]C[I thought this one worked, though.]
;W[hl]C[Apparently, this is just sente big enough, huh?]
;B[gl]
;W[jk]
)))(;B[lh]TR[kl]C[Ah, so black doesn't play L8 at all.]
;W[li]C[Let's say white answers...]
;B[hl]TR[ik]TR[mk]C[... then, because black connected at N9, H8 is slightly bigger than normal. Black gets the extra move at J9 later.]
;W[ik]C[So let's say white plays there right away...]
;B[hk]C[... interesting.]
)(;B[hl]C[[KataGo variation.\]]
;W[ik]
)))(;B[hl]C[If black plays this first...

[KataGo gives this move -2.7 pp for black.\]]
(;W[ik]
;B[hk]TR[kl]C[... we get the same shape as in the next variation with the L8 issue...]
;W[mk]
;B[nk]
;W[kl]C[... but white leaves this in ko? I don't know.
This is kind of small endgame; it'd be really tough for me to pick apart without some time.]
)(;W[mk]C[[KataGo variation.\]]
;B[nk]
;W[kl]
;B[lk]
;W[ik]
;B[hk]
;W[jf]
;B[fi]
;W[mk]
;B[oo]
;W[gj]
;B[kh]
;W[ej]
;B[ei]
;W[lf]
;B[kg]
;W[na]
;B[oa]
;W[ma]
;B[mh]
;W[li]
;B[pp]
;W[ae]
;B[ac]
)))(;B[lj]C[If black plays here...

[KataGo gives this move -24 pp for black.\]]
;W[rm]
;B[sl]
;W[rl]
;B[sk]
;W[rk]
;B[sj]
(;W[sf]C[... when white pushes here...]
(;B[sg]
;W[sh]TR[sg]C[... black can't block.]
)(;B[ql]C[So black loses some points here, potentially.]
;W[sg]C[Black doesn't have to capture, but white's next move is sente.]
))(;W[hl]C[[KataGo variation.\]]
;B[ng]
;W[of]
;B[gl]
;W[sf]
;B[lk]
;W[jf]
;B[jh]
;W[ji]
;B[kg]
;W[ei]
;B[kh]
)))(;W[bg]TR[dd]C[If white plays D16 later, it is only 2 points gote.

[KataGo gives this move -1.2 pp for white.\]]
;B[ad]C[[KataGo variation.\]]
;W[af]
;B[rf]
;W[je]
;B[id]
;W[qe]
;B[sf]
;W[lj]
;B[hl]
;W[jf]
;B[kh]
;W[nn]
;B[oo]
;W[mk]
;B[nk]
;W[ik]
;B[hk]
;W[dd]
;B[cc]
;W[ej]
;B[ei]
;W[kl]
;B[om]
;W[lf]
;B[kg]
;W[na]
))(;W[hk]C[Black's kind of worried about this move, right?

[KataGo gives this move -24 pp for white.\]]
(;B[hl]C[Black can do better than this atari, huh?]
)(;B[jj]C[Probably push once?]
)(;B[gj]C[Oh, here?]
(;W[gl]TR[hl]C[Oh, black has a double atari here, I see.]
)(;W[fi]
(;B[gl]C[So black's fine.]
)(;B[fl]C[[KataGo variation.\]]
;W[ei]
;B[gg]
;W[jj]
;B[jh]
;W[ji]
;B[lj]
;W[je]
;B[id]
)))))(;B[ak]C[If black takes...]
;W[qe]C[... I assume that white won't answer; otherwise, black just got 3 points in sente.]
;B[ai]C[So then this one here...]
;W[bh]C[... and there's a half chance at A12...]
;B[rf]
;W[ah]TR[bh]MA[ch]TR[ai]MA[aj]SQ[ak]MA[bk]C[... so this is a 1⅓-point move for white, so I'll give ⅔ points to black as compensation. A11 was a sente exchange. When black captures at A9, this is the shape.
White has 1 point; black has 4 points. So net 3 points for black; but then I have to add ⅔ points, because black gave white A12. So it's 3⅔, but white also has ⅓ point here; so it's 3⅓ points for black, versus 3 points for white in the game.]
))(;B[gi]C[Let's say it's like this...

[KataGo gives this move -20 pp for black.\]]
(;W[hj]
;B[gj]
;W[hk]
;B[gk]
;W[hl]
;B[gl]TR[ii]CR[gj]CR[hj]CR[gk]CR[hk]C[... these are all even exchanges.
Compared to the previous variation, black is missing 5 points. So J11 is a 5-point reverse sente, is kind of how I think about it. That's not really accurate; but without doing a bunch of recursive math, it's very hard to calculate the middle.]
)(;W[nn]C[[KataGo variation.\]]
;B[nm]
;W[oo]
;B[on]
;W[pp]
;B[hj]
;W[qf]
;B[ri]
;W[lf]
;B[lg]
;W[jf]
))(;B[hj]C[As we saw...

[KataGo gives this move -11 pp for black.\]]
;W[gi]C[... there's a hole here.]
;B[ea]C[[KataGo variation.\]]
;W[ha]
;B[hi]
;W[gh]
;B[hh]
;W[gg]
;B[ml]
;W[rg]
;B[ak]
;W[ri]
))(;W[rg]C[Eventually, white's gonna play here...

[KataGo gives this move -37 pp for white.\]]
)(;W[qf]C[... or here. Not sure which is better shape.

[KataGo gives this move -39 pp for white.\]]
;B[ij]C[Let's say black plays here...]
;W[ii]
;B[hi]
;W[hh]C[Wow, this is quite complicated...]
;B[gi]C[... but let's say the shape is like this...]
;W[jj]
;B[ik]C[... make it easy.]
;W[il]
;B[hl]TR[gj]TR[hj]TR[gk]TR[hk]TR[gl]C[Black has 5 points here, eventually, maybe.]
)(;W[ml]TR[nn]C[When white pushes, there's a cut.
I guess in this case, black would tenuki?

[KataGo gives this move -18 pp for white.\]]
(;B[nl]
;W[nn]
)(;B[km]C[Oh, that's cool...]
(;W[jm]
;B[lm]
;W[kn]
;B[ij]C[... and then black plays here.]
;W[nn]
;B[nm]C[This one, black's gonna sac it?]
;W[oo]
;B[jh]C[Yeah, black doesn't care; he just gets more in the middle.
I'd have to spend a lot of time in a long match to figure out this exact center endgame; that's not something I'm very good at.]
)(;W[lm]C[[KataGo variation.\]]
;B[jm]
;W[nn]
;B[ii]
;W[lf]
;B[lg]
;W[ke]
;B[if]
;W[gg]
;B[gh]
;W[ij]
))))(;W[sn]C[Later, white's T6 hane is usually sente...

[KataGo gives this move -37 pp for white.\]]
;B[sm]
;W[so]TR[rj]SQ[rn]MA[ro]C[... but since black has the S10 stone, black S6 becomes a better endgame than the S5 hane. That's kinda cool.
You have to be very careful with this...]
;B[qf]
;W[rm]
;B[sl]
;W[rl]
;B[sk]TR[rm]C[... because the S7 cut is not strictly doing anything.
Sometimes, the local endgame changes based on the exact border configuration. Actually, that's very common, I guess.]
))(;B[ro]C[[KataGo gives this move -1 pp for black.\]]
;W[rp]C[[KataGo variation.\]]
;B[ea]
;W[ha]
;B[bl]
;W[rn]
;B[rm]
;W[so]
;B[ml]
;W[re]
;B[rd]
;W[hj]
;B[ii]
;W[ik]
;B[lj]
;W[kj]
;B[km]
;W[jm]
;B[lm]
;W[kn]
;B[rg]
;W[qf]
;B[rf]
))(;B[ea]C[You might see people play this atari really early...

[KataGo gives this move -3.6 pp for black.\]]
;W[ha]
(;B[ib]C[... but you notice that if you play here, that technique just falls apart. Black can just get captured. I think white doesn't even have to answer.]
(;W[ic]C[White COULD ansewr, though.]
;B[kb]
;W[ia]C[Maybe it doesn't matter that much.]
)(;W[ja]TR[ha]C[But there are some cases where having a white stone at H19 might be helpful, like if it's this, or something.]
))(;B[bl]C[[KataGo variation.\]]
;W[rn]
;B[rm]
;W[ro]
;B[ml]
;W[gi]
;B[km]
;W[kn]
;B[gh]
;W[ii]
)))(;B[ro]C[Black can make one exchange.

[KataGo gives this move -2.6 pp for black.\]]
;W[rp]
(;B[mm]C[Here.
Let's keep that in mind; I thought the upper right and bottom right are roughly similar.]
)(;B[gr]C[[KataGo variation.\]]
;W[hr]
;B[fr]
;W[cl]
;B[hq]
;W[dl]
;B[hj]
;W[ir]
;B[mm]
;W[ll]
;B[el]
;W[rn]
;B[rm]
;W[so]
)))(;B[lm]C[If black does this...

[KataGo gives this move -25 pp for black.\]]
;W[eo]C[... and white defends, then black has created another place in the middle right that he has to clean up...]
(;B[li]C[... but it's very hard to clean up.]
)(;B[dq]C[[KataGo variation.\]]
;W[fh]
;B[gr]
;W[hq]
;B[fr]
;W[ki]
;B[ni]
;W[nj]
;B[kg]
;W[mk]
;B[lj]
;W[ll]
;B[kk]
;W[kl]
;B[jk]
)))(;W[bj]
(;B[hf]C[If black ever gets a stone here...]
;W[fh]
;B[hd]
;W[id]
;B[ge]TR[hd]TR[ie]C[... this push and cut can become relevant.]
)(;B[ie]
;W[hd]TR[ie]C[So black doesn't necessarily want to fix this for white.]
))(;W[gg]TR[go]C[If white didn't play G5...]
;B[go]
;W[eo]
;B[ep]
;W[dq]
;B[cr]C[... black could capture everything.]
))(;B[li]C[I think I would have played hane, maybe.

[KataGo gives this move -5.9 pp for black.\]]
;W[go]C[[KataGo variation.\]]
;B[eo]
;W[ln]
;B[if]
;W[fh]
;B[hh]
;W[hd]
;B[gr]
;W[hq]
;B[fr]
;W[je]
;B[bj]
;W[aj]
;B[ak]
)(;B[ie]C[I'm never fighting this one. I guess maybe in a long game; that makes sense. This is basically the same thing as the game...

[KataGo gives this move -0.8 pp for black.\]]
;W[hd]
(;B[ig]TR[hd]TR[ie]C[... plus the one exchange. Sometimes black doesn't want that exchange, although the lower-playout AI says, just sell it.]
)(;B[go]C[[KataGo variation.\]]
;W[jh]
;B[kh]
;W[ki]
;B[ji]
;W[kg]
;B[lh]
;W[ii]
;B[jj]
;W[jg]
;B[ih]
;W[lf]
;B[ea]
;W[ha]
;B[ig]
;W[lg]
;B[if]
;W[fh]
;B[gi]
;W[kj]
;B[kk]
;W[lk]
;B[jk]
;W[ll]
;B[hs]
;W[ln]
;B[ir]
;W[hr]
;B[hp]
;W[hq]
;B[gs]
;W[iq]
;B[bj]
;W[aj]
;B[ak]
;W[ai]
;B[bk]
;W[rn]
;B[rm]
;W[ro]
;B[nm]
;W[mm]
;B[nn]
;W[nl]
;B[ol]
;W[ok]
;B[km]
;W[kl]
;B[lm]
)))(;B[dg]TR[ci]C[White C11 is saying, "If you play D13..."]
;W[dh]C["... I don't care..."]
;B[eh]
;W[ch]
;B[eg]
;W[ck]C["... because I will take all your points."]
))(;W[ni]C[If white doesn't defend...]
(;B[dg]
;W[dh]C[... I think white has to worry about this kind of thing?]
;B[ff]C[Apparently not.]
)(;B[fe]C[Locally, some sort of separation is what I'd be worried about as white...]
;W[ef]
;B[ea]
;W[ha]
;B[ff]C[... apparently even this kind of thing.]
(;W[eg]C[If white answers...]
;B[hd]C[... this push is huge. Black breaks the top side.]
)(;W[hd]
;B[dg]
;W[eg]
;B[dh]TR[gb]TR[gc]TR[fd]TR[gd]TR[fe]TR[ff]C[Okay, we're trying to go for a big trade. White gets the F16 stones, black gets the left; which is also totally fine for black.]
))))(;B[ni]C[White says, there's no good way for black to protect...

[KataGo gives this move -3.5 pp for black.\]]
(;W[nj]C[... because if it's like this...]
;B[li]
;W[mk]
;B[lj]C[... black is losing some things in the middle.]
(;W[nl]C[I assume there's a move here.]
)(;W[ol]C[Maybe this one? I don't know.]
)(;W[ln]C[Oh, just directly.]
;B[lm]
;W[km]TR[ne]C[Basically, white's gonna leverage the O15 cut.]
;B[lk]C[White's gonna wait until she gets everything here first...]
;W[mm]
;B[ml]
;W[ll]
;B[nk]
;W[ne]C[... and then fix.
And then black's, like, "Why did I give you all that in the center just to have you come back here if I had to play a whole bunch of zero-point moves myself?"]
))(;W[ln]C[[KataGo variation.\]]
;B[gb]
;W[ga]
;B[ne]
;W[nj]
;B[li]
;W[mk]
;B[lj]
;W[nn]
;B[ad]
;W[dd]
;B[cc]
;W[fe]
;B[fc]
;W[kg]
;B[eb]
;W[go]
;B[eo]
;W[cj]
))(;B[li]C[Hane on this side - possible...

[KataGo gives this move -4.7 pp for black.\]]
;W[lh]C[... but there's a ladder consideration...]
;B[ni]
;W[mh]
(;B[kh]TR[le]C[... which right now is good for white. It hits M15.]
(;W[ng]C[There are two cuts here.]
)(;W[lg]
(;B[ng]
;W[nj]
)(;B[nj]
;W[ng]TR[li]C[So it's hard for black to do this.]
)))(;B[gb]C[[KataGo variation.\]]
;W[ga]
;B[eb]
;W[fc]
;B[gd]
;W[ed]
;B[ec]
;W[fa]
;B[kh]
;W[lg]
;B[lf]
;W[kg]
;B[kf]
;W[jg]
;B[jf]
;W[ig]
;B[hf]
;W[if]
)))(;W[cb]C[What happens with this kind of thing?

[KataGo gives this move -5.3 pp for white.\]]
(;B[ne]C[Hahahaha! Black doesn't care, he just trades.]
;W[oj]C[[KataGo variation.\]]
;B[pk]
)(;B[gf]C[Locally, big trades are happening.]
;W[ge]
;B[fe]
;W[ff]C[White can't actually kill, huh?]
;B[ef]
;W[fg]
;B[ed]C[Black can always take these.]
;W[bb]
;B[dd]
;W[dh]
;B[eh]C[This is just a cut.]
;W[fh]
;B[eg]
;W[ei]
;B[fi]
;W[gi]
;B[fj]C[White has too many weaknesses; okay. So one issue is that black can actually just break out.]
))(;W[gf]C[Let's say white defends...]
)(;W[fe]C[... somehow.

[KataGo gives this move -16 pp for white.\]]
(;B[eb]TR[gb]C[Then black can play here.
White's G18 push is threatening an eye.]
;W[cb]C[White peeps.]
;B[cc]
;W[bb]TR[ad]C[If white tries to kill, black's A16 hane is sente, too, but...]
;B[gb]C[... black pushes.]
;W[ga]C[White blocks.]
;B[fc]C[Black ataris.]
;W[fa]C[White connects.]
;B[ad]C[Black hanes.]
;W[bf]
;B[ea]
;W[ha]
(;B[hd]C[This is also a big issue here.]
)(;B[ba]C[Locally...]
;W[ab]
;B[ac]
(;W[ca]C[... white is probably alive like this.]
)(;W[ec]
;B[ed]
;W[gd]
;B[ca]C[There's a little bit of trickiness.]
;W[dd]
;B[ec]
;W[ae]
;B[da]TR[ad]C[This is, at worst, seki. So that's nothing for black to worry too much about as long as he times the A16 hane appropriately.]
)))(;B[ne]C[[KataGo variation.\]]
;W[oj]
;B[pk]
;W[mi]
;B[ni]
;W[nj]
;B[li]
;W[mk]
;B[lj]
;W[ri]
;B[rk]
;W[nl]
))(;W[ne]TR[mj]C[If white connects, black has gained something, and white's just played a move that saves her group but doesn't gain her anything. The exchange is good for black.
If white comes back...

[KataGo gives this move -7.3 pp for white.\]]
(;B[dj]C[... black does something...]
;W[oj]TR[ne]C[... and white pushes, black may not answer, because the value of defending has decreased since white added a move at O15.]
)(;B[eb]C[[KataGo variation.\]]
;W[gb]
;B[gf]
;W[eg]
;B[ad]
;W[bf]
;B[cb]
;W[ln]
)))(;B[gf]TR[cb]TR[db]C[If white goes for C18 and the D18 connect, there are too many weaknesses for her on the outside. You know, just AI level life and death reading. Actually, to be honest, I think most pros could read this. It'd take me forever, though, to be confident in that.

[KataGo gives this move -13 pp for black.\]]
;W[ef]C[[KataGo variation.\]]
;B[eb]
;W[fc]
;B[kg]
;W[oj]
;B[pk]
;W[ln]
;B[je]
;W[gd]
;B[ne]
;W[mj]
;B[jb]
;W[cb]
))(;W[cj]C[For example, if white makes a base...

[KataGo gives this move -11 pp for white.\]]
(;B[gf]TR[df]C[... there are still problems with black coming out with D14.]
)(;B[di]C[There are still problems for white with this kind of move...]
;W[ci]
;B[dg]TR[df]C[... aiming to bring the stone out. Obviously, it doesn't work right now for black.]
)(;B[bd]C[[KataGo variation.\]]
;W[go]
))(;W[eg]C[If white adds a move to protect...

[KataGo gives this move -21 pp for white.\]]
(;B[gf]C[... this is still an issue...]
)(;B[dh]C[... and it's also pretty slow against the peep and stuff.]
))(;W[fe]C[If white plays like this...

[KataGo gives this move -13 pp for white.\]]
(;B[di]C[... still, moves like this can threaten...]
)(;B[eh]C[... here...]
)(;B[eg]C[... or black can just drag the stone out later.]
)(;B[cj]C[It's not perfect for white...]
)(;B[bd]C[... is all I'm saying.]
;W[ln]C[[KataGo variation.\]]
;B[go]
;W[oj]
;B[pk]
;W[ki]
;B[jh]
;W[kh]
;B[hd]
;W[id]
;B[gd]
;W[ge]
;B[gb]
)))(;B[gf]C[Black doesn't know if he's gonna go this way later...

[KataGo gives this move -4.8 pp for black.\]]
;W[ge]C[[KataGo variation.\]]
;B[fe]
;W[ff]
;B[er]
;W[ln]
;B[mj]
;W[ef]
;B[bd]
;W[oj]
;B[pk]
;W[kg]
;B[jh]
;W[jg]
;B[gb]
)(;B[ef]C[... or make a big fight later...]
;W[ff]
;B[dh]
)(;B[di]C[... or add a sente move later.

[KataGo gives this move -33 pp for black.\]]
;W[eg]
))(;W[ce]TR[dc]C[D17 protects against this push.

[KataGo gives this move -9.9 pp for white.\]]
;B[de]
(;W[ed]
;B[ec]
;W[dd]C[Obviously, there's sort of this cut...]
(;B[fe]C[... but right now, it's fine.]
)(;B[ff]C[Even if black gets squeezed...]
;W[cc]
;B[fe]C[... it's probably okay-ish.]
))(;W[bd]C[[KataGo variation.\]]
;B[er]
;W[ln]
;B[bc]
;W[ed]
;B[dd]
;W[ci]
)))(;B[bd]C[If black blocks...

[KataGo gives this move -2.8 pp for black.\]]
(;W[ce]C[... white's just gonna push up...]
;B[de]
;W[dd]C[... and cut, probably? Maybe not.]
)(;W[de]C[Maybe this push.]
(;B[ce]C[Black would have to block like this...]
;W[cf]TR[dc]C[... but then black's center is really weak, and there's still a white jump at D17.]
(;B[ff]
;W[ec]C[Black's corner is weak.]
;B[bf]
;W[bg]
;B[ae]C[Eventually, black has to capture here, is probably the way to live; and then he has weaknesses on the other side.]
)(;B[dd]C[[KataGo variation.\]]
;W[dq]
;B[er]
;W[eo]
;B[go]
;W[gp]
;B[cr]
;W[hp]
;B[kf]
;W[ln]
;B[ne]
;W[oj]
;B[pk]
;W[mj]
;B[ki]
;W[je]
;B[lk]
;W[ml]
;B[lm]
;W[km]
;B[ll]
))(;B[cf]C[And if black goes down...]
;W[ce]
;B[bf]TR[af]TR[ef]C[... black doesn't have time to go down, really, I don't think. I don't know if turn or hane is better for white.]
;W[af]
;B[ag]
;W[ae]
;B[bg]C[If it's like this...]
;W[dc]C[... black's corner is in trouble.]
))))(;W[eh]C[The natural move is to play here...

[KataGo gives this move -13 pp for white.\]]
;B[cf]TR[eh]C[... but it is kind of weak against this block that fixes black's shape.]
))(;B[ed]C[Black won't defend like this.

[KataGo gives this move -11 pp for black.\]]
;W[ce]C[White's gonna attach, probably; and that makes a very clean side shape, is my guess.]
(;B[bd]
)(;B[be]C[Oh, black hanes. Same thing, though.]
;W[bf]
;B[de]
;W[df]C[This ko is, like, unwinnable for black...]
(;B[dd]C[... so eventually, black connects and white says, "Ha! I'm very flexible."]
;W[bd]C[White has this cut later if black attacks her, or she can play away somewhere.]
)(;B[cf]C[[KataGo variation.\]]
;W[pc]
;B[pb]
;W[ce]
;B[dd]
;W[dq]
;B[er]
;W[eo]
;B[go]
;W[gp]
;B[cr]
;W[hp]
;B[lm]
;W[km]
;B[jm]
)))(;B[dc]C[If black defends like this, though, it's also very slack.

[KataGo gives this move -2.6 pp for black.\]]
(;W[fe]C[Blocking is strong.]
)(;W[ce]C[Attach is maybe strong later.]
)(;W[dq]C[[KataGo variation.\]]
;B[er]
;W[eo]
;B[go]
;W[gp]
;B[cr]
;W[hp]
;B[ne]
;W[mj]
;B[kf]
;W[je]
;B[hf]
;W[oj]
;B[ge]
;W[hd]
;B[pk]
;W[ln]
;B[bf]
))(;B[gf]C[I would have thought here, too.

[KataGo gives this move -1.8 pp for black.\]]
(;W[ce]TR[gf]C[The problem with G14 is that this attach is still strong.]
)(;W[ec]C[But also this peep...]
)(;W[dc]C[... or this one later are very annoying.]
;B[df]C[[KataGo variation.\]]
;W[de]
;B[cf]
;W[ef]
;B[dg]
;W[ce]
;B[be]
;W[eg]
;B[dh]
;W[bf]
;B[bc]
;W[bh]
;B[eh]
;W[fh]
;B[ch]
)(;W[ci]C[White would defend first.]
(;B[hf]
)(;B[ck]TR[dc]TR[ce]C[If black plays a slack move, white's gonna aim at D17, or the C15 attach to make shape.]
))))(;W[dd]C[We've learned that this is not a move. That's cool.

[KataGo gives this move -7.8 pp for white.\]]
(;B[de]
(;W[ee]
;B[ed]TR[gc]C[Learning that this is not a thing for white with black's G17 kick is super valuable.]
)(;W[ce]C[That means I don't have to worry as much about this corner as black, personally.]
))(;B[dc]C[[KataGo variation.\]]
;W[dq]
;B[er]
;W[eo]
;B[cr]
;W[dr]
;B[ds]
;W[br]
;B[cs]
;W[fr]
)))(;B[ho]C[[KataGo gives this move -4 pp for black.\]]
(;W[jo]C[If it's this shape here...]
;B[eo]C[... white can't atari this cut...]
;W[go]C[... white would have to go this way...]
;B[dq]C[... and then black could cut like this.]
)(;W[ip]C[[KataGo variation.\]]
;B[ko]
;W[dq]
;B[no]
;W[mo]
;B[mn]
;W[nn]
;B[oo]
;W[cj]
;B[mj]
;W[oj]
))(;B[gf]C[If I'm black, there are two options: I can defend the corner, but I don't see a great way to do that. If black plays here...

[KataGo gives this move -3.1 pp for black.\]]
(;W[cj]C[... white's just gonna happily extend on the left.]
)(;W[ci]C[[KataGo variation.\]]
;B[bf]
;W[jo]
;B[dh]
;W[bg]
;B[cf]
;W[ck]
;B[bl]
;W[bk]
;B[ej]
;W[dj]
;B[bj]
;W[cm]
;B[bm]
;W[dm]
;B[bn]
;W[ek]
;B[fj]
;W[fk]
;B[gj]
;W[gk]
;B[hk]
))(;B[ci]TR[ec]TR[dd]C[The other option is a pincer of some kind. I assume for white, there's something like E17 or D16.

[KataGo gives this move -4.1 pp for black.\]]
(;W[di]C[Let's just make a simple exchange. White leans on this.]
(;B[cj]TR[dd]SQ[cg]C[Okay, white's just gonna lean on the top left next, I guess is also good enough.
I wonder why D16 doesn't work, 'cause it is often the follow-up to C13.]
(;W[dd]C[Let's see.]
(;B[cc]
;W[df]
;B[dc]TR[hb]TR[gc]C[Normally, without the kick, the follow-up is this shape.]
)(;B[de]TR[hb]TR[gc]C[But with the kick...]
;W[cc]
;B[dc]
(;W[ed]
;B[ee]
;W[ec]
;B[db]TR[hb]TR[gc]C[I guess the ladder is not working for white because of the kick, maybe...?]
;W[ce]
;B[bd]
;W[eb]
;B[cb]
;W[be]
;B[bc]C[... Yeah, that's kinda cool.]
(;W[gb]TR[hb]TR[gc]C[White can't link up because of the kick exchange; that's pretty funny.]
;B[fb]
(;W[fa]C[Actually, white can link up! But needing to link at the top means that black is a bit more efficient than the usual shape!]
)(;W[fe]TR[hb]TR[gc]C[Without the kick, normally white would cut here instead.]
))(;W[fb]C[White would have to play like this or something, but that's really bad shape...]
;B[eg]SQ[hb]SQ[gc]TR[be]TR[ce]TR[cg]C[... and the left is dying. That's so funny. So the kick exchange makes a big difference.]
))(;W[ce]TR[bd]C[So here, white has to change her plans. That's good to know.
Black's looking at the extend, huh?]
)))(;W[ef]TR[hb]TR[gc]C[So white threatens the corner; doesn't directly go in. I didn't know the kick made it that secure.]
)(;W[gf]C[Interesting. This one, really?
Oh, I see...]
;B[eg]C[... if black splits, which is, I guess, the best...]
;W[ef]
;B[df]
;W[ee]
;B[dg]
;W[fg]C[... white then has good shape...]
;B[dc]C[... and black has to defend the corner.]
(;W[fi]C[So if white plays here, she ends up kind of reducing in sente.]
;B[dh]
)(;W[jo]TR[fi]C[If white doesn't play F11, she didn't really lose that much.]
;B[fh]TR[cg]TR[di]SQ[cj]C[For example, if black plays here, white has lost one exchange, and C13 was kind of wasted; but black kind of added a protective move. So as long as white gets a little bit of value back later, it'll be okay.]
;W[gh]C[For example.]
(;B[fi]
;W[gi]
;B[fj]
)(;B[gi]TR[di]C[If white didn't have D11, black would double-hane.]
;W[eh]TR[di]C[But since white has D11...]
;B[fi]
;W[de]
;B[cf]C[... white could break the side.]
))))(;B[jo]C[[KataGo variation.\]]
;W[cj]
;B[jp]
;W[ip]
;B[iq]
;W[dq]
;B[mr]
;W[lq]
;B[mq]
;W[mp]
;B[hq]
;W[gp]
;B[lp]
;W[kp]
;B[lo]
;W[ko]
;B[jq]
;W[ln]
;B[mo]
;W[no]
))(;W[ec]C[And what about this one?]
;B[ed]TR[fb]C[Black just ignores, because he's saying white F18 is too slow?]
(;W[fb]
)(;W[dc]
;B[dd]
(;W[cc]TR[gb]C[Oh wow, black can get G18 in sente.]
)(;W[gb]C[White comes back...]
;B[fg]C[... and black attacks the left. Yeah, makes sense.
That's cool, I didn't know this. That's a good thing to know.]
))))(;B[di]C[One of these two pincers, usually. But none of black's options seem really appealing.

[KataGo gives this move -14 pp for black.\]]
;W[jo]C[[KataGo variation.\]]
;B[ho]
;W[dq]
;B[hp]
;W[gp]
;B[go]
;W[eo]
))(;W[ko]TR[dq]C[White doesn't want to spend another move. Not fixing the D3 cutting point, and having to answer with a weakness and being pushed back, is better for black.

[KataGo gives this move -9.4 pp for white.\]]
;B[ho]C[[KataGo variation.\]]
;W[go]
;B[lo]
;W[lp]
;B[kp]
;W[no]
;B[jp]
;W[jo]
;B[hp]
;W[gp]
;B[lq]
;W[ln]
;B[mp]
))(;B[dq]C[Later when black cuts here, there are not really that many issues for white, I guess. But there could be potential issues.

[KataGo gives this move -19 pp for black.\]]
;W[eq]C[[KataGo variation.\]]
;B[gf]
;W[ce]
;B[be]
;W[dd]
;B[cc]
)(;B[cr]C[If black plays here in endgame...

[KataGo gives this move -9.3 pp for black.\]]
(;W[im]
;B[eq]C[... there's this hane in sente...]
(;W[ep]
;B[dq]
;W[eo]C[... which can be quite big.]
)(;W[dq]
;B[dr]C[Or this way.]
))(;W[cg]C[[KataGo variation.\]]
;B[eq]
;W[gp]
;B[nk]
;W[mj]
;B[kn]
;W[km]
;B[lm]
)))(;W[dq]C[If white does nothing, say she connects, defending the obvious cutting point...

[KataGo gives this move -11 pp for white.\]]
;B[gq]C[... black is saying he's gonna hane...]
;W[fr]C[... white defends...]
;B[mr]C[... and wow, black even pulls out like this. That's pretty wild.]
;W[lq]
;B[mq]
;W[mp]
;B[lp]
;W[lo]
;B[kp]
;W[lr]
;B[ko]SQ[fp]TR[kp]TR[lp]SQ[gq]C[So white can't contain these stones. How do the F4 stones help, though?
The idea is that later, black might be able to link them up.]
(;W[ns]C[For example...]
;B[ln]
;W[ms]
;B[kn]C[... just to make it easy...]
;W[nn]
(;B[gp]TR[eo]C[... later, not right now, if black ever gains a connect here and threatens the E5 cut, white's outside is surrounded.]
)(;B[jm]
;W[ni]
;B[ip]TR[eo]SQ[fp]SQ[gq]C[Even something like this could threaten the cut. It would be better to have the F4 exchanges than not.]
))(;W[nn]C[[KataGo variation.\]]
;B[ln]
;W[mn]
;B[lm]
;W[im]
;B[nm]
;W[ns]
;B[mm]
;W[oj]
)))(;B[im]C[[KataGo gives this move -1.2 pp for black.\]]
;W[in]C[In this case, white connects; she's happy.]
;B[hd]C[[KataGo variation.\]]
;W[id]
;B[gd]
;W[ic]
;B[ie]
;W[ce]
;B[jd]
;W[jb]
;B[be]
;W[if]
;B[gg]
;W[je]
;B[cf]
;W[de]
;B[df]
;W[dd]
;B[cc]
;W[dc]
;B[ef]
;W[bf]
;B[bd]
;W[bg]
)(;B[in]C[But you have to be careful about black's wedge...

[KataGo gives this move -2.1 pp for black.\]]
;W[io]
;B[im]
(;W[jo]C[... if your left-side liberties are short.]
)(;W[ko]C[[KataGo variation.\]]
;B[gf]
;W[cg]
;B[ci]
;W[di]
;B[cj]
;W[fg]
;B[gq]
;W[gr]
;B[fr]
;W[hr]
;B[no]
;W[mo]
;B[mp]
;W[mq]
;B[mn]
;W[lo]
;B[hf]
;W[dj]
;B[ie]
;W[jb]
;B[ic]
;W[ib]
))(;B[mr]C[My AI says, just do this immediately...

[KataGo gives this move -0.7 pp for black.\]]
;W[lq]
;B[mq]
;W[mp]
;B[lp]
;W[lo]
;B[kp]
;W[lr]
;B[ko]C[... and just break out.]
;W[nn]C[[KataGo variation.\]]
;B[in]
;W[io]
;B[im]
;W[jo]
;B[gf]
;W[oj]
;B[pk]
;W[kn]
;B[hf]
;W[ch]
;B[bg]
;W[ei]
;B[gi]
;W[cj]
;B[bh]
;W[gj]
;B[hj]
;W[cg]
;B[bi]
;W[cf]
;B[bf]
;W[ce]
;B[bd]
;W[gh]
;B[hi]
;W[fi]
;B[fg]
))(;W[im]C[The move that white probably wants to play is hane...

[KataGo gives this move -4.7 pp for white.\]]
;B[in]C[... but then black will cut, and I don't know what's gonna happen.]
(;W[jm]TR[dm]SQ[io]TR[np]TR[nq]C[If white extends here, which is the most natural-looking move, there are clearly some issues with the O3 stones and the D7 cut. It's kind of hard for her to handle both sides, so white would have to play J5 instead of K7.]
;B[io]C[I assume black goes down.]
;W[ko]C[White covers.]
;B[hq]C[This one's threatening white's group.]
;W[dq]C[If white defends...]
;B[kp]C[... some attachment.]
(;W[lp]C[If white hanes...]
;B[kq]
;W[lq]
;B[kn]
;W[jn]
;B[jo]
;W[lo]C[Yeah, this is just living for black.]
;B[gr]C[Often, this kind of shape is alive.]
;W[kr]
;B[ho]
;W[gp]
;B[jr]
;W[ir]
;B[lr]
;W[hp]C[Even if black dies, apparently it's fine.]
;B[il]
;W[jl]
;B[jk]C[Yeah, black just gets enough liberties to keep pushing, sure. I think black could have also aimed at some other things.]
)(;W[lo]C[If white extends...]
;B[lp]
;W[mo]TR[mr]C[... oh, black pulling back at N2 is gonna be big later.]
;B[fp]C[If black gets enough space here, this is also in trouble.]
;W[gq]
;B[ho]
;W[gp]
;B[go]
;W[eo]C[That's crazy.]
;B[hr]TR[fo]C[This is just a wild variation; but yeah, I can see that this black group is probably pretty hard to kill if white's group is also hanging.
The white group looks like it has a lot of eyes, but it's undercut and white still hasn't captured at F5.]
;W[lr]C[If white plays a slack move...]
;B[er]
;W[eq]
;B[br]C[... black's just gonna threaten from both sides...]
;W[gr]
;B[jr]C[... make an eye...]
;W[dr]C[... white lives...]
;B[cs]C[... black lives...]
;W[ds]
;B[fo]
;W[gs]C[... or maybe white doesn't live.]
;B[hp]C[Maybe it's a big, big race.]
;W[jp]
;B[ir]
;W[kr]C[Seems like black's winning by the AI judgment. Pretty crazy.]
))(;W[jn]C[[KataGo variation.\]]
;B[io]
;W[jo]
;B[ho]
;W[ip]
;B[hp]
;W[hq]
;B[jp]
;W[iq]
;B[jm]
;W[il]
;B[kn]
;W[ko]
;B[lo]
;W[kp]
;B[kq]
;W[jq]
;B[lp]
;W[jp]
;B[no]
;W[ch]
;B[dq]
;W[cf]
))(;W[in]C[If white extends...

[KataGo gives this move -4.8 pp for white.\]]
(;B[im]C[... black probably won't push again.]
;W[jn]TR[im]C[White may not extend again, but black probably won't push at J7. This extra push exchange is slightly better for white. She gained a little bit.]
)(;B[mr]C[[KataGo variation.\]]
;W[lq]
;B[mq]
;W[mp]
;B[lp]
;W[lo]
;B[kp]
;W[lr]
;B[ko]
;W[nn]
;B[ln]
;W[no]
;B[kr]
;W[pc]
;B[pb]
;W[ns]
;B[nk]
;W[mj]
;B[ll]
;W[kj]
;B[gf]
;W[km]
;B[lm]
;W[om]
;B[pl]
;W[kn]
)))(;B[hm]C[Even in this variation...

[KataGo gives this move -3.4 pp for black.\]]
;W[im]
;B[in]
(;W[jm]
;B[ho]C[... the AI wants this hane.]
)(;W[jn]TR[nr]C[O2 is definitely gonna help black make enough space to live.]
;B[io]
;W[jm]
;B[pr]
;W[qr]
;B[nr]
;W[ps]
;B[jo]
;W[ln]
;B[hq]
;W[cr]
;B[fp]C[Let's play something very simple.]
;W[ep]
;B[fr]
;W[er]
;B[gq]
;W[eq]
(;B[mo]C[Yeah, there's this weakness...]
)(;B[lp]C[... this stone...]
)(;B[gr]C[... here...]
;W[gp]
;B[hp]
;W[go]
;B[lq]C[... even just this would be good enough for black. Wild.]
))(;W[dl]C[[KataGo variation.\]]
;B[pr]
;W[qr]
;B[jn]
;W[dm]
;B[bm]
;W[jm]
;B[ho]
;W[hl]
;B[gl]
;W[hk]
;B[gk]
;W[gj]
;B[ek]
;W[dj]
;B[dk]
;W[ck]
)))(;W[hn]C[[KataGo gives this move -26 pp for white.\]]
;B[gn]C[If black wedges here...]
;W[go]
;B[gm]C[... it will make problems for white.]
;W[ho]C['Cause even if white defends one...]
;B[dq]C[... she's short on liberties.]
;W[eq]
;B[eo]C[Double atari.]
))(;B[nr]C[Black has this cut.

[KataGo gives this move -1.7 pp for black.\]]
(;W[mr]C[Otherwise...]
;B[pr]
;W[ns]
;B[qr]
;W[rq]
;B[rr]
(;W[sr]C[I thought there was a thing where white just hanes here.]
;B[ro]C[I think there are some corner endgame type of things that can happen where black gets this hane in sente.]
;W[qq]C[I think the shape is the same.]
;B[rp]C[Black has to take a liberty at some point.]
;W[rn]C[Oh yeah, and white cuts...]
;B[rm]
;W[rs]C[... and then takes a liberty.]
;B[pp]
;W[sq]
;B[sn]
;W[ps]TR[rm]TR[qn]TR[sn]TR[ro]C[Black's corner dies; but getting the ponnuki and hane here and forcing the squeeze is big endgame for black later.]
)(;W[rn]C[White hanes first.]
;B[rm]
;W[ro]C[This is a weird race thing.]
))(;W[pr]TR[nr]C[Which means that when black cuts, white will usually connect...]
(;B[no]C[... and then often, what black wants to do is use this hane at the head...]
)(;B[lp]C[... or a move around here...]
)(;B[lq]TR[np]TR[nq]C[... can be sente against the O3 stones, to combine with some weakness on the bottom.]
)(;B[mr]C[[KataGo variation.\]]
;W[lq]
;B[mq]
;W[mp]
;B[lp]
;W[lo]
;B[kp]
;W[lr]
;B[ko]
;W[nn]
;B[em]
;W[fn]
;B[fm]
;W[gn]
;B[ln]
;W[mn]
;B[gm]
;W[hn]
;B[lm]
;W[om]
;B[nl]
;W[ol]
;B[ok]
;W[mj]
;B[nk]
))))(;W[em]C[I think white's bottom right corner is not completely dead.

[KataGo gives this move -47 pp for white.\]]
(;B[pr]
;W[qr]
;B[pp]
;W[qq]
;B[or]
;W[rn]C[For example here, white can still live.]
)(;B[or]
;W[pr]C[Or here, I think white is alive, but black has some sente moves around it.]
;B[rr]
;W[rq]C[I haven't studied this in a very long time.]
;B[ro]
;W[nr]
;B[os]
;W[rp]
;B[rn]
;W[qr]
;B[pp]
;W[rs]C[Yeah, white's fine.]
)))(;W[oq]C[If white connects...

[KataGo gives this move -0.9 pp for white.\]]
(;B[mo]C[... black can later reduce the bottom like this...]
)(;B[lo]C[... or even farther, sometimes.]
)(;B[em]C[Black just connects.]
;W[fn]TR[fm]C[Black doesn't push, is what I assume would happen.]
;B[fm]C[Maybe black does.]
;W[gn]
;B[gm]
;W[hn]C[Black definitely stops pushing at this point.]
(;B[mj]TR[gf]C[Black would go this way, huh? Or maybe make the G14 bluff big? I don't know.]
)(;B[hm]C[Even if black pushes...]
;W[im]TR[op]TR[oq]C[... I guess with the bottom right shape, hane is possible now for white.]
;B[in]TR[jm]C[So black cuts... hmmm. Originally, I had white K7, unless some big trade happens?]
(;W[jm]
;B[ho]C[Maybe hane is interesting.]
;W[gp]
;B[dq]C[Because the bottom side is more open, black's not trying to live inside; he's just trying to reduce the aji of this space, is what it looks like...]
;W[jn]
;B[io]
;W[kp]
;B[gf]C[... yeah.]
)(;W[jn]C[If white wants to play very aggressive like this...]
;B[io]
;W[jm]TR[fp]C[... black has F4 as a sacrifice.]
;B[hq]SQ[jp]TR[nr]C[Now AI's saying with the space here, with black O2 not being there, K4 might be enough for white.]
))(;B[gf]C[[KataGo variation.\]]
;W[ig]
;B[hh]
;W[ce]
;B[de]
;W[cf]
;B[ch]
;W[bd]
;B[cc]
;W[bc]
;B[bb]
;W[df]
;B[dh]
;W[ee]
;B[ed]
;W[dd]
;B[dc]
;W[eg]
;B[hf]
;W[eh]
;B[ei]
;W[fi]
;B[ej]
;W[if]
;B[ge]
;W[hg]
)))(;W[mr]C[Maybe the issue is that black doesn't want white to play here.

[KataGo gives this move -1 pp for white.\]]
;B[em]
;W[fn]
;B[fm]
;W[gn]
;B[gm]
;W[hn]C[It seems like in this variation, AI as black really doesn't push at H7.]
(;B[hm]
;W[im]
;B[in]C[Yeah, N2 is definitely gonna help white out more.]
;W[jn]C[Ooh, white can just go down.]
;B[io]
;W[jm]
;B[fp]C[Yeah, this looks tougher for black than the game.]
;W[ep]
;B[gq]
;W[gp]C[There's nothing really here for black.]
)(;B[gf]C[[KataGo variation.\]]
;W[dl]
;B[dm]
;W[ig]
;B[hh]
;W[ch]
;B[bg]
;W[bh]
;B[cg]
;W[ei]
;B[dh]
;W[di]
;B[ci]
;W[bi]
;B[cj]
;W[bj]
;B[ck]
;W[dg]
;B[eh]
;W[df]
;B[cf]
;W[cl]
;B[bk]
;W[bl]
;B[ej]
;W[fi]
;B[ek]
;W[gg]
;B[hg]
;W[ff]
;B[hf]
;W[dd]
)))(;B[pp]TR[op]C[The downside of P4 is that black loses this exchange...

[KataGo gives this move -2.8 pp for black.\]]
;W[qq]C[... which can be sometimes beneficial for black; better for points, usually.]
;B[em]C[[KataGo variation.\]]
;W[fn]
;B[fm]
;W[gn]
;B[mj]
;W[oj]
;B[gm]
;W[hn]
;B[pk]
;W[dl]
;B[kg]
;W[no]
;B[je]
;W[jd]
;B[gf]
;W[di]
;B[cg]
;W[dm]
;B[bm]
;W[dg]
;B[ch]
))(;W[nk]C[If white ever adds a move, pushing on the right like this, it'll clean up the tension here.

[KataGo gives this move -8.9 pp for white.\]]
;B[jh]C[[KataGo variation.\]]
;W[no]
;B[kf]
;W[je]
;B[lk]
)(;W[jp]C[If white had a stone here...

[KataGo gives this move -8.5 pp for white.\]]
(;B[op]C[... I often play this as black...]
;W[np]
;B[jo]C[... and then play this attachment...]
;W[io]
;B[oq]
;W[or]
;B[nr]
;W[pr]
;B[kp]
;W[ko]
;B[jn]C[... aiming to combine with this kind of thing, I think.]
;W[lp]C[You might see something like this...]
;B[kq]
;W[jq]
(;B[lq]TR[lo]C[... and then you'll see white doesn't play the local move at M5 because there are some issues here.]
)(;B[kr]C[Apparently, even this is fine.]
;W[jr]C[If white defends...]
;B[lo]
;W[kn]
;B[no]C[... black's trying to combine these two somehow.]
;W[pp]
;B[oo]
;W[ln]
;B[mq]C[There's a squeeze-atari.]
;W[mp]
;B[mo]C[Kind of a cool sequence.]
))(;B[hd]C[[KataGo variation.\]]
;W[id]
;B[gd]
)))(;W[ob]C[If white takes...

[KataGo gives this move -12 pp for white.\]]
(;B[lb]
;W[na]
;B[me]SQ[kb]TR[lc]TR[ld]TR[le]C[... now, because the M17 stones have the threat from black of extending at L18...]
;W[oj]C[... for example, let's say white gets out...]
;B[kb]
(;W[qb]C[... if white jumps to save these stones...]
;B[kf]C[... then these are caught.]
;W[jd]
;B[kd]
;W[ke]
;B[je]
;W[kc]
;B[lf]C[There's a crane's nest.]
)(;W[kf]C[If white saves the stones...]
;B[qb]
;W[jd]TR[na]TR[mb]TR[ob]TR[nc]TR[oc]C[... then white's corner stones are gonna be in trouble later...]
;B[la]
;W[ma]
;B[pa]
;W[jb]TR[ma]TR[na]TR[mb]TR[ob]TR[nc]TR[oc]C[... potentially dying.]
))(;B[me]C[[KataGo variation.\]]
;W[oj]
;B[lb]
;W[na]
;B[kb]
;W[pk]
;B[qb]
;W[ql]
;B[je]
;W[mn]
;B[dn]
;W[ll]
;B[gf]
;W[ec]
;B[ed]
;W[dc]
)))(;B[me]SQ[pc]TR[nf]TR[og]TR[oh]TR[ph]TR[qh]TR[oi]C[If black connects, white will probably save her group, or extend at Q17.
Black doesn't want to play a zero-point move if possible.

[KataGo gives this move -3.3 pp for black.\]]
;W[pc]TR[nf]TR[og]TR[oh]TR[ph]TR[qh]TR[oi]C[Extend, huh? That means white's group can't be sealed in.]
(;B[nk]C[As white, I'd be worried about this one.]
;W[nj]
;B[mj]
;W[mi]
;B[ni]
;W[oj]
;B[ok]C[Something like this seems playable for white.]
;W[pk]C[This cut is dangerous for black.]
(;B[qk]
;W[mk]
;B[lj]
;W[pl]
;B[om]C[I'm not sure what's best for white here.]
(;W[ql]C[Turn, maybe?]
)(;W[ri]C[Just here directly...]
;B[qj]
;W[re]C[... and live? I see.
This sort of shape, I'm not the most comfortable with living. But I see this second-line large knight move shape a lot from AI.]
;B[qf]C[The typical issue is, if you get pressed flat like this...]
;W[rf]
;B[qg]
;W[rg]C[... it's not enough space to live locally...]
(;B[rd]
;W[qe]C[... but I think on this board, white's gonna cut.]
)(;B[qe]C[And if black plays here, I don't know?]
;W[li]
;B[kj]
;W[ql]
;B[rl]C[I guess we're gonna race the group?]
;W[ki]
;B[jj]
;W[kg]
;B[rd]C[We're just gonna race it. Eye versus no eye; all the liberties in the middle belong to white.
Okay, I can kind of see it. Hard to read, though.]
)))(;B[pl]C[[KataGo variation.\]]
;W[qk]
;B[qj]
;W[rk]
;B[ql]
;W[re]
;B[rd]
;W[rf]
;B[li]
;W[pf]
;B[qe]
;W[ri]
;B[sk]
;W[cr]
;B[kb]
;W[lb]
;B[je]
;W[rb]
))(;B[mj]C[Or this one. I guess this shape is similar.]
;W[oj]TR[ok]C[Similar idea. Black can't hane.]
;B[pk]C[White gets out like this.]
;W[ok]
;B[ol]TR[mk]C[If hane, I thought white N9 attach.]
;W[mi]C[I see this is better order.]
;B[ni]
;W[mk]
;B[lk]
;W[lj]
;B[nj]
;W[nk]C[Yeah, there's no way to seal white in.]
;B[ll]
;W[mm]C[Double ataris and stuff. Cool; playing that razor's edge super well.]
)))(;B[ph]TR[nf]C[O14 is saying that white doesn't care about R12...

[KataGo gives this move -3.3 pp for black.\]]
(;W[pg]
;B[qg]
;W[qf]C[... she just gives it up.]
)(;W[mg]C[[KataGo variation.\]]
;B[me]
;W[lg]
;B[kf]
;W[pg]
;B[ke]
;W[od]
;B[oe]
;W[kb]
;B[qf]
;W[jh]
;B[ig]
;W[qg]
;B[jb]
;W[qb]
;B[rb]
;W[pb]
;B[jg]
;W[gf]
;B[kh]
;W[rc]
;B[qc]
;W[ra]
;B[ne]
;W[oj]
;B[pk]
;W[lj]
))(;B[oh]C[If black wedges, all of that, too, focuses on the right side.

[KataGo gives this move -26 pp for black.\]]
;W[nh]
;B[ph]C[White still gives up everything, I guess.]
;W[mg]C[White just defends, huh?]
(;B[pg]C[And then if black plays here...]
;W[od]TR[qh]TR[rj]C[... white cuts. Huh.
It might feel really bad if you're reading this and you're, like, "Oh, but black got the right side!" But you have to remember that this was originally black's side.
If you compare it to the original position, actually, black solidified the top of the side; but white got super strong in the middle, and that's good for white. You might think about white losing the R12 stone, but that can be canceled out with the S10 stone, so overall, this is very good for white.]
)(;B[od]C[Black plays here...]
;W[qf]C[... and white plays here.]
)))(;W[ph]C[Obviously, if white blocks...

[KataGo gives this move -3.8 pp for white.\]]
;B[nh]C[... this becomes a thing again.]
;W[oh]C[This is miserable.]
;B[le]C[[KataGo variation.\]]
;W[pc]
;B[qc]
;W[ke]
;B[kf]
;W[je]
;B[nk]
;W[qf]
;B[mi]
;W[ri]
;B[pf]
;W[nj]
;B[mj]
;W[ok]
;B[oj]
;W[ni]
;B[qj]
;W[ng]
;B[mg]
;W[mh]
;B[lh]
))(;B[nh]TR[oj]C[If black peeps, the P10 push is also okay for white; she could come back.

[KataGo gives this move -7.9 pp for black.\]]
(;W[qf]C[Oh, here is the shape? That's odd, I'd be worried about getting surrounded.]
(;B[mj]C[I guess this shape is very thin for black, though.]
;W[mi]
;B[ni]
;W[oj]
;B[pk]C[Yeah, white has this kind of maneuver.]
;W[nj]
;B[li]
;W[nf]
;B[me]C[White makes all the forcing moves.]
;W[oh]
;B[mh]
;W[od]
;B[oe]C[White threatens the cut for later.]
;W[kb]C[White defends herself.]
;B[nl]TR[ne]C[There's no way to seal this, I guess.
I see; white races the corner with O15. Hmmm... that's hard to read.]
)(;B[le]C[[KataGo variation.\]]
;W[ke]
;B[kf]
;W[je]
;B[jf]
;W[ie]
;B[nk]
;W[oj]
;B[ok]
;W[mi]
;B[mj]
;W[pi]
;B[qj]
;W[lg]
))(;W[oh]C[If white connects, her shape's kind of heavy.]
)(;W[pi]C[This kind of thing. I guess the AI says it's fine, but no one wants to play this.]
)))(;W[ng]C[If white plays this side...

[KataGo gives this move -1.5 pp for white.\]]
(;B[le]TR[pc]C[... black gets out like this. If he does invest in attacking more because he didn't spend a move at Q17...]
;W[ke]
;B[kf]
;W[je]
(;B[oj]
;W[ni]C[... this is what's happening.]
;B[pg]TR[oh]SQ[ni]SQ[oj]C[This is the shape.
And you can notice that this peep would exist in the one-space jump variation, but then black wouldn't have the P10 push. I don't know if the push is that big a deal, though.]
)(;B[jf]C[[KataGo variation.\]]
;W[ie]
;B[oj]
;W[ni]
;B[pg]
;W[dn]
;B[cm]
;W[qi]
;B[qj]
;W[nj]
;B[hp]
;W[og]
;B[gq]
;W[fp]
;B[lh]
;W[li]
;B[ki]
;W[lj]
;B[el]
;W[cr]
;B[dh]
;W[lg]
;B[mg]
))(;B[pc]TR[oh]C[If black kicks, why is this so much worse for black than in the one-space jump variation?
I guess white's shape is more stable, so there's less value in attacking it; so black would rather take the corner points.]
;W[kf]C[Then white can attack from this side.]
;B[mg]C[And now it's true, if black separates white...]
;W[mh]
;B[lh]
;W[mi]C[... white's just making shape, and she's happy.]
;B[kg]
;W[nf]
;B[od]TR[nh]C[There's no value in black connecting like this because white has an eye; she's pretty stable.]
;W[cr]C[White takes a big point.]
)))(;B[pi]C[The question is always, what happens if black just pushes and cuts?

[KataGo gives this move -9.5 pp for black.\]]
;W[ph]
(;B[oh]C[I assume white just pushes a bunch.]
;W[og]
;B[nh]
;W[ng]
;B[mh]
;W[mg]
;B[lh]
;W[lg]
;B[kh]
;W[qf]C[And white defends.]
;B[pc]C[Black defends.]
;W[ob]C[White descends.]
;B[od]
;W[qb]
;B[md]
;W[ld]
;B[mc]
;W[mb]
;B[me]
;W[le]
;B[pb]C[All the normal things. Black's corner's under pressure.
Basically, white broke the side and as compensation, black got the center; but white got the extra bonus of bullying the corner, so this might be even.]
)(;B[nd]C[[KataGo variation.\]]
;W[nf]
;B[nc]
;W[oj]
;B[pk]
;W[nb]
;B[mb]
;W[pb]
;B[na]
))(;B[oj]TR[ne]TR[ni]C[Also worth considering what happens if black just pushes. I assume white would extend or play O15.

[KataGo gives this move -6.5 pp for black.\]]
(;W[ni]C[If it's me, extend is easy to play.]
)(;W[ne]TR[oi]TR[oj]C[I think O15 is better. The idea here is that now, white's separating. The marked exchange has helped her play the move she wanted.]
(;B[og]SQ[pf]SQ[oh]TR[oi]TR[oj]C[When black plays here after the exchange, he has some cut issues or some bump issues.]
;W[oh]C[White probably bumps.]
(;B[pg]C[If black goes down...]
;W[qi]C[... white has this peep, which is nice.]
)(;B[ng]C[If black goes up...]
;W[mi]C[... white's connected.]
))(;B[md]C[[KataGo variation.\]]
;W[ke]
;B[mc]
;W[oe]
;B[pc]
;W[ob]
;B[pg]
;W[ng]
;B[dn]
;W[cf]
;B[di]
;W[dh]
;B[ch]
;W[eh]
;B[ci]
;W[ef]
))))(;W[oh]C[If white just runs normally...

[KataGo gives this move -2.5 pp for white.\]]
;B[nd]C[... black normally leans on the strong side.]
;W[nc]
;B[md]
;W[ld]
;B[mf]
(;W[le]C[If white just defends everything...]
;B[mh]TR[rj]C[... black can use that to attack the group.
Black got profit on the right side and used white's weaknesses effectively; that's what S10 is saying.]
;W[ni]C[[KataGo variation.\]]
;B[jg]
;W[mi]
;B[je]
;W[me]
;B[nf]
;W[ne]
;B[pg]
)(;W[ni]C[White has to move out somehow. If she does it like this...]
(;B[pc]C[... black kicks...]
(;W[le]TR[kf]C[... and white plays here instead of L14...]
;B[ng]TR[me]C[... but it's a similar idea. This stone is on white's vital point, protecting the N15 cut. That's pretty annoying.]
;W[kg]TR[oh]TR[qh]TR[ni]C[It's interesting to me what kind of shape you use, and it's very clear that this is a weaker shape for white than the game. Good to know.]
)(;W[kf]
;B[mh]C[If black moves out, white's still kind of okay. It's not a big difference.]
))(;B[le]TR[oh]TR[qh]TR[ni]C[Black's not playing this because he's moving away from white; so white's not that weak, I guess?]
;W[ke]TR[ng]TR[oi]C[If white does the same thing as in the variation where her stones are at O13 and P11...]
;B[kf]
;W[je]
;B[pg]TR[oi]C[... ah, black can counter with this! I thought about that, but the shape would seem very flimsy if white had P11.]
;W[qi]
;B[qj]
;W[oj]C[So white's gonna play here, huh?]
;B[pi]
;W[ph]
;B[oi]C[If you're a weaker player, you might wonder, "Can't white's stones just get cut?"]
;W[nh]C[And the idea is, yeah...]
;B[nj]
;W[mj]
;B[ok]C[... but white just gives up the stone and is fine.]
;W[lg]
;B[lf]
;W[mc]C[And white protects everything, basically.]
;B[li]
(;W[nk]C[White ataris first.]
;B[oj]
;W[mi]C[This is what the shape is.]
)(;W[mi]C[Otherwise...]
;B[ji]SQ[nj]TR[nk]C[... if white ataris later, O10 is lighter. Black won't answer.
Interesting.]
))))(;W[ne]C[White can play this directly.

[KataGo gives this move -1.5 pp for white.\]]
(;B[oh]C[And I thought black would separate like this...]
)(;B[pg]C[... or here...]
)(;B[of]C[... or here.]
)(;B[nf]C[Even very crudely like this...]
;W[mf]
;B[of]
;W[mg]
;B[oh]C[... although apparently, this is good for white.]
)(;B[md]C[[KataGo variation.\]]
;W[ke]
;B[le]
;W[oe]
;B[kf]
;W[je]
;B[mc]
;W[pd]
;B[pc]
;W[od]
;B[qb]
;W[qe]
;B[re]
;W[pf]
;B[rf]
;W[pb]
;B[qc]
;W[lf]
;B[id]
;W[hd]
;B[ie]
;W[jf]
)))(;B[pc]C[The kick feels bad because white's already solid.

[KataGo gives this move -6.8 pp for black.\]]
(;W[od]C[White can answer...]
)(;W[ob]C[... or go down...]
)(;W[kd]C[... or, since white can use her strong shape to play this move later...]
)(;W[oh]C[... white kind of doesn't need to answer.]
;B[ob]SQ[jb]TR[kd]TR[le]C[L16 is pretty okay for white. Maybe M15 is better.
But apparently white doesn't play anything locally 'cause she still can connect at K18, and is going to counter-attack.]
)(;W[qk]C[[KataGo variation.\]]
;B[pp]
;W[qq]
;B[qj]
;W[rl]
;B[rj]
;W[rn]
;B[qm]
;W[rm]
;B[pk]
;W[oh]
;B[md]
)))(;W[dn]C[If you play the typical joseki...

[KataGo gives this move -0.5 pp for white.\]]
;B[cm]
(;W[kp]
;B[dm]C[... it's very hard for white to develop the bottom side.]
)(;W[el]
;B[jp]C[Some sort of reducing move is probably fine. I can see why black played away from the top side.]
)(;W[le]C[[KataGo variation.\]]
;B[mf]
;W[rl]
;B[ro]
;W[pl]
;B[qi]
;W[nl]
;B[mn]
;W[mp]
;B[mo]
;W[ko]
;B[jn]
;W[kn]
;B[lm]
;W[km]
;B[ll]
;W[rp]
;B[rm]
;W[so]
;B[rn]
;W[mi]
))(;W[kd]C[If white plays a move like this, she's sort of added a move too many, is my feeling. It's pretty bad.

[KataGo gives this move -6.8 pp for white.\]]
(;B[jf]
;W[ie]C[White has to add some more moves.]
;B[nd]
;W[nc]SQ[gc]TR[jc]SQ[jf]C[White's over-concentrated. Even though black's lost K17, he got the kick and a forcing move in the center. It's a little slow for white.]
)(;B[dn]TR[hb]TR[hc]TR[jc]TR[lc]SQ[oc]TR[kd]TR[he]MA[pe]C[Let's say black pushes.
One way of thinking about this is, white's formation on the top is slightly better for white because black lost a stone. But since white has an extra move at P17, even though it got exchanged for Q15, Q15 is clearly doing more than P17 in terms of development since white's group is already strong.
So white really doesn't want to add a move at L16 if she can help it.]
;W[qh]C[[KataGo variation.\]]
))(;W[le]C[If anything, white would rather jump, locally.

[KataGo gives this move -1.8 pp for white.\]]
;B[nd]C[[KataGo variation.\]]
;W[dn]
;B[cm]
;W[nc]
;B[mf]
;W[dm]
;B[md]
;W[ld]
;B[lf]
;W[kf]
))(;B[je]C[Black doesn't have to jump here.

[KataGo gives this move -4.2 pp for black.\]]
;W[dd]C[[KataGo variation.\]]
;B[cc]
;W[df]
;B[dc]
;W[le]
;B[jg]
;W[co]
;B[gf]
;W[jb]
;B[cj]
;W[dn]
;B[dm]
))(;B[hd]C[What happens if black plays the most intuitive move?

[KataGo gives this move -3.7 pp for black.\]]
;W[ic]
;B[id]
;W[jb]C[Black is sad because white breaks out; okay.]
;B[kb]C[[KataGo variation.\]]
;W[kc]
;B[jd]
;W[hb]
;B[ja]
;W[ib]
;B[mb]
;W[mc]
;B[lb]
;W[nb]
;B[nd]
;W[ma]
;B[nc]
;W[ka]
;B[cj]
;W[cn]
;B[gp]
;W[rl]
;B[rm]
;W[ql]
)(;B[je]C[What if black jumps?

[KataGo gives this move -0.9 pp for black.\]]
(;W[me]C[White defends.]
(;B[pc]C[Black kicks.]
;W[jb]C[If white plays here, black still has sente.]
;B[kb]
;W[kc]C[Basically, black doesn't have a real attack.]
)(;B[cn]SQ[lc]SQ[oc]TR[je]TR[me]C[The triangle exchange is probably good for white, because she's made her group stronger.]
;W[he]C[[KataGo variation.\]]
;B[gc]
;W[gb]
;B[fb]
;W[de]
;B[hb]
;W[ce]
;B[pc]
;W[co]
;B[ob]
;W[ib]
;B[ga]
;W[lg]
))(;W[he]TR[jc]TR[je]C[If white jumps, black's group is weaker than if black had done nothing.]
))(;B[id]C[This is the main local strong move.

[KataGo gives this move -2.5 pp for black.\]]
;W[me]TR[hd]C[We can see white goes here, and now I'd expect black to cover at H16...]
(;B[pc]
;W[hd]C[... because this sort of fighting is relatively complicated, but usually tends to be good for white.]
)(;B[hd]
;W[ec]C[Let's see what happens.]
;B[fc]
;W[fb]
;B[ed]
;W[dc]
;B[cc]
;W[cb]
;B[bb]TR[df]C[I think the status of what's happening here is that white has half life, so it's awkward for black to continue.
White is a move away from dying; but even if she dies, she's gained the D14 move, is kind of the idea.]
(;W[qb]C[If this is the move for white, she's already gained a little here...]
;B[cn]SQ[bb]SQ[cb]SQ[fb]TR[qb]SQ[cc]SQ[dc]SQ[ec]SQ[fc]SQ[ed]TR[me]C[... if black has to still come back here.
White got two moves in the upper right in exchange for neutral exchanges in the upper left, which would help white invade the right side.]
)(;W[ck]C[If white plays here...]
;B[gb]C[... black can't kill unless he plays a move inside...]
(;W[df]C[... but then white has moves like this.]
)(;W[gc]
;B[hb]
;W[df]C[Mainly this one, which will force black to add another move.]
))(;W[gc]C[If white plays first, she can probably live.]
;B[db]
;W[eb]
;B[ca]
;W[ic]
(;B[jb]C[Black would like to go down or something...]
(;W[gd]
;B[ge]
;W[jd]C[... but there are too many cutting points.]
)(;W[jd]C[Or cut directly.]
;B[kd]C[Black can't atari...]
;W[je]
(;B[gd]
;W[kc]C[... because of this one.]
)(;B[kc]
;W[gd]C[Yeah.]
)))(;B[jd]C[If black connects...]
;W[jb]C[... I assume white just lives.]
;B[kb]
;W[ja]
;B[kc]
;W[lb]C[White forces once...]
;B[ka]
;W[hb]C[... and lives.]
)))(;B[op]C[[KataGo variation.\]]
;W[mr]
;B[pc]
;W[hd]
;B[if]
;W[dd]
;B[cc]
;W[dc]
;B[de]
;W[cb]
))(;B[jj]C[AI is saying, literally everything is fine. Even tengen barely loses anything, so it's one of those kinds of positions.

[KataGo gives this move -6.1 pp for black.\]]
;W[he]C[[KataGo variation.\]]
;B[gc]
))(;W[cj]C[I assume if white plays on the left...

[KataGo gives this move -1.2 pp for white.\]]
;B[pc]C[... we'd see black kick. This is also probably totally playable for white, to be honest.]
(;W[mf]C[I've learned that this is a very key move. The idea is...]
;B[od]C[... if black follows up here...]
;W[hc]
(;B[id]TR[mf]C[... N14 seems to shut down this kind of idea...]
;W[hd]
;B[he]
;W[ie]
;B[je]
;W[if]
;B[ge]
;W[jf]
;B[ke]
;W[kf]
;B[le]
;W[me]TR[mf]C[... because N14 just perfectly lines up to block and squeeze the black stones.]
)(;B[hd]C[If black plays something like this...]
;W[gc]
;B[id]
;W[ec]C[... some stuff in the corner is playable.]
)(;B[je]TR[jb]C[If black jumps, white has obviously the attach underneath; she could play corner stuff, too.]
))(;W[me]C[I believe this is a similar idea, from when I've studied this before.]
)(;W[hc]C[... or sometimes invade directly.]
)(;W[ob]C[[KataGo variation.\]]
;B[cg]
;W[ne]
;B[cn]
;W[cl]
;B[bp]
;W[cq]
;B[do]
;W[qh]
;B[pg]
;W[qk]
;B[pk]
;W[qj]
)))(;B[dj]C[If black plays an extension...

[KataGo gives this move -0.5 pp for black.\]]
(;W[cl]C[... white's happy to extend from the corner, because even though black covers more space, white's more solid...]
;B[dh]C[... and it's hard for black to add another move without being over-concentrated.]
)(;W[qh]C[[KataGo variation.\]]
;B[jc]
;W[qf]
;B[rj]
;W[oi]
;B[nd]
;W[nc]
;B[md]
;W[ld]
;B[mf]
;W[oj]
;B[pc]
))(;B[cn]C[If black goes farther...

[KataGo gives this move -0.2 pp for black.\]]
(;W[ck]SQ[cd]SQ[fd]TR[cn]C[... I assume pincer; then C6 is actually hard to take care of while actually expanding from the upper left.]
;B[ch]C[[KataGo variation.\]]
;W[di]
;B[dh]
;W[fi]
;B[eh]
;W[dc]
;B[cc]
;W[dd]
;B[ic]
;W[de]
;B[bf]
;W[cb]
;B[bb]
;W[eb]
;B[gc]
;W[fe]
;B[ge]
;W[ff]
)(;W[hc]C[One way of thinking about this is, if white plays here...]
;B[jc]C[... and black invades, we get to the same position as the game. Also pretty reasonable sequence, I think.]
)))(;W[hc]TR[lc]C[This ends up being kind of over-concentrated and flat with the M17 move.

[KataGo gives this move -2.3 pp for white.\]]
;B[nd]C[[KataGo variation.\]]
;W[nc]
;B[md]
;W[ld]
;B[cn]
;W[cj]
;B[cq]
;W[cp]
;B[dq]
;W[ep]
;B[bp]
)(;W[cn]C[I think most human players would probably play this direction, but this is one of those things that have kind of changed with AI.
If white makes the space on the left smaller...

[KataGo gives this move -0.4 pp for white.\]]
;B[dm]C[... when black shoulder-hits, it's a little harder for white.]
(;W[dj]C[White's reduced the space which she could pincer in, basically. It's a choice. I don't think it's a big deal.]
)(;W[df]C[[KataGo variation.\]]
;B[jc]
;W[hc]
;B[ee]
;W[di]
;B[id]
;W[ge]
;B[ef]
)))(;B[qo]C[If black played something like this...

[KataGo gives this move -0.2 percentage points winrate (pp) for black.\]]
(;W[op]
(;B[ql]
;W[pk]C[... it's a little easy for white to reduce later with the shoulder hit.]
;B[pl]
;W[ok]
;B[rj]
)(;B[pk]TR[op]C[If black plays high when there's a stone at P4...]
(;W[pl]
;B[ql]
;W[qm]C[... there are some issues with attachments...]
)(;W[qi]C[... some issues with invasions. It's a game.]
)))(;W[np]C[[KataGo variation.\]]
;B[pk]
;W[cn]
;B[lq]
;W[qp]
;B[po]
;W[mq]
;B[lp]
;W[nn]
;B[gq]
;W[qi]
;B[rk]
;W[oj]
;B[ok]
;W[qf]
;B[dm]
;W[cm]
;B[pf]
;W[qg]
;B[dk]
;W[rc]
;B[md]
;W[rd]
;B[mc]
)))