(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Chinese]SZ[19]KM[7.50]
PW[Lee Sedol]PB[Yamashita Keigo ]WR[9d]BR[9d]DT[2011-12-14]EV[1st Sports Accord World Mind Games ]RO[Round 5]WT[Korea ]BT[Japan]SO[http://gogameguru.com/]AN[An Younggil 8p]C[This game is from the final (5th) round of the 1st Sports Accord World Mind Games. It's between Yamashita Keigo and Lee Sedol.

Initial commentary (without prefix) by An Youngil 8p when this game was played in 2011.
New commentary by Uberdude 4d (with U prefix to make clear if not already from mention of LZ and percentages) using Leela Zero 40 blocks.]RE[W+1.50]
;B[pd]C[Lee Sedol is currently ranked number one in Korea, and Yamashita currently holds the Honinbo and Meijin titles in Japan.

U: LZ 40b thinks black starts with 46.5% win with the 7.5 komi]
;W[dp]C[This tournament is brand new, and six teams participated in the competition.
]
;B[pq]C[The six teams were America, China, the European Union, Japan, Korea and Taiwan.
]
;W[dd]C[After round 4, Korea and Japan were tied at 3-1 each. China swept all rounds, so this Japan vs Korea match was the decider for the silver medal.]
(;B[qk]C[This is the third time Lee and Yamashita have played. Lee won their last two games in 2005 and 2010.

U: Chinese opening was very popular back then, but isn't played much these days, probably influenced by bot's dislike of it (and just fashions change). LZ 40b thinks it only loses 0.9%, and AlphaGo Teach only 0.6%, but Elf v1 thinks it loses a whopping 6%. Bots stress the importance of enclosing or approaching a 3-4 stone in the early opening, corners before sides like we teach the DDKs!]
(;W[mq]C[Anyway, B starts with Chinese opening, and W approaches on the lower side. 

U: In the last few years (and before strong bots) o17 has been the most common continuation, and LZ agrees it's better. AG thinks all white moves in the lower right area are bad (humans have tried pretty much all outside approaches/extensions from k3/4 to o3/4. LZ doesn't even consider them but if played doesn't like them. f3 is not so bad, and is a move Gu Li 9p liked to play. ]
;B[po]
(;W[jq]C[This is one possible way of playing against the Chinese opening.]
(;B[cn]C[U: Once white adds the side extension from 4-4 at k3, it is a very natural human move to approach on the other side. LZ thinks a fine move but prefers o17.]
(;W[fp]C[LZ doesn't even consider this very normal human move (25 of 28 games in waltheri played here), -1.5%.]
(;B[cf]LB[ck:B][bp:A]C[This opening is rare. A or B instead is more common for B. 

U: LZ doesn't even consider A or B and thinks both -3% (likes tenuki to r17 next). I like it's #1 of k4 attach. ]
(;W[di]LB[cj:A][dj:B]C[Some people wondered why W doesn't pincer at A or B which are supposed to be right according to text books. You can have a look at the variations.

U: LZ would just back off to f17, maybe because black has no good way to complete the left side so no need to disrupt it? Bots don't seem to be impressed by the black 3 space extension to d10. All 3 pincers are within 1% of f17 though.

]
;B[fc]
(;W[df]C[LZ's intuition was the other attach, but after 10k playouts it wants to play Bao Yun's favourite knight move cap]
(;B[dg]C[LZ agrees with hane first, a locally bad joseki but because black wants sente he makes his follow up if white tenukis bigger.]
;W[ef]
;B[cc]LB[cc:2][dg:1]C[Exchanging 1 and then playing 2 is generally considered bad these days. It's now more common to omit 1 and just play 2 directly. However, this opening is different...

U: LZ agrees 3-3 best, might seem a bit surprising as with double approach it usually likes c16, but here white already has d11 pincer so that fighting is not so favourable and a quick settle in sente is preferable.]
;W[ce]
;B[dc]
(;W[co]C[This move is typical of Lee Sedol.

U: LZ says -5% biggest mistake of the game so far. But Lee Sedol's mistakes usually lead to fighting in which it is easy to make bigger mistakes against his strong fighting skills.]
;B[cg]C[B has to fight here as W played elsewhere.

LZ agrees]
;W[be]
;B[eg]
(;W[ff]C[U: No comment from Younggil, but LZ says this is a fairly significant mistake in shape that will have quite some influence on the fighting to come. It wants to hane, but with preparation. -2%

As this corner is a fairly common shape (of course rest of board matters, particularly c6 area, but let's look at local shape), I checked pro games in waltheri, extend is most common with 28/37.]
;B[fg]
;W[gf]
(;B[fi]C[Up to here, the opening seems to be better for B. 

LZ agrees, black 59% now. But it thinks f11 was not the best, that's either g13 push or h17 extend for 61%.]
(;W[hc]C[LZ fluctuates over if g17 attach is slightly better]
(;B[hd]C[Good move. B should go out here to separate W. 

LZ agrees, but thinks h18 is also good/better
]
;W[id]
(;B[he]C[LZ's instinct is to pull back but this good too.]
;W[gh]C[Good sense. Trying to get a rhythm. 

LZ agrees, all other moves worse and the players play the same as LZ for the next 10 moves.]
(;B[ie]C[Right move. ]
(;W[gg]C[This is right as W can't fight properly around here otherwise.]
;B[ei]
;W[gc]
;B[fd]
;W[jd]C[W is busy and the opening is successful for B. ]
;B[je]
;W[kd]
;B[hj]
(;W[jg]TR[gf][gg][gh]C[U: Reviewing the game myself, I suspected this was bad as although it's the classic good shape of 2 space jump from 3 stones haengma, there is a black wall closeby at k15 so I'd want to play a bit further down, e.g k12 or maybe j11 or j12 be better? And LZ agrees though this is barely a minus.]
;B[ke]C[LZ agrees]
;W[ld]
(;B[le]C[U: But this push it slightly prefers at d6]
(;W[md]
(;B[ji]C[B takes the intiative in the game. 

LZ still thinks d6 is biggest]
(;W[bc]C[LZ did consider this move, but thinks it loses 4%.]
;B[bb]
;W[ab]C[What a tesuji! W'd be in deep trouble without this move. ]
;B[bd]
;W[ad]
;B[ac]
;W[fh]
;B[eh]
;W[bc]
;B[ib]
;W[ic]
;B[ac]
;W[gi]
;B[ae]LB[gj:A]C[B really wants to answer at A, but there's no following ko threat for B.]
;W[gj]C[W successfully comes out, but the game is still good for B. ]
;B[dn]
;W[ek]
;B[ck]C[W's center group is still weak, so it's hard for W to develop his lower side. ]
;W[hk]C[Right move. W can't fight properly without this reinforcement. ]
;B[fm]
;W[lg]
;B[ig]
;W[ih]
;B[kg]
;W[kh]
;B[jh]
;W[kf]
;B[ii]C[Yamashita plays very well when he takes the lead in the game. ]
;W[if]
;B[hh]
;W[hg]
;B[jf]C[Another ko fight. Actually, in this ko there's 'nothing to lose' for B. ]
;W[ih]
;B[eq]C[W can't answer this as W doesn't have any big ko threats. ]
;W[hi]
;B[ep]C[It was W's largest area, but it's destroyed now. ]
;W[dq]
;B[er]
;W[dr]
;B[do]
;W[bo]
;B[bn]
;W[br]
;B[lf]C[B is ahead by quite a lot.]
;W[qd]C[W is desperate. It's very hard for W to catch up with ordinary moves. ]
;B[qc]
;W[qe]
;B[pe]
;W[rc]
;B[pc]
;W[rb]LB[qg:A]C[Jumping at A is normal for W, but then B'd be happy to just play at 98. ]
;B[qf]C[It's still good enough for B. ]
;W[rf]
;B[rg]
;W[qg]
;B[pf]
;W[re]
;B[kg]
;W[af]
;B[dj]
;W[kf]
;B[rh]C[It's good enough for B. The game is simple, so it's hard for W to make anything happen. ]
;W[kg]C[Even though the game is almost hopeless for W, he has to patiently connect here and wait for a chance later.]
;B[nf]C[Thick and safe. Yamashita's play so far was practically perfect. ]
;W[qi]C[A probing move. ]
;B[mb]
;W[lb]
;B[mc]
;W[lc]
(;B[qh]LB[pl:A]C[This is no bad, but A would be proper. ]
;W[qm]C[Good invasion. W gets a good chance to catch up for the first time in the game.]
(;B[om]LB[qh:B][qi:A][qm:C]C[The exchange of A-B is useful to help C run away. ]
;W[pl]
;B[nk]C[B is still ahead, but the game is getting messy, and this is not a good sign for B. ]
;W[pk]
;B[qj]
;W[pj]
;B[ri]
;W[nj]
;B[mj]
;W[ni]C[While W is coming out, B doesn't gain any profit from attacking. ]
;B[pi]LB[mk:A]C[Questionable again. It'd be better to connect at A. ]
;W[nl]C[It's perfect timing for a counter attack. ]
;B[ol]
;W[ok]
;B[mk]
;W[on]C[Lee eventually catches up in the game after this.]
(;B[nm]
;W[pn]C[As W disconnects B, the game becomes even more complicated.]
;B[nn]
;W[oo]
;B[qo]
;W[oq]
;B[pr]C[So far, the result is very successful for W. W even takes sente. ]
;W[fn]C[A probing move. ]
;B[pm]C[B tries to cut W to get a chance, but it's a bit too late. ]
;W[ql]
;B[qn]
;W[mi]
;B[ln]LB[op:A]C[B can't atari A because B's center group is not settled yet. ]
;W[op]C[The game is still very close, but the mood is as if the game's already reversed. ]
;B[jk]C[You can imagine how much B was leading by before W came into the right side. ]
;W[kj]LB[li:A]C[Good answer. If W doesn't play here, B'd play A and make a hanging connection in sente. ]
;B[jo]C[So B keeps looking after his center group. ]
;W[hq]
;B[gp]LB[eo:A]C[Good. It's more active than at A. ]
;W[lj]C[Calm and nice. ]
;B[ll]
;W[or]C[Sente. ]
;B[rn]
;W[kl]LB[jl:A][km:B]C[Good attachment. If B answers at A, W'd go out at B. ]
;B[km]
;W[pp]
;B[qp]
;W[rm]
;B[rr]
;W[ad]
;B[ao]
;W[bp]
;B[bc]
(;W[lk]C[Accurate move order. ]
;B[ml]
;W[jl]C[W swallows B's center stones. At the same time, the game's reversed. ]
;B[qb]LB[kl:A]C[As a result, A should be the winning move. ]
;W[ra]C[It's very unfortunate for B because there're not many places have left to catch up. ]
;B[fb]
;W[jb]
;B[il]
;W[ik]
;B[jm]
;W[kk]
;B[gq]
;W[hp]
;B[gb]
;W[hb]
;B[go]
;W[qq]
;B[qr]
;W[hr]C[The game becomes simple again, but it's not good news for B this time. ]
;B[bf]
;W[em]C[Now W is trying to clean the game up and keep things simple.]
;B[fl]
;W[gn]
;B[lp]
;W[lq]
;B[el]
;W[ho]
;B[eo]
;W[ae]C[Lee's counting is very accurate. He must've been sure that W doesn't need to fight this ko.

The game is still very close, but they both sense that W is winning by a little. ]
;B[ag]
;W[fk]
;B[dl]
;W[sn]
;B[so]
;W[sm]
;B[rp]
;W[rk]
;B[oi]
;W[oj]
;B[nh]
;W[mh]
;B[kp]
;W[kq]
;B[in]
;W[hn]
;B[ng]
;W[nc]
;B[nb]
;W[ob]C[Right endgame. ]
;B[oc]
;W[nd]
;B[oa]
;W[en]C[The endgame in this game is relatively simple and easy (for pros) compared to other normal games. ]
;B[rj]
;W[dk]
;B[cj]
;W[dm]
;B[cm]
;W[sj]
;B[mp]
;W[gr]
;B[os]
;W[ns]
;B[ps]
;W[nq]
;B[ed]
;W[no]
;B[mo]
;W[fo]
;B[fq]
;W[hl]
;B[im]
;W[ap]
;B[an]
;W[ma]
;B[pb]
;W[oe]
;B[of]
;W[jp]
;B[hf]
;W[ig]
;B[io]
;W[ip]
;B[si]
;W[sk]
;B[sf]
;W[se]
;B[sg]
;W[ga]
;B[fa]
;W[ha]
;B[ej]
;W[qa]
;B[ne]
;W[od]
;B[fs]
;W[gs]
;B[ds]
;W[cs]
;B[fj]
;W[gk]
;B[na]
;W[la]
;B[pa]
;W[fr]
;B[es]
;W[mg]
;B[cl]LB[kg:C][hi:B][hk:A][ep:E][eq:D]C[W won 1.5 points. 

Even though he was behind after the opening, Lee Sedol didn't miss his chances and eventually reversed the game. He showed us his patience with A, B and C, and he played perfectly after taking the lead in the game. 

On the other hand, Yamashita had a good start in the early stages of the game. It looked like he couldn't lose the game after D and E, but he made some questionable moves on the right side, and Lee seized the opportunity. 

I hope you enjoy this dynamic game, and if you have any questions, please feel free to leave a comment.

In the end, China swept the field in 1st Sports Accord World Mind Games, winning the gold medal. Korea claimed the silver medal and the bronze medal went to Japan.

Thanks, 

An Younggil 8p
http://gogameguru.com/])
(;W[jl]C[This move looks alright, but ]
;B[kk]
;W[lk]
;B[il]
;W[ml]
;B[jm]C[B'd trade like this, and this is not as good for W as the actual game. ]))
(;B[pn]C[B can't fight like this. ]
;W[pm]
;B[nm]
;W[ml]C[Because B's center stones are in trouble. ]))
(;B[pl]C[If B plays here, ]
;W[qp]
;B[pp]
;W[qo]
;B[qq]
;W[pm]
;B[om]
;W[rk]
;B[rj]
;W[rl]LB[qi:A]C[W A is working very well. ]
;B[qj]
;W[rn]C[W can easily live inside. ]))
(;B[pl]LB[qh:A][ri:B]C[B can secure the right side with this, (A and B are miai now) and the game is clearly good for B. ]))
(;W[jh]C[U: It's painful to fix the connection with this bump which strengthens black outside, but LZ says it's best. I guess Lee doesn't want to strengthen his opponent like this to keep options for later fighting.]
;B[ki]
;W[lg]
;B[mf]))
(;B[lg]C[Locally LZ prefers this]
;W[ii]))
(;W[nc]C[LZ thinks this 3% better answer, not so good for the centre but better for territory and approaching corner.]))
(;B[dn]
;W[lg]
;B[gd]C[Probably this feels too pathetic for a human with fighting spirit.]))
(;W[ih]C[LZ thinks this solid jump is best, felt a bit slow to Lee perhaps?]
(;B[gd]C[it thinks black would defend, which surprises me])
(;B[ji]C[I don't know Yamashita's plan, but If I were white I'd worry about black getting ahead like this, but LZ says it's bad, following is me as example black thinking the centre pushing battle is important vs LZ saying it's not.]
;W[jh]
;B[ki]
;W[ke]
;B[gd]
;W[kh]
(;B[li]
;W[dk]
;B[fk]
;W[dn]C[now the left side became white (almost) territory]
;B[mg]
;W[kf]C[white is now 57%, I've managed to lose 15% in under 15 moves! That's not really so surprising though as the black wall at k11 isn't so valuable with white at k3 and n3, white connected upper groups and got the left side. Black has a moyo on the right but LZ can reduce that well.])
(;B[dn]C[LZ would here, I forgot to look at big picture]
;W[li]
;B[fn]C[m11 not so big])))
(;W[jh]
;B[gd]
;W[dk]
;B[fk]
;W[dn]
;B[mc]))
(;W[fh]C[This move doesn't work. ]
(;B[ci]C[Good response. ]
;W[cj]
;B[gg]C[Right order.]
;W[hg]
;B[ei]C[Good sequence. ]
;W[eh]
;B[dh]
;W[dj]
;B[hh]
;W[gi]
;B[hf]
;W[ig]
;B[ih]LB[jg:A][gj:B][mq:C]C[A and B are miai. C can't break the ladder for white. ])
(;B[eh]C[If B just blocks here...]
;W[ei]
;B[gg]
;W[hg]
;B[hh]
;W[gi]
;B[hf]
;W[ig]
;B[bi]
;W[bh]
;B[ch]
;W[ci]
;B[bg]
;W[bj]
;B[ah]
;W[ck]C[B is in trouble, so black shouldn't play this way.])))
(;B[gg]
;W[hf]
;B[ie]
;W[hg]
;B[ei]
(;W[jd]C[This is what W wants, so B shouldn't play like this. 

LZ agrees except for this last move, which did puzzle me, isn't g17 double sente first, and LZ agrees g17 first and then black lost 3%.])
(;W[gc]
;B[fd]
;W[jd])))
(;B[gd]
;W[ie]
;B[ic]
;W[jc]
;B[ib]
;W[dk]
;B[hh]
;W[ig]))
(;B[hb]
(;W[gb]
;B[gc]
;W[ib]
;B[hd]
;W[ic]
;B[fb]
;W[ie]
;B[hh]
;W[dk])
(;W[ib]
;B[gb]C[Although white is on the outside, black fixed the e18 weakness and white still has a cut])))
(;W[gc]
;B[gb]C[Because black doesn't have the g13 stone it's better to just hane under now (the black jump to j13 in previous g17 variation no londer exists).]
;W[hb]
;B[fb])
(;W[hh]C[LZ also likes here]))
(;B[gg]
;W[gc]C[Tight shape, more foreceful than just h17 because thne black would h14 hane, but being a contact move that's more costly now.]
(;B[gb]
;W[hb]
;B[fb]
;W[hg]
;B[hh]
;W[ih]
;B[hi])
(;B[gd]C[But after 20k thinks black can resist and this is 3$ better than g18, did white overplay?]
;W[fd]
;B[ed]
;W[hd]
;B[fe]
;W[ge]
;B[gb]
;W[fd]
;B[ee]
;W[hc]
;B[ec]
;W[de]
;B[hb]
;W[bh]
;B[ig]
;W[jc]))
(;B[hc]))
(;W[ed]C[LZ says this is sente, would Lee worry about tenuki? 2 pro games with this, from Rin Kaiho in the 1980s.]
(;B[gb]C[or maybe he didn't want to loose the option of h17 aiming at e18.]
;W[fg]C[But being able to hane here, combining with d11 for the eye-stealing shape is pleasing.]
;B[fh]
;W[eh]
(;B[bi]C[LZ mainline]
;W[ci]
;B[bo]
;W[bp]
;B[bj]
;W[bh]
;B[ck]
;W[gh]
;B[fi]
;W[bg]
;B[bn]
;W[gi]
;B[nc])
(;B[ff]C[Otake played this (with g18 at g17), which LZ only consider a little, but when played likes 1% more than b11. Well done Otake!]
;W[gg]
;B[ci]
;W[fi]
;B[cj]
;W[ge]C[LZ would then play the same sequence as Otake/Run]))
(;B[gc]C[Otake and Hashimoto answered here, LZ says 5% mistake, presumably because of aji like h17 and more ko threats.])))
(;W[bf]LB[eb:B][hc:A][ef:2][dg:1]C[Locally the result up to here is good for W. This variation used to be a joseki, but it's not anymore. Now this result is considered too good for white and white can play A (aiming at B) later, because of the 1-2 exchange.

However, W doesn't play at 20 in the game, because...

U: Interestingly LZ doesn't want to defend here, but c13 cut, which we always thought was bad in this joseki because...]
;B[bp]LB[ck:A][cq:B]C[If white plays another move in the top left this move becomes very good.

A and B are miai next.

LZ would k4 instead, and locally speaking prefers the c4 attach, as bots tend to.]
;W[cm]
(;B[bm]
;W[co]
;B[cl]
;W[bo]
;B[bn])
(;B[cl]C[Nice!]
;W[dm]
;B[bm]
;W[bn]
;B[bo]
;W[bl]
;B[an]
;W[ck]C[White's left side rather overconcentrated (black b4 not great either!). Avoiding white techniques like the c7 attach is one advantage of the c4 attach over the b4 slide. White has fewer strategic choices to make black's stones look bad.]))
(;W[cg]
;B[ch]C[Later black can blight d11 and separate it, but LZ probably sees that as making a heavy black group so doesn't fear it.]
;W[bf]
;B[dh])
(;W[eg]C[LZ also likes this, which is another human defence for when you want to emphasise the centre.]))
(;B[cc]C[U: If 3-3 directly]
(;W[dc]
;B[cd]
;W[de]
;B[bg]
;W[cg]
;B[bf]
(;W[ic])
(;W[ch]))
(;W[ce]
;B[dc]
;W[co]C[white would take sente]
(;B[cg]C[black has this follow up (LZ thinks o17 is better now)]
;W[dg]
;B[be]
;W[ch]
;B[nc]
;W[gl]C[interesting centre move!])
(;B[nc]
;W[cg]
;B[dn]
;W[dl]
;B[gn]))
(;W[cg]C[flexible move that LZ favours after >25k playouts]
;B[dc]
;W[co])))
(;W[ef]C[What is this meaning of this?]
(;B[cc]C[LZ says taking corner not good]
;W[cd]
;B[dc]
;W[ed]
;B[gb]
;W[co]C[white gets nice left side position and sente to kick here (or r17 invasion)])
(;B[jp]C[LZ wants to k4 again, it really likes this point!]
;W[kp]
;B[iq]
;W[ko]
;B[ck]
;W[cc]
(;B[ic]C[A natural flow, white taking corner means neither approach stone can dodge there to settle, so black extends from f17]
;W[bi]
;B[bp]C[black prevents c5 kick attack which would be powerful with b11 present])
(;B[bi]C[this is also good]
;W[ic]C[so white naturally pincers the top side]
;B[ge]
;W[ie]
;B[gg]))
(;B[cd]
;W[cc]
;B[dc]C[Attach and crosscut is a sort-of-joseki, and Daniel Hu played it against me in the British championship last year when I chose Bao Yun's move.]
;W[ec]
;B[db]
;W[ce]
(;B[de]C[LZ wants ko lock]
;W[bd]
;B[ed]
(;W[df]
;B[cd]
;W[be]C[White 52%, black k4 next.])
(;W[cd]C[Although white can connect, LZ thinks better not to, presumably because black can then force more in centre.]
;B[ee]
;W[df]
;B[ff]
;W[cg]
;B[fg]))
(;B[bd]C[The whole board position was different (but similar in that white wanted to develop the left side), but Daniel played here and it is a normal move]
;W[eb]
;B[cb]
;W[be]
;B[de]
;W[ed]
;B[bf]
;W[bc]
;B[ae]
;W[bb]
;B[ee]
;W[fe]
;B[fd]
;W[df]
;B[ce]
;W[fb]
;B[gb]
;W[gc]C[In that game played here which was terrible]))))
(;W[dj]C[If W pincers here, ]
(;B[fc]C[The double approach here is good. 

U: LZ thinks high is better, but let's first see what it thinks of this human knowledge]
(;W[df]C[but LZ says this fine too]
;B[dg]
;W[ef]
;B[cd]C[This is a proper move in this case. 

U: LZ agrees c15 would be bad]
(;W[ce]C[but LZ would never wedge here, -6%, this shape has pretty much disappeared from strong play now (and was already considered dubious by some before strong bots). It gives black a good shape with the tiger mouth and e14 ends up as an empty triangle that would be better at e13.]
;B[be]
;W[de]
;B[bg]
;W[cc]
;B[bd]
(;W[eg]LB[ef:A][dh:C][dj:B]C[U: making sense of d10 by connecting here is normal, but white is rather inefficient, if e13 is in place already then A or B would be better at C for example]
;B[dh]
;W[eh]LB[ef:A][di:C][dj:B]C[U: A/B would be better at C]
(;B[jd]LB[cn:A]C[B is happy with this result. The stone at A is still light. 

U: LZ agrees black is good here with 58%])
(;B[jp]C[but here even better with 60%]))
(;W[ic]C[If W pincers here, 

LZ -2%]
;B[eg]C[LZ agrees, or d17]
;W[ec]
(;B[bp]
(;W[cq]C[LZ says white shouldn't 3-3. -4%, and it seems not so hard to imagine c3 for d8 exchange helps black more.]
;B[dl]C[This variation is still playable for B. 

LZ 60% for B: good not playable.])
(;W[cm]C[U: LZ says here best, white will not follow black's plan. We often saw this attach with the d10 stone at k4 with an early approach then tenuki Chinese opening in recent years.]))
(;B[jp]C[again LZ wants this attach])
(;B[cp]C[LZ locally this]
;W[cq]
;B[bq]
;W[co]
;B[bp]
;W[do]
;B[bo]
;W[fg]
;B[fh]
;W[gg]
;B[dn])
(;B[eo]
;W[ep]
;B[bp]C[or this]))
(;W[ec]C[LZ's best]))
(;W[cc]C[LZ's best for both...]
;B[ce]
;W[dc]
;B[ch]C[U: d10 is not in a great position now, often happens with this loose pincer.]
;W[gd]
;B[fd]
;W[ge]
;B[hc]
;W[eb]
;B[fb]
;W[kd]C[U: a pretty wacky move]
;B[id]
;W[ie]
;B[kc]
;W[ci]))
(;W[fd]C[LZ would attach here, which is following the old (like 70s Japanese books) theory to attach to the non-pincered approach stone, to lean and build power to attack the pincered one. The more modern theory is to attach to the pincered stone (usually the pincer is closer) to emphasise connectivity and good shape]))
(;B[cc]C[This one is too normal. 

LZ only -1%]
;W[cd]
;B[dc]
;W[ed]
;B[bd]
;W[be]
;B[bc]
(;W[ce]C[LZ thinks white shouldn't connect! Actually this makes more sense than the craziness it appears: with the loose pincer often the wall can come under attack, so maybe connecting is heavy and you don't actually want to give black the f17 stone.]
;B[fc]
;W[co]C[This is what W wants. 

U: LZ thinks black is slightly better, 51.5%, when he begins action with c14 (revealing heaviness of c15 move)]
(;B[ef])
(;B[ch]))
(;W[co]C[LZ kicks directly, 2% better.]
;B[ce]C[And if black cuts (best move at 3k playouts)]
;W[cg]C[kikashi]
;B[bf]
;W[qc]
;B[qd]
;W[pc]C[U: One good thing about not exchanging c15 for f17 is white could have more potential on the top side, for example if black double hanes.]
(;B[nc]
;W[oc]
;B[od]
;W[nb]
;B[mc]
;W[mb]
;B[lc]
;W[eg]C[e16 stones can be sacrificed, but can still be useful])
(;B[oc]
;W[ob]
;B[nb]
;W[nc]
;B[od]
;W[mb]
;B[pb]
;W[na]
;B[qb]
;W[rc]C[bots like to play this early]
;B[rb]
;W[nd]C[White's not going to e17 for a long time, but black not having f17 makes this direction more pleasing for white (53%).])))
(;B[fd]C[LZ mainline]
;W[fe]
;B[ge]
;W[ff]C[e15 is more normal for humans.]
;B[gf]
;W[fg]
;B[gc]
;W[gg]C[U: not a sequence I've ever seen before.]))
(;W[cj]C[If W takes this lower pincer, ]
;B[fc]C[B'd still go here. 

U: LZ thinks high slightly better, but k4 best.]
(;W[df]C[LZ would play other attach, but thinks this one's not bad]
;B[dg]
;W[ef]
;B[cd]
;W[cc]C[U: Youngil doesn't c15 here, because c10 is low so white doesn't want sente for the e13 connection over the top. Important distinction between the low and high pincers.]
;B[ce]
(;W[db]C[LZ would solid connect, this hanging -3%. When bots started always playing solid connect in this shape I saw some pros (e.g. Jennie Shen) comment how weird it was, but I'd been playing solid connect before the bots came along. I was vaguely aware of this shape but was never comfortable with the d15 weakness (and maybe the pro theory that this was better, if indeed that was widespread, hadn't filtered through to us Western amateurs) so had dismissed this as a hard fancy move to play when I was stronger. The theory was black won't play d15 beause it damages the f17 stone, and the plus is d18 is better for eyes in the corner.]
(;B[ch]LB[cj:A]C[This result is acceptable for B. W hasn't yet gained anything from A. 

U: LZ says this is soft, a missed oportunity to punish d18.]
;W[ed]
;B[fh]
;W[ej])
(;B[de]C[but LZ just charges through with the crude play we were told not to be afraid of, and says this is good for black! 55%.]
;W[ed]
;B[ee]
;W[fd]
;B[ff]
;W[hd]
;B[jp]
;W[iq]
;B[kp]
;W[kq]
;B[eo]
;W[ep]
;B[cl]C[c10 weak now with f14 power.]
(;W[ej]
;B[bp])
(;W[co]
;B[bo]
;W[bp]
;B[do]
;W[cp]
;B[ek])))
(;W[dc]
;B[ch]
;W[gd]))
(;W[fd]
;B[gd]
;W[fe]
;B[cc]
;W[ec]
;B[cd]
;W[gc]C[LZ follows this joseki]
;B[cp]C[Black gets sente to settle here, is c10 a bit misplaced? Probably, LZ gives black 52%.]))
(;W[fc]C[A week after this game. Lee Changho just answered at 12 as white. ]
(;B[dj]LB[ch:A][di:C][dk:D][cl:B]C[Lee Sedol (playing black) played here. This seems to be better for B, but the game is still even. There're some weaknesses on B's left side (e.g. A-D).

U: LZ says -2%]
;W[qc]C[LZ would just 3-3]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
;B[od]
;W[nb]
;B[mc]C[not so often LZ says black gote here is best, maybe because right side is wide?]
;W[mb]
;B[lc]
(;W[nj]C[an instructive reduction, don't need to go deeper])
(;W[pj]C[classic shoulder hit reduction only a tiny bit worse though says LZ]
;B[pk]
;W[oj]
;B[ok]
;W[nj]
;B[ri]
;W[nk]))
(;B[jp]C[LZ line]
;W[iq]
;B[kp]
;W[kq]
;B[cd]
;W[cc]
;B[bc]C[bot favourite joseki]
;W[ce]
;B[bd]
;W[de]
;B[be]
;W[cb]
;B[gd])))
(;B[jp]C[maybe this is why it preferred k4 earlier. black 50% now]
(;W[iq]
;B[kp]
;W[kq]C[must think these are good exchanges to get now])
(;W[ip]
;B[kq])
(;W[kp]
;B[iq]C[maybe one reason LZ wants to attach now is the ladder might be bad later if white gets stone around d10]
;W[ip]
;B[jo]
;W[kq]
;B[hp]C[ladder good now]))
(;B[cc]C[U: Here is a good variation from AlphaGo teach.]
;W[dc]
;B[cd]
;W[cf]
;B[ce]
;W[de]
;B[bf]
;W[nc]
;B[jp]C[AG also likes k4.]
;W[kp]
;B[ko]
;W[co]
;B[ip]
;W[iq]
;B[hq]
;W[lp]
;B[hp]
;W[lo]
;B[kn]
;W[dn]))
(;W[dn]C[LZ wants to attach here, which would probably have got us scolded by our teachers a few years ago as playing crude kyu moves. The theory was you shouldn't attach to your opponent's potentially weak stone as it helps them settle and loses future attacking opportunities, but bots seem to like trying to make a more secure white formation and pose black efficiency questions.]
(;B[co]C[LZ wouldn't hane!]
;W[do]
;B[cp]
;W[cq]
;B[dm]
;W[bq]
;B[cl]C[this looks rather clumsy to me...]
;W[dk]
;B[em]
;W[ck]
;B[fl]
;W[fj]
;B[ip])
(;B[dm]C[Why does it think this is bad?]
;W[en]
(;B[bo]C[LZ #1]
;W[cq]C[This "new joseki" can also be found in AlphaGo Teach]
;B[cf]
;W[fc]
(;B[em])
(;B[bq]))
(;B[co]C[If Guo Juan was trying to show me why d6 was bad, I expect she's say black here.]
;W[cp]
(;B[ck]C[.. and here]
(;W[fp]LB[ck:3][dm:5][cn:1][dn:4][en:6][co:7][cp:8][fp:2]C[if white defends here then the thinking was it's like black 1 approached, white 2 jump, black 2 space extension (3) and then some potentially bad exchanges from white (4) which made black stronger (but also c4 block secured the corner which is very big so I'd never been totally convinced by that reasoning). White is 51.4% here. However...])
(;W[em]C[LZ thinks this classic crude move is a lot better than f4 honte (white 54.6%)]
;B[dl]
(;W[el]C[don't bother defending e4 cut, say if black pushes and cuts white can fight with this wall])
(;W[in]C[interesting surround (kakoi?)]))
(;W[dl]C[This tesuji is best]
(;B[em]
;W[cm]
;B[cl]
;W[bm]
;B[bn]
;W[do]
;B[bp]
;W[bq]
;B[ao]
;W[fm]
;B[el]C[LZ thinks this is good for white, 58%. I imagine some humans might be reluctant to make black stronger like this, but white did fix e4 in sente and has some powerful sente moves to use the dead stones.]
;W[qc]C[(3-3 of course!)])
(;B[cm]
;W[em]
;B[do]
;W[eo]
;B[ep]
(;W[fp]C[best at 10k]
;B[eq]
;W[dr]
(;B[er]
;W[dq]
;B[gq]
;W[hp]
(;B[cr]
;W[ds]
;B[bp]
;W[bq]
;B[el]
;W[dk]
;B[fl]
;W[gn]
;B[bo]
;W[br]
;B[cj])
(;B[hq]
;W[ip]
;B[el]
;W[dk]
;B[cl]
;W[dj]
;B[fl]
;W[gp]
;B[ci]
;W[fj]))
(;B[jp]))
(;W[el]
;B[eq]
;W[dr]
;B[er]
;W[dq]
;B[bp]
;W[bq]
;B[bo]
;W[cr]
;B[ip]
;W[jp]
;B[io]
;W[iq]
;B[gp]
;W[hq]
;B[gn]))))
(;B[cl]C[initially LZ thinks this best, presumably to maximize cut threat and remove the d8/e7 aji with d9 defence.]
(;W[gp]C[initially wants to defend here with 53.6, it does look a nice big territory (is it?)])
(;W[bm]
(;B[cf]C[LZ says black should tenuki,]
;W[qc]
;B[qd]
;W[pc]
;B[od]
;W[nb]
;B[cm]
;W[gp])
(;B[cm]C[if connect ]
(;W[fp]C[if tight defence]
;B[ci]C[black needs to defend as c10 attack is more severe])
(;W[gp]C[if the looser one]
(;B[cf]C[says black can get away with this]
;W[cj]C[an example sequence without deep reading]
;B[ej]
;W[ch]
;B[ef]
;W[eh]
;B[fd]
;W[bd]
;B[fl])
(;B[jp]C[or this attachment to exploit white's thin shapes.])))))
(;B[em]C[#1 after 5k])))))
(;B[nc]C[U: Playing this knight enclosure with the Chinese opening was very popular around 2014 and is LZ's #1.]))
(;W[jp]C[LZ thinks 0.2 better. Lee Sedol did play this in other games]
;B[cn]
;W[fq]C[If k4 high, then f3 low has good balance (compare k3 low and f4 high), and the corner is less open.]))
(;W[nc]
(;B[pf]C[U: Jump is practically automatic for humans.]
;W[qc])
(;B[oc]C[LZ wants to kick (but jump fine too)]
;W[nd]
;B[pf]
;W[jd]
;B[lb]C[We also saw this in some AG zero games.]
;W[qc]
;B[nb]
;W[lc]
;B[pb])))
(;B[pn]C[LZ40b and AG and Elf all agree this is the best move, and this big shimari is very popular these days but would have been very strange back in 2011.]))