(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[AGA]SZ[19]KM[7.50]
PW[YR Z]PB[DH]C[2017 12 22 analysis

trying to say where I would play now in the same situation. Hopefully I have improved, and hopefully that will make it more concrete to myself and help my confidence.]
;B[pd]
;W[dq]
;B[dd]
;W[pp]
(;B[do]C[see note.

I haven't played the high approach for several months now, but I think I may well come back to it soon.]
;W[eo]
(;B[en]
;W[ep]
(;B[dm]C[these days, B's efficiency looks shoddy in my eyes, mostly E6 which is supposedly good shape normally is too slow to invest gote for a centre move.

I don't know if that means I prefer W's efficiency here? Because W's play is pretty crude. But my first instinct these days is W's play is to take sente. My judgement is even until proven otherwise. ]
(;W[fn]C[my judgement today is that this is surely too early

the D7 tiger mouth is overly solid, but most of all, it should be defending against this hane]
;B[fm]
;W[gm]
(;B[gn]C[absolutely necessary?]
;W[fo]
;B[fl]
;W[gl]C[though the F6 hane feels early, the D7 move still looks inefficient for territory compared to B5. B is playing overly solid, and still doesn't have great eyespace if W enters on the left. And is getting pushed around here. B is overconcentrated, but still not solid enough to hane easily.]
(;B[gk]
(;W[hn]C[solid and proper]
;B[hk]C[I am not impressed by B's shape, but I can't find any better move.]
(;W[fk]C[The judgement of this position comes down to whether this cut works or not. Since B will get some solid territory, but will W get profit from separating the G9 stones and naturally entering B's area of influence?

]
;B[hm]C[premature, surely?

there was a lot of aji if B could get a ladder breaker around K3. I really dislike this move as it doesn't seem to help the centre fight clearly. I probably was nervous that W might tenuki later, but I don't think that is a good enough reason to make over commit to the centre stones like this.]
;W[go]
;B[hl]
;W[gn]
(;B[dk]C[B's shape is truly still bad, but is it  worth W getting a weak group in the centre. I still don't know.]
;W[fj]
(;B[di]C[this shape is just wrong

correction: this is fine, but B has to fix immediately]
(;W[gi]C[if W can only play here, W fighting here doesn't look reasonable]
(;B[ii]C[not much value fighting if W is so easily alive

this is a big mistake, but lots of reading was required for me to realise C4 was the critical shape point]
;W[el]
;B[em]
;W[dl]
(;B[cl]
;W[ek]
(;B[bm]
;W[dj]
;B[ci]
;W[ck]
;B[bk]
;W[cn]
;B[cm]
(;W[ei]C[B in serious trouble this game already. mostly because W is basically alive and B's centre is weak.

Note that at least W C10 is never necessarily sente though I doubt I realised that at the time.

I think I remember feeling bad about this, but not being sure, given that I was in such a good position not too long after.]
(;B[jn]C[another bad shape move]
(;W[in]C[too uncaring of territory]
;B[jm]
;W[im]
;B[jl]
;W[il]
;B[ik]
;W[jk]
;B[jp]C[only move]
;W[kk]
;B[nq]
(;W[jo]C[what???]
;B[ko]
;W[io]
(;B[lm]C[this feels slack somehow]
;W[kp]
;B[lo]
(;W[mk]C[this feels overly committal, at least in the game it looks dumb]
;B[ig]
;W[ih]C[???]
;B[hh]C[I think I agree with taking the ponnuki, the 5 stones are small]
;W[hi]
;B[jh]
;W[ij]C[I think B is so happy, comparing to when B played K6, the result seems inexplicable]
(;B[kq]
;W[oq]
(;B[np]
;W[qn]C[so the position has settled down now

I'd count around 15+15+10 points for W

And 12+15+potential at the top with 2 star points and a ponnuki, so I definitely like B now.]
(;B[jd]C[I remember struggling with this move, since I normally hate the efficiency of these sanrensei type moves, but thought that I needed to help out my ponnuki as it was a bit weak given W's super thickness.]
;W[qf]
;B[pf]C[I remember being shocked that I would play these centre oriented moves when I never did normally, but I had my reasons given the ponnuki. Maybe I thought I was ahead and wanted to simplify (I think I was very happy with the ponnuki off my weak group though I think I was also happy beforehand when I was clearly behind).

I actually think this move is pretty reasonable in this position]
;W[pg]
;B[of]
;W[qd]C[I like this move]
(;B[qe]C[simple]
;W[re]
;B[pe]
;W[rg]
;B[qc]
;W[rd]
;B[og]
;W[ph]
;B[jj]C[I was concerned that this wouldn't be sente later. It is worth around 15 points + W's thickness, so it is unlikely for W to tenuki now, but later, it isn't so clear.]
(;W[hj]
(;B[fd]C[interesting direction, it seems sensible to defend the most important weakness around K18]
;W[bj]C[he must have misread]
;B[cj]
;W[ak]
;B[dk]
;W[pc]C[this ko threat loses an incredible amount of aji]
;B[oc]
;W[ck]
;B[bl]
;W[dh]C[this loses some aji of C16]
(;B[bh]
;W[ch]
;B[bi]C[B13 is double ko, so B can tenuki, i.e. cut at E12 for example]
;W[hc]C[W has to invade, otherwise W seems well behind]
(;B[fc]C[I found the killing question extremely tough and felt very uncomfortable playing here]
;W[jc]
;B[kc]
(;W[id]
;B[jb]C[I remember taking ages to think here, and not happy with the result, but in hindsight, I think B did ok here.]
;W[ib]
;B[ic]
;W[pb]C[good probe]
;B[ob]
;W[jc]
;B[kb]
;W[je]
;B[kd]
;W[hf]
;B[gg]C[truly very difficult for W to live]
;W[cd]
(;B[de]C[solid!]
;W[cc]
;B[ce]
;W[eb]
;B[fb]
(;W[db]C[W definitely got something out of the invasion, but the H14 G13 exchange is very bad.]
;B[be]
;W[bb]C[in the end I think B is content as B was leading anyway, but perhaps not by much, given that I think I gained quite a bit in the endgame, such as getting F2 in sente, and E13 and B5 for free.]
(;B[pm]C[good endgame, simplifying]
;W[pn]
;B[om]
(;W[lh]
;B[lg]
;W[mg]
;B[lf]
;W[kh]
;B[eg]
;W[kg]
;B[kf]
;W[rl]
;B[iq]
(;W[cp]C[too small surely]
(;B[rc]C[over 15 points]
;W[rb]
;B[qb]
;W[sc]
;B[pa]
;W[eh]
;B[nr]
;W[or]
;B[os]
;W[ps]
;B[ns]
;W[pr]
;B[fr]
;W[ip]
;B[jq]
;W[hr]C[surely too early? like this B gets this 10 move in sente.]
;B[hq]
;W[gr]
;B[gq]
;W[er]
;B[fq]
;W[fs]
;B[pk]
;W[bg]
;B[dk]
;W[dg]
;B[ef]
;W[jf]C[I actually didn't even consider this, so I got terrified, having to count liberties precisely, and having no intuition at the time for who had more.]
;B[jg]
;W[gf]
;B[ff]
;W[hg]
;B[gh]
;W[gb]
;B[fa]
;W[if]
;B[ge]
;W[he]
;B[gd]
;W[hd]
;B[ha]
;W[ga]
;B[ia]
;W[fh]
;B[fg]
;W[kj]
;B[bd]
;W[ji]
;B[ih]
;W[bc]
;B[ke]
;W[qj]
;B[ir]
;W[gs]
;B[co]
;W[bp]
;B[bo]
;W[no]
;B[nh]
;W[mo]
;B[mp]
;W[nm]
;B[nj]
;W[oi]
;B[ni]
;W[ol]
;B[ok]
;W[mh]
;B[qk]
;W[rk]
;B[qm]
;W[rm]
;B[ap]
;W[aq]
;B[ao]
;W[br]
;B[ej]
;W[mf]
;B[me]
;W[nk]
;B[oj]
;W[oh]
;B[ng]
;W[dj]
;B[eq]
;W[cr]
;B[ej]
;W[ec]
;B[ed]
;W[dj]
;B[pj]
;W[pi]
;B[ej]
;W[nf]
;B[ne]
;W[ag]
;B[li]
;W[ki]
;B[lj]
;W[mm]
;B[ja]
;W[ah]
;B[ai]
;W[dj]
;B[ck]
;W[ej]
;B[sb]
;W[sa]
;B[ra]
;W[qa]
;B[qi]
;W[rj]
;B[ra]
;W[ll]
;B[sb]
;W[ln]
;B[kn]
;W[km]
;B[sd]
;W[sf]
;B[ea]
;W[ca]
;B[on]
;W[oo]
;B[nn]
;W[mn]
;B[sc]
;W[se]
;B[hp]
;W[dp]
;B[ac]
;W[ab]
;B[ad]
;W[is]
;B[js]
;W[es]
;B[lp]
;W[kl]
;B[hs]
;W[df]
;B[hb]
;W[is]
;B[rh]
;W[ri]
;B[hs]
;W[cf]
;B[bf]
;W[af]
;B[is]
;W[fp]
;B[gp]
;W[op]
;B[pl]
;W[nl]
;B[ql]
;W[mj]
;B[mi]
;W[lk]
;B[gc]
;W[dc]
;B[da]
;W[cg]
;B[ae]
;W[ho]
;B[]
;W[]TW[aa][ba][cb][rf][qg][sg][qh][rh][sh][fi][qi][si][gj][jj][sj][gk][hk][ik][sk][hl][ml][sl][hm][lm][sm][rn][sn][po][qo][ro][so][qp][rp][sp][bq][cq][pq][qq][rq][sq][ar][dr][qr][rr][sr][as][bs][cs][ds][qs][rs][ss]TB[ga][ka][la][ma][na][oa][qa][sa][gb][ib][lb][mb][nb][pb][rb][hc][ic][jc][lc][mc][nc][pc][hd][id][ld][md][nd][od][ee][fe][he][ie][je][le][oe][gf][hf][if][jf][hg][aj][bj][ak][al][am][an][bn][cn][dn][kp][lq][mq][jr][kr][lr][mr][ks][ls][ms]C[B+13.5])
(;B[qb]C[now that I consider, is this the best endgame? since S18 is now gote (though a huge 8 point reverse sente to respond)

it seems practically the same, but B gets more if B plays first.

hmm, but this way around W can play S17. On the other hand, B can just respond and that seems better for B than the game (maybe by 4/3 point). so W should still play S18 locally, but maybe then B will tenuki for F2.

hence W should play H2 right now. And there is a big endgame in the corner left, of around 8 points.]))
(;W[hr]C[this is massive endgame too, though I think R18 is biggest]
;B[hq]
;W[gq]))
(;W[lg]C[does deeper work?]
(;B[lh]
;W[mh]
;B[mg]C[doesn't look good for W]
;W[kh]
;B[li]
;W[ki]
;B[kg])
(;B[mh]C[this might work but B has to be careful]
;W[lh]
;B[li]
;W[ki]
;B[kh]
;W[mi]
;B[lj]
;W[kj]
;B[mj]
;W[ni]
;B[nj]
;W[oi]
;B[mg])))
(;B[qm]C[if B is behind, B needs to be more territorial, but it looks unreasonable when W is so solid in the centre and the R15 wedge crudely gave W strength])
(;B[po]
;W[qo]
;B[qq]C[sadly W has the ladder])
(;B[qq]
;W[pq]
;B[rp]C[not sure if it is worth trying to live here]))
(;W[dc]
;B[be]
;W[bd]))
(;B[cc]C[if at all possible, B should try to keep the corner and force W to connect at E12]
;W[de]C[was I scared of this?]
(;B[ce]C[this looks risky for B]
;W[bd]
;B[be]
;W[df])
(;B[gf]C[but even if I just defend, is it not better than the game?])))
(;W[kb]C[I think W had to try this sort of thing]
;B[jb]
;W[ic]
;B[lb]
;W[kd]
;B[lc]
;W[je]))
(;B[hd]
(;W[gc]
;B[fc]
;W[jc]
;B[id]
;W[kc]
;B[lb]C[I might try to kill like this today])
(;W[ic]
;B[jc]
;W[fb]C[very difficult to kill, but maybe profit is sufficient]))
(;B[jc]C[I'm more tempted by this today]))
(;B[eh]
;W[dg]C[this is sente so this is risky for B]))
(;B[cc]C[probably too easy to invade at K18])
(;B[fc]C[today I might consider this but I'd still rather play high if I can make it work]))
(;W[cc]C[this is huge, but ]
;B[hj]C[after this, all 3 W groups may suffer a little])
(;W[gj]C[I totally expected this]))
(;B[qc]C[this move is normal, but in this position, for some reason, I feel comfortable with the simple way I played in the game (even when I am sure alphago would be very unhappy)]
;W[qe]
;B[pc]C[B taking gote here means B still has to threaten the W group a little bit, but the aji of W invading around M17 remains very confusing. In the game, I wanted simple certain territory if I took gote.]))
(;B[qf]C[I suspect I would still go for the corners today, the efficiency is important]))
(;B[nr]C[I remember finding this decision difficult, but I think I would choose this today

I wanted to leave a more powerful follow up in the game, but this leaves a pretty powerful follow up still as W doesn't have eyespace]))
(;B[jq]C[Ideally here is better if N4 is not a problem

i'd find the game shape hard to accept if this works]
;W[mp]
;B[oo]
;W[qn]
;B[po]
;W[qo]
;B[pq]C[W isn't going anywhere right?])
(;B[oo]
;W[qn]
;B[jq]C[maybe like this?]))
(;W[jh]C[this remains powerful])
(;W[qn]C[I think I would play here if K12 didn't work])
(;W[kq]C[or here]))
(;B[ln]C[perhaps this allows for more active play such as J3 later])
(;B[ll]))
(;W[jh]C[this practically captures]))
(;W[jp]C[I think W just needs to respond to be happy and B's centre remains weak.

B is giving away lots of territory for free]))
(;B[qn]C[I think I would play here today]
;W[nq]
;B[pj]C[trying to help out the centre naturally])
(;B[kq]C[this would be over aggressive as W is pretty solid.]
;W[qf]
;B[nc]
;W[rd])
(;B[cj]C[I think I also overestimated how strong this W group was, it isn't really alive yet]))
(;W[cj]
;B[ei]C[this does truly seem a threat]))
(;B[cm]C[another idea]
;W[dj]
;B[cj]
;W[ck]
;B[bk]
;W[ei]
;B[dh]C[I'm not clear if this is any better than the game]))
(;B[ek]
;W[cl]
;B[cm]
;W[ck]
;B[cj]
;W[bj]
;B[bi]
;W[bm]
;B[cn]C[there is ko aji with B8, but]
;W[bk]C[this is powerful]
;B[ei]C[only move]
;W[bo]C[B in deep trouble]))
(;B[cq]C[something to consider?])
(;B[cp]C[another try, but it still doesn't seem to help.

my eventual conclusion is that this is the only move - B has to fix the shape right now (G11 was sente)]
;W[cq]
;B[ii]
;W[el]
;B[em]
;W[dl]
(;B[cl]
;W[ek]
;B[ck]
;W[cm]
;B[dn]
;W[bn]
(;B[bm]
;W[cn]
;B[bo]
;W[an]C[oh dear B dies])
(;B[bo]
;W[bl]
;B[bk]
;W[dp]
;B[co]
;W[ap]C[B dies I think]))
(;B[ek]
;W[cl]
;B[cm]
;W[ck]
;B[cj]
;W[bj]
;B[bi]
;W[bm]
(;B[bn])
(;B[cn]C[an idea]))))
(;W[el]C[W should go immediately I think]
;B[em]
;W[dl]
(;B[cl]
;W[ek]
;B[bm]
;W[dj]
;B[ci]
;W[ck]
;B[bk]
;W[cj]
;B[bj]
;W[ei]C[W is pretty happy like this])
(;B[ek]C[actually this strong move seems to work

my eventual conclusion is that it doesn't really]
;W[cl]
;B[cm]
;W[bm]
;B[cn]
;W[bl]
;B[fi]
;W[gj]
;B[hi]
;W[bo]
;B[gi]
;W[co]C[W seems happy]
;B[hj]
;W[jc])))
(;B[cq]C[this still seems impossible?]
;W[dp]
;B[cp]
;W[co]
;B[dn]
;W[bo]
;B[dr]
;W[er]
;B[bp]
;W[bm]
;B[cr]
;W[bk]C[B seems doomed])
(;B[cp]C[but perhaps it is worth exchanging this now])
(;B[cj]C[other wise this seems proper]
;W[dj]C[though B's shape remains rubbish])
(;B[dj]C[is this too outrageous?]))
(;B[ek]C[is this too outrageous?

given all the other variations, I would strongly consider this]
;W[fj]
;B[ej]
;W[fi]
;B[ei]
;W[fh]
;B[dg]
;W[ef]
;B[df]
;W[ih]))
(;W[ch]C[if W just splits (not necessarily immediately), it is better for immediate territory, but B will naturally defend the cut]))
(;W[il]C[not an idea I like as I don't value the centre, but still an idea]))
(;B[fk]C[I would strongly consider extending here before hane. Not because I am aiming at H6 (I don't value the centre so much), but I just think this may be proper given what happened in the game.
]))
(;B[fl]
;W[gn]C[hard to judge. my first instinct was that the atari was absolutely necessary, but it is hard to judge

since B is going to enter the lower side, the G4 peep is a real possibility

yes, there is no power in the G8 turn, but B doesn't need to turn there even if W enters the left. B should have eyespace?]))
(;W[cc]C[sente here?]
;B[cq]C[locally is this reall a big deal?]
;W[cr]
;B[cp]
;W[hq]C[locally here is my new feeling

somehow, I still dislike the B shape, I would rather remove the E6 stone. Whereas I can't remove any W stone. D7 is high enough that a W invasion on the left is still very hard to deal with.

Hmm, I suppose W's shape is pretty dumb too though. The two moves at E4 and E5 are probably better with one move at E2.

maybe D7 is better placed at D8, but it is hard for me to judge.]))
(;B[bo]C[alphago jumps here.

I don't know if I understand it well enough to use it]
(;W[dn]C[this is not a fear]
;B[dm]
;W[cn]
;B[cm]
;W[bn]
;B[co])
(;W[fn]
;B[em]
;W[fm]
;B[el])
(;W[cn]
;B[dn]
;W[co]
;B[cp])
(;W[cl]
(;B[dm])
(;B[ci]))
(;W[cp]
(;B[cl]C[maybe?])
(;B[fn]))))
(;B[cq]C[but I would almost certainly play here these days]
;W[dp]
;B[cp]
;W[en]
;B[dn]
;W[dm]
;B[bm]
;W[bl]
;B[em]
;W[dl]
;B[bn]
;W[cr]
;B[br]
;W[er]
;B[cs]))
(;B[co]C[I would be more likely to approach low these days, following alphago, but actually, I think I am quite happy with high too. It is harder for humans to deal with alphago's territory snatching strategy since our reading/shape/l&d don't have the reading/precision required (so we don't know when to dare to tenuki or which probe to make first)]))