(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[AGA]SZ[19]KM[7.50]
PW[Zhao Zihe 3d]PB[DH]C[I won by resignation just before counting B+81.5

He gets a bad result out of the opening after his big overplay on move 13 and my overly aggressive punishment which he just submits to (I really don't think my moves work).

My move 67 looked weird but I think it was optimal. I was proud of move 95, as it didn't seem so easy to find a clear way forward.

Fighting at 149 meant I played a lovely exchange sacrificing a semeai of 10 stones at move 161
]
;B[pd]
;W[cp]
;B[pp]
;W[dc]
;B[eq]
;W[hq]
;B[ce]
;W[fd]
;B[do]
;W[co]
;B[dn]
;W[cm]
;B[jq]
;W[lq]C[huh! aggressive]
;B[ip]
;W[go]
(;B[ho]C[in hindsight this really isn't correct shape

but it was automatic since I've gotten really good results like this online]
;W[gp]
;B[dm]
;W[cn]C[huh??

trying to short my liberties]
(;B[gn]C[I'm really skeptical that this works after the game]
;W[fn]
(;B[fo]C[really???]
;W[fp]
;B[dp]
(;W[eo]C[really??]
;B[fm]C[this is precisely the reason I played F5, to make it difficult for W to get out.]
(;W[jr]
;B[kr]
;W[hn]C[inexplicable given the follow up]
;B[gm]
;W[ir]
;B[kq]
(;W[fr]
;B[in]
;W[dr]C[too small, I now have a zillion ko threats

W was already alive so this is pretty pointless]
;B[hc]C[W has less than 30 points and B has potential across the rest of the board]
;W[cd]
;B[de]
;W[gc]
;B[hd]
;W[ff]
;B[di]C[I took a while on this move, I played high and 3 space for better connection (in case H6 runs), and as the centre potential was huge for me

I was also thinking that since B15 was half sente on the W group, playing ambitiously from the 3 stone wall made sense despite the F14 stone aiming at issues there]
(;W[qf]C[this seemed to help me defend H16]
;B[nd]
;W[pj]C[adventurous shape, it really feels like I am playing a 2 stone handicap game now. (M3 is completely wasted and even without the M3 stone the lower left shape feels good for B)]
(;B[qm]C[I don't know why he never ran out with the ladder at H7, as that would maybe create more complications

on the other hand perhaps I have the J8 tesuji and I can sacrifice G6.

the R12 is getting pretty severe

The R7 move looks ok for efficiency as in the game we see that W living in the corner in sente isn't that comfortable. 

But B spending a move at Q3 still looks like good territory]
;W[lr]C[doesn't really work]
;B[ls]
;W[ms]
;B[ks]
;W[qq]
;B[pq]
;W[qp]
;B[qr]C[I am all too happy to play this variant, as I have been feeling recently that often it is just locally better than R5.

But in this case M2 and N1 may lose 5 points compared to the normal L1 endgame if they die, so I am more happy to keep them cut off.]
;W[rr]
;B[pr]
;W[qn]
;B[pn]
;W[po]
;B[oo]
;W[qo]
;B[pm]
;W[rm]
;B[rl]
;W[sn]
(;B[ol]C[this took me a long time to settle on.

as it feels like bad shape, trying to do too many things at once, when my first instinct was R9 or O6

given the aji of T7, I concluded that R9 was not shape (I may have S9 in sente).

I think O6 doesn't deal well with the R8 cut.

I strongly think this is actually the best move. And in this game the centre is unusually important that O10 is a huge follow up.]
;W[ld]C[time to play aggressive]
;B[rs]
;W[sr]
;B[sm]C[I knew this aji was here and after the game, I work out that it essentially means S9 or T9 is sente. 

And this explains why protecting at R9 earlier just wasn't shape.

However, I considered for a while whether this was really the best time to start it. in hindsight, the timing does feel pretty good, but I think W could have fought the ko for longer.

I have many threats at E2 etc, but W has emergency threats at P4]
(;W[sl]
;B[sk]
;W[oe]C[it is reasonable for W to tenuki as I can't really kill W that easily (I need 2 moves)]
;B[od]
(;W[sp]C[but if W defends P8 looks better than at R9]
;B[sm]
;W[no]
;B[on]
;W[sl]
;B[qe]
(;W[pf]C[not shape

B is very happy locally to get this much territory and eyespace]
(;B[mf]
;W[ie]C[I felt under a little pressure as I shouldn't let the H16 stones die so easily]
;B[sm]
;W[nq]
;B[op]C[obviously better than O4 but it took me a while to realise]
;W[sl]
;B[nj]
;W[rk]
;B[sm]
;W[rn]
;B[qk]C[S9 doesn't look good]
(;W[mh]C[trying to make a decoy and start a ko or something]
;B[kg]C[I have to be careful about the O15 cut in this position

I like this move, it looks like miai of M11 and K16]
;W[li]
;B[jd]
;W[je]
;B[ke]
;W[kd]
;B[jc]
(;W[kb]
(;B[he]
;W[jb]
;B[ib]
;W[hf]C[I'm not sure this is a good idea, but I guess it is hard to find a good move]
;B[gf]
;W[ig]
;B[hg]
;W[if]
;B[ge]
;W[gg]C[this felt very questionable]
;B[fe]
;W[mb]
;B[nb]
;W[me]
;B[ne]
;W[lf]
;B[nf]
;W[lg]C[so K16 initiated a huge exchange, and overall I think W did ok out of it, but it simplified the game in my favour.]
;B[hh]
;W[dk]
;B[nh]
;W[gh]C[what??? B has a zillion sentes due to the threat of L14 which I had wanted to play very early]
;B[fb]C[nice tesuji, but ...]
(;W[eb]
;B[gi]
;W[fi]
;B[hi]
;W[dh]
;B[ch]
;W[ei]
;B[dg]
;W[eg]
;B[eh]
;W[fh]
;B[dj]
;W[dh]
;B[ed]
;W[df]
;B[cg]
;W[fk]
;B[hk]
;W[ek]
(;B[lk]C[leaving the O11 ko, but I judged that this was bigger

note that I finally defended the H6 ladder]
;W[ec]C[huh??]
;B[fc]
;W[ij]
;B[ji]C[I could have just defended, but I was confident enough in my reading (I wanted to play L14 long before) that I fought]
;W[kj]
;B[ki]
;W[jj]
;B[kf]
;W[ii]
;B[ih]
;W[jh]
;B[kh]
;W[hj]
;B[jg]
;W[gj]
;B[le]
;W[jh]
;B[lj]C[W collapsed even more, losing maybe 20 points more]
;W[hm]
;B[il]
;W[jl]
;B[jm]
;W[kl]
;B[lm]
;W[km]
;B[kn]
;W[ll]
;B[mm]
(;W[em]
;B[im]
;W[ee]
;B[ef]
;W[md]
;B[mg]
;W[ee]
;B[dd]
;W[cf]
;B[be]
;W[bf]
;B[ef]
;W[lh]
;B[ih]
;W[ee]
;B[af]
;W[bg]
;B[ef]
;W[bh]
;B[fg]
;W[ci]
;B[cc]
;W[rj]
;B[sl]
;W[re]
;B[rd]
(;W[rg]
;B[qj]C[unconditional death was my calculation

though W seemed to live in the corner (ko=life here with S17)]
;W[sd]
;B[rc]
;W[qi]
;B[qh]
;W[rh]
;B[ph]
;W[sj]
;B[ql]
;W[qg]
;B[sf]
;W[pi]
;B[oh]
;W[ml]
;B[nl]
;W[cb]
;B[bc]
;W[fa]
;B[gb]
;W[ga]
;B[hb]
;W[id]
;B[ic]
;W[se]
;B[ri]
;W[el]
;B[mk]
;W[ob]
;B[nc]
;W[rb]
;B[sc]C[B+R]
;W[iq]
;B[jp]
;W[hp]
;B[hl]
;W[ag]
;B[ae]
;W[ff]
;B[ee]
;W[hh]
;B[js]
;W[is]
;B[mi]
;W[jh]
;B[fg]
;W[ih]
;B[qs]TW[cg][dg][hg][ah][ch][eh][ai][bi][di][gi][hi][aj][bj][cj][dj][ej][fj][ak][bk][ck][al][bl][cl][dl][am][bm][dm][an][bn][dn][en][ao][bo][do][fo][ro][so][ap][bp][dp][ep][rp][aq][bq][cq][dq][eq][fq][gq][rq][sq][ar][br][cr][er][gr][hr][as][bs][cs][ds][es][fs][gs][hs]TB[aa][ba][ca][da][ea][fa][ga][ha][ia][ja][ka][la][ma][na][oa][pa][qa][ra][sa][ab][bb][cb][db][eb][jb][kb][lb][mb][ob][pb][qb][rb][sb][ac][dc][ec][gc][kc][lc][mc][oc][pc][qc][ad][bd][cd][fd][gd][kd][ld][md][qd][sd][me][oe][pe][re][se][ff][lf][of][pf][qf][rf][lg][ng][og][pg][qg][rg][sg][lh][mh][rh][sh][li][ni][oi][pi][qi][si][mj][oj][pj][rj][sj][nk][ok][pk][rk][pl][hm][nm][om][hn][jn][ln][mn][nn][io][jo][ko][lo][mo][no][kp][lp][mp][np][lq][mq][nq][oq][lr][mr][nr][or][ms][ns][os][ps]C[B+81.5])
(;W[ph]C[I thought this was the strongest variation and I couldn't do better than ko]
;B[qj]
;W[qi]
;B[ri]
;W[rh]
;B[sj]
(;W[sf]C[this is a very pretty move W noticed in the post-game review. The other moves are also ko, but this one seems marginally better]
;B[rg]
;W[qg]
;B[sh]
;W[sg])
(;W[sd]C[I just noticed that this ko might be best])))
(;W[jo]C[interesting aji here]
;B[im]C[but it was very hard for me to spot this move to defend everything]
;W[ml]
;B[nl]C[I think I can even respond here]))
(;B[kf]C[I had almost wanted to play this now as even if W captures 3 stones it is not alive, but decided it was too much of a mess because there was a ko]
;W[kh]
;B[jh]
;W[jg]
;B[ki]
;W[ji]))
(;W[hi]C[perhaps I got overconfident, forgetting W could tenuki]))
(;B[jb]C[I thought this probably worked to kill W and it may be proper but it felt like

i) W could squeeze me in this semeai

ii) I wasn't completely sure if I hadn't missed something ]))
(;W[me]
;B[le]C[I have this move]))
(;W[rj]
;B[qj]))
(;B[sm]C[I was nervous to take the ko]
;W[mf]C[this seemed so big]
;B[rn]C[the corner is still ko]
;W[ig]C[I was nervous and the R17 is a bit confusing too]))
(;W[re]C[surely here]))
(;W[hm]C[At the time I still hadn't worked out what I was going to do if W did something like this]
(;B[il]C[this seems plausible]
;W[hl]
;B[hk]
;W[gl]
;B[im]
;W[gk]
;B[gj]
;W[hj]
;B[fk])
(;B[sm]C[at the time I hadn't worked out what the best way to kill W locally was.

Now I worked out this capture is best]
;W[rn]
;B[rp]
(;W[sl]C[but when W takes back I have to have a good threat as otherwise R8 is too much to allow])
(;W[ql]C[W also has this and B can't realistically kill W anymore and B has to be satisfied with getting a free stone at R9 and S9

hmm, in that case perhaps
protecting at R9 earlier wasn't such a bad idea. ]
;B[qk]
;W[sl]
;B[rk]
;W[sp]C[the R9 and S9 stones must be useful.]))))
(;W[rn]
;B[rk]C[this is sente (this is why I didn't protect at R9 earlier)]
;W[qi]
;B[rp]
;W[sp]
;B[rq]
;W[sl]
;B[ro]))
(;B[ok]C[even this feels more shapey but in reality the P6 cut is sente and I have to play O5, and so the R8 cut is a big problem in this shape

It is huge to hold onto S8 given the T7 aji and the thinness of the whole  R14 group.]))
(;B[qh]C[I was definitely tempted by this move and it may well be best, but I was nervous of complications])
(;B[ql]C[this looks natural to aim at P9, but I'm not sure that is really the key point when the R3 is still open and in the game B can aim more efficiently at R12]))
(;W[kd]C[I kind of assumed that this was the important point to fight]
;B[pj]C[but perhaps this side is bigger?]))
(;W[in]C[maybe, otherwise H6 makes no sense]))
(;W[gm]
;B[hn]
;W[em]
;B[fl]
;W[en]
(;B[cq]C[this was my plan]
;W[el]
;B[cl]
;W[bq]
;B[br])
(;B[dl]C[I'm not sure if this is better])))
(;W[fm]C[surely this is the only move?

and I feel that B is in serious trouble]))
(;B[fm]C[this just fails]
;W[dp]C[no great move]
(;B[fo]
;W[fp]
;B[en]
;W[ep]
;B[im]C[I still owe a move here])
(;B[hn]C[probably only move])))
(;B[dl]C[I feel like extend is the only move]
;W[gn]
;B[cl]
;W[dq]
;B[ep]C[B is still quite happy I think]))
(;B[dm]C[should push first]
;W[cn]C[if like game]
(;B[dl]C[extend is shape and W doesn't have good shape to run out anyway])
(;B[im]C[or here first])))