(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[AGA]SZ[19]KM[7.50]TM[1800]OT[15/300 Canadian]
PW[Henry Clay]PB[Ariane Ougier ]WR[1k]BR[3k]DT[2012-10-31]PC[The KGS Go Server at http://www.gokgs.com/]RE[W+Resign]
;B[pd]BL[1783.631]
;W[dp]WL[1795.859]
;B[pq]BL[1776.483]
;W[dd]WL[1783.031]
;B[fq]BL[1772.601]
;W[po]WL[1777.195]C[The calm move for White here would be c6, or more agressive, a pincer such as h3 or j4. With this move White refuses to let Black control the flow of the game and create a framework, such as the popular Kobayashi opening at k4, or Chinese at r9.]
;B[pl]BL[1711.564]C[As White ignored f3, the most natural move would be to double approach at c6, but this is another good choice. However Black should remember that White ignored f3, so should aim to either get sente to double approach in the lower left, or else do something nasty to White if he tenukis from this corner to answer in the left.]
;W[mp]WL[1656.26]
;B[oo]BL[1702.666]
;W[on]WL[1649.193]
;B[no]BL[1699.461]
;W[pp]WL[1642.69]
;B[nq]BL[1695.699]
;W[nn]WL[1615.785]C[This is usually considered a mistake in joseki order; R3 should be played first. However, pros play this way and it usually reverts to the joseki result in the game.]
;B[mo]BL[1602.98]
;W[qq]WL[1605.608]
(;B[oq]BL[1594.764]C[See Variation 1.]
;W[qr]WL[1581.038]C[White can play this, the most severe move, because the ladder to the top left is good for him. s4 is the easy way.]
(;B[jp]BL[1542.72]C[A mistake: even though the ladder is bad, Black should cut and use a ladder breaker attachment.]
(;W[qn]WL[1519.174]C[A good move. White has a big corner and strong shape to the outside too now. k4 is a bit of a trick as it also threatens to cut, see Variation 3.]
;B[cf]BL[1497.207]C[Black should double approach d4 now: White gained in the lower right corner, so Black must gain in the lower left to compensate.]
;W[ch]WL[1452.406]
;B[cc]BL[1484.822]
;W[cd]WL[1447.921]
;B[dc]BL[1481.739]
;W[ed]WL[1444.8]
;B[bd]BL[1478.893]
;W[be]WL[1443.736]
;B[bc]BL[1478.099]
;W[ce]WL[1443.008]
;B[fc]BL[1476.297]C[A joseki, but the problem is it is gote.]
;W[cm]WL[1388.308]C[Now White helps his d4 stone and has a comfortable game. As this isn't c6, it is easy for black to invade at 3-3.]
;B[qf]BL[1421.424]C[Because White has such a strong shape at r6, q8 is quite weak and this indirectly helps it as well as the corner.]
;W[kc]WL[1333.637]C[It is hard for me to know the best move here. I am tempted to play d3 instead to make a big corner and aim at h3 later. Black can't turn the entire top side into territory in one move, so I don't think this is necessary.]
;B[fd]BL[1279.462]
;W[fe]WL[1300.26]
;B[hd]BL[1045.45]C[The hane at g15 is better.]
;W[ge]WL[1247.166]
;B[hc]BL[806.058]
;W[nc]WL[1212.563]C[White could also consider q18. If Black answers at r17 then White o17 makes a perfect alive shape, so Black will probably resist at p17 or n17. It could end up that White lives in the corner and sacrifices l17.]
;B[oc]BL[799.22]
;W[nd]WL[1196.878]
;B[nb]BL[794.991]
;W[mb]WL[1121.223]
;B[ob]BL[770.937]C[Black gets good corner profit and the white group is rather weak.]
;W[if]WL[1087.642]C[As this doesn't actually connect to the weak group, I might play d3 instead.]
;B[cq]BL[670.847]C[A huge move.]
;W[dq]WL[1077.998]
(;B[dr]BL[660.393]C[This hane is usual with c7 at c6, but now the standard sequence is as in variation 4.]
;W[er]WL[1008.933]
;B[cr]BL[656.404]
;W[eq]WL[1005.429]
;B[cp]BL[597.634]
;W[do]WL[985.243]
;B[bn]BL[562.749]
;W[pi]WL[935.953]
;B[jd]BL[427.031]
;W[lm]WL[857.23]C[p9 would be more solid, and with the weak group on the top side making q11 strong, would be sensible. The problem is the territory is open at s11. Maybe White could try something like r13 to close that gap in sente, but the weak group on the top is a big problem.]
;B[nk]BL[273.485]
;W[ni]WL[820.51]
;B[lk]BL[247.996]C[It's hard for me to comment on this fight.]
;W[mj]WL[809.975]
;B[mk]BL[240.05]
;W[jl]WL[760.407]
(;B[kl]BL[175.38]C[But this move definitely feels bad, making White stronger -- see Variation.]
;W[km]WL[753.66]
;B[ki]BL[164.829]
;W[jk]WL[720.131]
;B[lj]BL[63.566]
;W[mh]WL[638.551]
;B[kg]BL[32.819]
;W[pe]WL[587.721]
;B[qe]BL[26.69]
;W[od]WL[580.591]
;B[qc]BL[271.355]OB[14]
;W[lf]WL[557.309]
;B[lg]BL[247.319]OB[13]
;W[mf]WL[548.111]C[Although this stops l14 being Black's sente, it leaves a double peep at p12 that could be trouble. A block at n13 would be more solid.]
;B[jf]BL[195.295]OB[12]
;W[jh]WL[539.835]C[This looks like sente for a tesuji to cut at m11, but it isn't really as Black can resist at k10 or k11.]
;B[kh]BL[157.426]OB[11]
;W[kq]WL[533.337]C[Because White played r2 Black's group has less eyespace and this invasion has more power: if White lives or connects out then Black may have to worry about her own eyes.]
;B[lp]BL[142.251]OB[10]
;W[lq]WL[484.798]
;B[kp]BL[114.295]OB[9]
;W[ir]WL[480.457]
;B[iq]BL[58.839]OB[8]
;W[hq]WL[466.676]
(;B[jm]BL[55.712]OB[7]C[This cut didn't work well for Black: probably best to live first as in the variation.]
;W[jn]WL[456.729]
;B[im]BL[53.674]OB[6]
;W[in]WL[449.694]
;B[hp]BL[49.476]OB[5]
;W[jq]WL[440.348]
;B[ip]BL[46.078]OB[4]
;W[hr]WL[437.908]
;B[hn]BL[42.908]OB[3]
;W[hm]WL[426.356]C[Losing these two stones is too big, but saving them at h7 is also probably an overplay with the weak group below. If Black had lived with n3 first, then later this cut aji could be used.]
;B[gn]BL[37.284]OB[2]
;W[mq]WL[403.955]
;B[ln]BL[32.589]OB[1]C[Black's in trouble now.]
;W[mn]WL[388.208]
;B[gm]BL[300]OB[15]
;W[hl]WL[384.993]
;B[mr]BL[254.776]OB[14]
;W[lr]WL[375.539]
;B[fl]BL[242.607]OB[13]
;W[ek]WL[361.623]
;B[fk]BL[215.986]OB[12]
;W[fj]WL[354.784]
;B[gj]BL[207.615]OB[11]
;W[fi]WL[302.567]
;B[gi]BL[131.297]OB[10]
;W[gh]WL[284.53]
;B[el]BL[122.148]OB[9]
;W[dk]WL[255.72]
;B[ii]BL[79.453]OB[8]C[j10 seems to make a stronger connection here.]
;W[ol]WL[237.647]
;B[nl]BL[57.959]OB[7]
;W[nm]WL[207.576]
;B[ok]BL[54.813]OB[6]
;W[kj]WL[128.808]C[White finds a sharp cut here, though it feels to me like it's possibly an overplay with the weakness in the surrounding shapes (n13, p12).]
;B[jj]BL[41.958]OB[5]
;W[kk]WL[123.055]
;B[li]BL[40.198]OB[4]
;W[ji]WL[114.447]
;B[ij]BL[37.703]OB[3]
;W[ih]WL[108.855]
;B[ik]BL[31.949]OB[2]
;W[il]WL[105.843]
;B[dl]BL[25.793]OB[1]
;W[cl]WL[102.095]
;B[gk]BL[300]OB[15]
;W[gp]WL[73.02]
;B[go]BL[295.764]OB[14]
;W[hh]WL[59.232]C[The big black group is dead now.]
;B[fr]BL[250.809]OB[13]
;W[fp]WL[39.617]
;B[es]BL[247.335]OB[12]
;W[gq]WL[34.24]
(;B[cn]BL[195.679]OB[11]
;W[dn]WL[229.122]OW[13]
;B[dm]BL[193.496]OB[10]
;W[ck]WL[210.664]OW[12]
;B[ns]BL[145.778]OB[9]
(;W[ps]WL[142.459]OW[11]C[This is a famous tesuji that means Black has no eye (see first variation), but a mistake (see second variation).]
(;B[en]BL[54.591]OB[8]
;W[fo]WL[127.167]OW[10]
;B[js]BL[49.858]OB[7]
;W[jr]WL[115.828]OW[9]
(;B[ks]BL[46.622]OB[6]C[Black has a chance to make the white group a seki (which white k2 at l1 would have prevented) but it's useless as the outside group is dead -- see variation.]
;W[eo]WL[64.686]OW[8]
;B[ls]BL[36.576]OB[5]
;W[gs]WL[59.117]OW[7]
;B[fs]BL[35.411]OB[4]
;W[is]WL[57.111]OW[6]
;B[og]BL[29.161]OB[3]C[Black's last chance before resigning is to kill this group, but even if she succeeds it's not actually enough. There is a danger with situations like this that you struggle and actually end up dying bigger; so if White wants an easy big win instead of a harder even bigger win, he could just play yose at s8 and let Black kill the group.]
;W[ng]WL[52.209]OW[5]
;B[of]BL[25.253]OB[2]
;W[oh]WL[46.492]OW[4]
;B[nf]BL[22.482]OB[1]
;W[mg]WL[44.984]OW[3]
;B[kd]BL[300]OB[15]
;W[ld]WL[42.418]OW[2]
;B[lb]BL[295.334]OB[14]
;W[mc]WL[37.583]OW[1]
;B[kb]BL[293.017]OB[13]
;W[lc]WL[300]OW[15]
;B[jc]BL[275.24]OB[12]
;W[kf]WL[291.825]OW[14]
;B[ke]BL[241.071]OB[11]C[Now it's just desperate flailing about, and White wins by even more. End of comments.]
;W[jg]WL[286.021]OW[13]
;B[je]BL[237.826]OB[10]
;W[qk]WL[280.014]OW[12]
;B[ql]BL[225.328]OB[9]
;W[pk]WL[276.713]OW[11]
;B[om]BL[217.925]OB[8]
;W[rl]WL[263.954]OW[10]
;B[ll]BL[212.612]OB[7]
;W[mm]WL[259.96]OW[9]
;B[rm]BL[204.765]OB[6]
;W[rk]WL[257.224]OW[8]
;B[qm]BL[190.827]OB[5]
;W[pn]WL[246.968]OW[7]
;B[ro]BL[180.707]OB[4]
;W[rn]WL[240.637]OW[6]
;B[sn]BL[179.356]OB[3]
;W[rp]WL[238.62]OW[5]
;B[qi]BL[170.47]OB[2]
;W[qh]WL[226.96]OW[4]
;B[ri]BL[154.657]OB[1]
;W[rh]WL[219.06]OW[3]
;B[pj]BL[300]OB[15]
;W[qj]WL[214.83]OW[2]
;B[ds]BL[295.973]OB[14]
;W[gr]WL[211.279]OW[1]C[White wins by resignation])
(;B[eo]
;W[fn]
;B[em]
;W[gr]
;B[fs]
;W[gs]
;B[ds]
;W[ep]
;B[ks]
;W[ls]
;B[is]))
(;B[os]
;W[ls]
;B[pr]
;W[nr]
;B[qs]
;W[ms])
(;B[ls]C[However Black can make a ko, which is a headache for White.]
;W[ks]
;B[os]
;W[ms]))
(;W[ls]C[So this would be safer to avoid the ko, and also kills the eye. It also ensures White's eyespace.]
;B[pr]
;W[ps]
;B[os]
;W[nr]))
(;B[ns]BL[238.247]OB[11]))
(;B[hp]
;W[hr]
;B[mq]C[This N3 is quite big for points and eyes for both Black and White. In the game, White got this move in sente for the M5 cut, so it was free profit. This kind of reverse sente move is bigger than it may look at first.]))
(;B[lj]
;W[li]
;B[ki]
;W[lh]
;B[jj]C[Perhaps Black should play like this.]))
(;B[cp]
;W[do]
;B[co]
;W[cn]
;B[dr]
;W[er]
;B[cr]
;W[eq]
;B[fo]))
(;W[cn]
;B[pn]
;W[pm]
;B[qn]
;W[qm]
;B[ro]
;W[qo]
;B[rn]
;W[rm]
;B[rp]
;W[qp]
;B[om]
;W[rk]
;B[qk]
;W[rl]
;B[rq]
;W[rr]
;B[sr]
;W[sn]
;B[sm]
;W[sl]
;B[ml]
;W[mm]
;B[nm]
;W[mn]
;B[lm]
;W[ln]
;B[kn]
;W[lo]
;B[lp]
;W[ko]
;B[jo]C[Normally n4 stops this ladder from working, so Black has to ladder to the top left instead -- but k4 makes it work again.]))
(;B[pn]
;W[pm]
;B[qn]
;W[qm]
;B[ro]
;W[qo]
;B[rn]
;W[rm]
;B[rp]
;W[qp]
;B[om]
;W[rk]
;B[qk]
;W[rl]
;B[de]C[Black threatens the o7 ladder. It's very complicated.]))
(;B[pr]C[This descent is considered the punishment for o6.

q2 is another joseki choice when White plays r3 before o6. Compared to the solid connection at p3, Black has more and White less of the corner, but White has solidly defended the cut at r6 and has an aim at n3. However, now White has made the marked exchange, which is bad as it damages n4 and so makes n3 harder to play.]
;W[qn]
;B[qr]
;W[rq]SQ[nn][mo]))
