(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[7.50]
PW[Choi Jeong]PB[Li He]WR[9p]BR[5p]DT[2018-05-01]EV[1st Go Seigen Cup World Women's Championship, semi-final]SO[Go4Go.net]RE[W+Resign]
;B[pd]
;W[dd]
;B[qp]
;W[dq]
;B[co]
;W[oq]
;B[mp]C[very tight pincer]
;W[oo]
;B[pn]
;W[fp]LB[nn:B][qq:A]C[White can go into the corner at A or get out at B, either way the group is fine, so tenuki seems good]
;B[on]
;W[qq]
(;B[rq]C[Why doesn't black play O5 to seal in? - See variation]
;W[pp]
;B[qo]
;W[no]
;B[qr]
;W[nn]TR[fp]C[marked stone working well]
;B[cc]TR[co][hq][iq][jq][kq]C[interesting timing, I would have been more worried abut C5 or the potential for the bottom side to get big]
;W[cd]
;B[dc]
;W[fc]
;B[ec]
;W[ed]
;B[fb]
;W[ck]
;B[cq]
;W[cr]
;B[dp]
;W[eq]
;B[bq]
;W[jq]LB[cm:A][dn:B][br:C]C[clearly that group was fine, although white has follow ups to pressue that group. It's fine for now but has left several forcing moves behind]
(;B[ip]C[good instinct, that bottom side is getting too big, maybe other possibilities though?]
;W[jp]
;B[in]
;W[jo]TR[gq]C[strange to not follow up here... I suppose white has already responded twice and needs at least one more move to solidify the bottom. Some significant aji still exists around G3]
;B[gc]
;W[fd]
;B[bc]
;W[dn]TR[in][ip]C[yup, although no longer as big now black has the marked stones]
;B[bm]
;W[fn]
;B[jj]C[helps the bottom stone and sets up potential invasion aji on the left side]
;W[qf]
;B[qh]
;W[og]TR[pd][qh][on][pn][qo][qp]C[interesting, certainly not that common. Although a quick search on waltheri shows it's definitely played from time to time when the other player has a formation similar to black's in this case. It seems to have been played mostly through the early 2000s and a couple of times in the early 2010s]
;B[pj]
;W[nd]
;B[pc]
;W[oe]C[decent shape for white but it doesn't look like they're doing very much, just floating...]
;B[nb]
;W[jl]
;B[nf]
;W[of]
;B[lk]TR[ld][rd][of][rh][in][ip]C[a strange response, I presume to prepare for an attack on the marked white stones, but I can't see where black can really build territory from such an attack given they have so many places to run quite easily]
;W[lm]
;B[lh]
;W[rd]
;B[rc]
;W[hk]
(;B[lf]C[this seems very slow]
;W[mg]
;B[lg]
;W[qd]
;B[qc]
;W[mf]
;B[me]
;W[md]
;B[ng]
;W[mb]
;B[nc]
;W[mc]
;B[jc]
;W[pe]
;B[ci]C[good, now black has some thickness it needs ot be used somehow]
(;W[cl]C[weird looking move but leela agrees, I'll remember this one]
;B[cg]
;W[gd]
;B[hc]
;W[fh]
;B[ei]
;W[fi]
;B[ej]
;W[fj]
;B[ek]
;W[cm]C[what white was originally aiming at with C8?]
(;B[ef]C[so black sacrifices the corner to try and kill the white wall? that seems like quite a big gamble to me when I count the game as being fairly even]
;W[ff]
;B[fg]
;W[gg]
;B[eg]
;W[br]
;B[gf]
;W[hf]
;B[hg]
;W[ge]
;B[gh]
;W[ig]
;B[gf]
;W[gb]
;B[hb]
;W[gg]
;B[hh]
;W[ih]
;B[gf]
;W[eb]
;B[ga]
;W[gg]
;B[ii]
;W[ke]
;B[gf]
;W[jf]
;B[ie]
;W[if]
(;B[gg]
;W[id]
;B[gl]
;W[fl]
;B[il]
;W[ik]
;B[gk]
;W[fk]
;B[gj]
;W[gi]
;B[hj]
;W[gm]
;B[hl]
;W[io]
;B[jd]
;W[je]
;B[mh]
;W[ld]
;B[bn]
;W[aq]
(;B[or]
;W[nr]
;B[pq]
;W[nq]
;B[hn]
;W[ho]
;B[kn]
;W[jn]
;B[km]
;W[jm]
;B[kl]
;W[lo]
;B[ns]
;W[ms]
;B[os]
;W[mr]
;B[rg]
;W[rf]
;B[bj]
;W[bk]
;B[nm]
;W[mm]
;B[nl]
;W[jk]
;B[hd]
;W[he]
;B[be]
;W[kk]
;B[lj]
;W[bd]
;B[ad]
;W[oh]
;B[el]
;W[em]
;B[ak]
;W[al]
;B[aj]
;W[bl]
;B[ll]
;W[pi]
;B[qi]
;W[oj]
;B[ok]
;W[ob]
;B[oc]
;W[qj]
;B[pk]
;W[rj]
;B[ph]
;W[oi]
;B[qk]
;W[na]
;B[pb]
;W[oa]
;B[pa]
;W[ma]
;B[ra]
;W[cj]
;B[bi]
;W[kb]
;B[ri]
;W[jb]
;B[ib]
;W[sh]
;B[sg]
;W[qg]
;B[rk]
;W[pg]
;B[sj]
;W[hi]
;B[ij]
;W[kj]
;B[ki]
;W[ml]
;B[mk]
;W[nj]
;B[nk]
;W[gn]
;B[eh]
;W[fm]
;B[ji]
;W[df]
;B[cf]
;W[de]
;B[ko]
;W[kp]
;B[po]
;W[op]
;B[ln]
;W[mn]TR[oh][oi][pi][nj][oj]C[black resigns. white seems to be ahead by approximately komi, alot of which was made up during endgame, black allowed white to push a long way into the right side becuase of having to come back to B15 to save the left side group])
(;B[ap]C[the group is just dead, no use trying except for ko threats]
(;W[ao]C[took me a little bit but I think this is the move]
(;B[bp]
;W[do])
(;B[ar]
;W[bl]
(;B[bo]
;W[am])
(;B[am]
;W[bo]
;B[bp]
;W[do])))
(;W[bl]C[also another possibility]
;B[ar]
;W[do]))
(;B[bp]
;W[ao]TR[do][ap]))
(;B[he]C[why not follow through and try to fight the ko?]
;W[gg]
;B[or]
;W[gf]
;B[nq]
;W[be]
;B[bf]
;W[bh]
;B[bi]
;W[eh]
;B[dh]
;W[df]C[probably a bit too dangerous to lose the ko...]))
(;B[bn]
;W[br]
;B[bp]
;W[be]
;B[ef]))
(;W[ei]
(;B[bk]
;W[bj]
;B[cj]
;W[bl]
;B[dk]
;W[cl]
(;B[bi]
;W[ak]
;B[cf]
;W[be]
;B[ef]
;W[gd]
;B[hc]
;W[dg])
(;B[dl]
;W[cm]))
(;B[cf]
(;W[be]
;B[bf])
(;W[bd]
;B[ef]TR[ei]C[this move probably let's white off too easily...]))))
(;B[lc]C[make territory while attackin?]))
(;B[jo]TR[mp]C[trying to use the makred stone a bit more? The shoulder hit just gives it up without a fight]))
(;B[no]
;W[rp]
;B[pj]LB[nn:A][rn:B]C[probably too much to give up, especially given cut aji and end game at A/B]))