The Magic of Kifu

(;EV[3rd Mlily Cup, round 2]DT[2017-06-21]PB[Ryan Li]BR[1p]PW[Chen Yaoye]WR[9p]KM[7.5]RE[B+2.5]SO[Go4Go.net]C[3rd MLily Cup White: Chen Yaoye 9p Black: Ryan Li 1p Round 2, 2017-06-21]AP[Sabaki:0.50.0]CA[UTF-8];B[qd];W[dc];B[pp];W[dq];B[nc];W[dn];B[qj];W[nq];B[pn];W[qq];B[pq];W[pr];B[de];W[ce];B[dd];W[cd];B[ec];W[cf];B[db];W[cc];B[fd];W[qp];B[qo];W[oo];B[po];W[or];B[eg];W[dh];B[fi];W[jc];B[kd];W[jd];B[je];W[kc];B[ld];W[ie];B[if];W[jf];B[ke];W[hf];B[id];W[ig];B[he];W[oc];B[nd](;W[ge];B[if];W[nb];B[ie];W[mb];B[pc];W[od];B[oe];W[ob];B[pe];W[hb];B[mm];W[ij];B[bn];W[lk];B[km];W[nk];B[mj];W[ll];B[lm];W[nm];B[jk];W[om];B[ql];W[pk];B[pj];W[mo];B[jj];W[cp];B[ck];W[ko];B[gp];W[hl];B[in];W[gj];B[jp]C[Moves 78 and 80 were a bit slow. After black gets 81, the game is very close.];W[jm];B[im];W[il]C[The attach and cut is a mistake. White ends in poor shape and the three black stones are light.];B[jl];W[jn];B[jo];W[kn];B[kp]C[this turn is very uncomfortable to answer for white.];W[lo];B[gm];W[gl];B[lj];W[fm];B[lq];W[ki];B[ji];W[mq];B[fq];W[oi];B[oj];W[nj];B[ni];W[ok];B[qk];W[mi];B[nh];W[kj];B[kh];W[li];B[hh];W[ci];B[em]C[This clamp is a good forcing move to settle the group on the left. By pressuring white, black becomes stronger in the process.];W[en];B[fn];W[fl];B[dm];W[fo];B[gn];W[ej];B[cn];W[go];B[io];W[hm];B[hn];W[do];B[ep];W[eo];B[dr];W[cr];B[er];W[hp];B[hq];W[bq];B[bj];W[fh](;B[mh]C[This move did not really make sense. Although it was big, there was no reason to ignore white's attachment. The actual reason why I ignored is related to uncertainty of the life and death of the left group (see variation).];W[eh];B[bp];W[fp];B[gq];W[bo];B[bl];W[gd];B[lc];W[lb];B[gc];W[hc];B[gb];W[hg];B[ih];W[jg];B[jh];W[fe];B[fb];W[qb];B[lh];W[kk];B[rc];W[lr];B[kr];W[lp];B[kq];W[cb];B[ca];W[ba];B[da];W[kl];B[ro];W[rb];B[rq];W[qr];B[ek];W[rp];B[gi];W[fj];B[sp];W[dj];B[dk];W[qc];B[rd];W[pd];B[co];W[ap];B[mr];W[gh];B[bh];W[bi];B[ai];W[bg];B[hj];W[df];B[bb];W[ab];B[aa];W[qe];B[qf];W[ba];B[eq];W[dp];B[aa];W[re];B[rf];W[ba];B[sb];W[rr];B[aa];W[sc];B[sd];W[ba];B[bc];W[bd];B[aa];W[cm];B[bm];W[ba];B[ml];W[mk];B[aa];W[mc];B[md];W[ba];B[fk];W[ee];B[ed];W[gk];B[aa];W[el];B[dl];W[ba];B[sq];W[sr];B[so];W[ho];B[aa];W[iq];B[ip];W[ba];B[nr];W[ir];B[hr];W[hs];B[js];W[is];B[fs];W[os];B[ls];W[ds];B[aa];W[aj];B[ak];W[ba];B[oq];W[on];B[aa];W[cs];B[jr];W[ba];B[qs];W[rs];B[aa];W[gr];B[jq];W[ba];B[np];W[mp];B[aa];W[es];B[gs];W[ba];B[br];W[ne];B[bs];W[cq];B[an];W[ao];B[aa];W[lf];B[kf];W[kg];B[mf];W[ba];B[ar];W[lg];B[mg];W[op];B[aa];W[qm];B[pm];W[pl];B[rm];W[ba];B[ik];W[ch];B[aa];W[of];B[pf];W[ba];B[ah];W[ag];B[aa];W[ic];B[me];W[ba];B[aj];W[ei];B[aa];W[rn];B[qn];W[ba];B[hi];W[ha];B[aa];W[eb];B[ea];W[ba];B[ga];W[ac];B[ns];W[ra];B[se];W[hd];B[cj];W[hk];B[le];W[sa];B[sc])(;B[eh];W[ei];B[fg];W[bl]C[I thought that the group looked dangerous at this point. I did not see a clear way to live.];B[bm]C[Li Xuanhao pointed out this move. Due to potential forcing mvoes in the center and corner, black is alive.];W[cl];B[dl];W[bi];B[aj]LB[bo:B][ek:A]))(;W[qc];B[pd];W[pc]C[White did not have to start the ko yet. I reviewed this game with Li Xuanhao and he pointed out this variation. Black cannot end the ko, and the ko is heavy for black once white starts it. The result in the game was acceptable for white, but this would have been more punishing.];B[od];W[ge];B[if];W[nb];B[ie];W[mb]))