(;CA[shift_jis]SZ[19]AP[MultiGo:4.4.4]GN[SAWMG2012]GC[Michael Redmond 9P]EV[Beijing 2012 SportAccord World Mind Games]
DT[20121212 ]PC[Peking China]PB[Ilya Shiksin ]BR[7D]PW[Daisuke Murakawa ]WR[7P]
KM[7.5]HA[0]RE[W+R]US[www.cyberoro.com]MULTIGOGM[1]
;B[pd];W[dd];B[pp];W[dp];B[cf];W[fc];B[bd];W[qf];B[qi];W[nd];B[pf];W[qc];B[pc];W[pg]
C[This is where Black varied from the more popular variation.]
(;B[of];W[qd];B[qg];W[qe];B[pe];W[rg];B[qh]C[This variation has been seen in pro games, but is a bit rare now. ]
;W[jd];B[mq];W[fq];B[id]LB[qo:A]C[Tjis move started a vicious fight. A move at A would be normal. ]
;W[je]LB[ic:A]C[Playing underneath at A would be submissive. Since Black has a low position on the left, White probably saw this as a chance to take the offensive. ]
;B[gd];W[df];B[dg];W[ef];B[dh];W[hf]LB[pg:A]C[This is already slightly uncomfortable for Black. The A stone still has potential to move out, and even if Black lives on the upper side it will not be a success for him. ]
;B[fd];W[ed];B[gc];W[fb];B[jc];W[kc];B[kb];W[jb];B[ic];W[lb];B[kd];W[lc];B[ib];W[ka]
;B[gf];W[gg]C[At this point Black still can make life on the side (see var).]
(;B[ff];W[fg]LB[if:A]C[Black can still play at A to live as in the previous var. ]
;B[eg];W[he]C[Now the Black group is dead. ];B[hg];W[hh];B[ig];W[jf];B[gb];W[db]
;B[cc];W[hd]C[White also has no eyes, but wins the semeai. ];B[jg];W[gi];B[hc];W[ha]
;B[ga];W[ie];B[kg];W[lf];B[ij]C[Black hopes to squeeze from the center to enclose a large area in the right. ]
;W[gk];B[hl]C[Since Black's upper side group has only 4 liberties, White needs not answer this move. ]
;W[mg];B[kf];W[ke];B[le];W[ld]
(;B[nh];W[mh];B[mi];W[li];B[mj];W[lj];B[ih]LB[mk:A]C[This is inconsistent. It would be more natural for Black to play at A to continue to enclose the right side. ]
;W[qp]C[W is giving B a choice between giving W the corner or allowing him to erase the right side ]
;B[qo];W[po];B[qn]C[B has chosen the side, giving white the corner, so w can feel free to force from the center]
;W[ng];B[og];W[ni];B[oh];W[mk];B[nj];W[lh]LB[nk:A]C[if B plays at A, the right side turns int B terr on a small scale, but since he's lost points on the upper side, obviously he feels this isn't good enough]
;B[lk];W[pq];B[op];W[oq]LB[np:A][qq:B][kk:C]C[now W gives B a choice between A and B. If black chooses A,then W will force from the center with C and then live in the corner.]
;B[qq];W[rp];B[rq]C[B takes the corner but W will get a good shape on the outside in return]
;W[np];B[oo];W[nq];B[kq];W[mp];B[nn];W[lq];B[kp];W[mn];B[mm];W[nm];B[om];W[lm];B[nl]
;W[kk];B[ln];W[lo];B[kn];W[ko];B[jo];W[jn];B[km];W[ll];B[io];W[jm];B[mo];W[lp];B[jl]
;W[nk]LB[oj:A][ok:B]C[If B extends at A, W pushes through at B and B doesn't get much terr on the right, so the tenuki is fine]
;B[kr];W[qr];B[rr];W[ps]C[W is alive on the side];B[fa]C[B activates a yose ko with this sequence]
;W[dc];B[eb];W[ec];B[cb];W[da];B[ee];W[de];B[ge]C[this will be a 1-step yose ko]
;W[ia];B[hi]LB[fi:A][kl:B]C[exchanging 145 for 146 (at A) makes white B more effective, so this is a bad exchange for B]
;W[fi];B[ca];W[ea];B[ce];W[fe];B[mr];W[lr];B[ee];W[kl];B[mn];W[fe];B[ls];W[rs];B[ro]
;W[nr];B[ee];W[il];B[jk];W[fe];B[qb];W[rb];B[ee];W[ik];B[jj];W[fe];B[cp];W[hb]LB[hm:A]
C[although it's a 1-step ko, W finishes it now because he has a move at A; this simplifies the game nicely for W]
;B[dq];W[hm];B[hk];W[im];B[gl];W[gm];B[fl];W[fm];B[em];W[fo];B[en];W[go];B[hq];W[do]
;B[co];W[el];B[ek];W[dl];B[dk];W[fk];B[hj];W[cn]TR[dl][el]C[W sacrifices the marked key stones and will take the lower left corner in return,again simplifying the game]
;B[cl];W[bn];B[dn];W[cq]C[W secures victory at this point. no further comments]
;B[eq];W[ep];B[fr];W[cr];B[gq];W[fp];B[ms];W[ks];B[js];W[ns];B[ks];W[or];B[oj];W[ok]
;B[pk];W[cj];B[bk];W[di];B[bi];W[ch];B[cg];W[bj];B[bm];W[bh];B[ki];W[pb];B[ob];W[qa]
;B[er];W[pj];B[oi];W[oc];B[ol];W[si];B[sj];W[sh];B[rj];W[bp];B[kh];W[hp];B[ip];W[ae]
;B[ad];W[cm];B[an];W[ao])
(;B[me];W[ne];B[mf];W[nf]C[This does not work for Black as White is still connected out into the center. ]))
(;B[if];W[ie];B[he];W[hg];B[ff];W[fg];B[fe];W[eg]C[Alive, but still playable for White. White has thick shape on the outside. ]))
(;B[qe];W[of];B[pe];W[rg];B[og];W[ph];B[nf];W[re];B[rd];W[pi];B[oe];W[ql];B[jd]
C[This would be the more common variation. ]))