(;CA[gb2312]AP[MultiGo:4.4.3]SZ[19]C[Commentary by Baek Hongsuk 7p,
Copyright by gogameworld.com and weiqi.tom.com.]
EV[8th Chunlan Cup semi final]DT[2010-12-16]PC[China]PB[Gu Lingyi]BR[5p]PW[Lee Sedol]
WR[9p]KM[7.5]RE[W+R]SO[weiqi.tom.com]MULTIGOGM[1]
;B[pd];W[dd]C[Gu Lingyi defeated Jiang Mingju, Lee Changho and Gu Li in this Chunlan Cup.]
;B[qp]C[In National Go tournament, Gu Lingyi and Lee Sedol met once in 2009, Gu Lingyi won the game and ended 19-game losing streak against Lee Sedol.]
;W[dq]C[Lee Sedol defeated Zhou Junxiu, Sun Tengyu and Wang Xi in this Chunlan Cup.]
;B[do]C[The champion prize is 150,000 USD, the runner-up prize is 50,000 USD. Each side has 3 hours in regular time and 5 minutes in overtime.]
;W[co];B[cn];W[cp];B[cf];W[fc];B[dn];W[fq];B[dj];W[oq];B[po];W[qf];B[qi];W[nd];B[pf]
;W[qc];B[pc];W[pg];B[of];W[qd];B[qg];W[qe];B[pe]C[The opening proceeds very fast, it seems both sides have prepared a lot for the opening.]
;W[rg];B[qh];W[mp];B[jd];W[bd];B[kq];W[lq];B[kp];W[mn];B[pq]LB[km:a]C[B37\: Gu Lingyi is a fast-style player, he plays simply and quickly. Two days ago, Lee Sedol magically overturned the game in the end, today his state must have recovered a little. Next the first feeling is to cap at 'a'.]
;W[km]C[W38 is the absolute move and good shape.];B[ho];W[om]C[W40\: In the opening, it forms a situation of Black's thickness vs. White's territory. Gu Lingyi is good at thick games.]
;B[or]LB[ml:a][mk:b]C[With the turn of B41, Black takes territory in the corner and also attacks White as a whole. If White takes tenuki, Black can strike at the vital point at 'a'. So the best for White is to make the large knight's move at 'b', W 'a' is too slow.]
;W[ql]C[W42\: White continues to make the knight's move.];B[nj]C[B43 is also good position. Now White has more territory, but Black is relatively vivid on the board.]
;W[qn]C[W44 is the only move for settling down locally.];B[nq]LB[kj:a]C[B45\: For Black to jump to 'a' is also good.]
;W[ld]C[W46\: Lee Sedol plays one very undisguised move.];B[ml]C[B47\: Gu Lingyi takes tenuki from top and hits the vital point right away, White instantly feels painful.]
;W[mg]C[W48 is good position, Lee Sedol also ignores it. Black should respond.]
;B[nh]LB[mm:a]C[B49\: White takes advantage in these two exchanges. But the question is still, how White to dodge in the lower right corner. Next White needs to bump at 'a'.]
;W[mm]LB[gc:a][kf:b]C[W50 is absolute. Next Black can attack White at top first, like, after attaching at 'a', Black can make the knight's move at 'b'.]
;B[jf]C[B51\: Black plays very thickly.];W[mi]C[W52 is a good move? It looks very sharp, Gu Lingyi starts to ponder for the first time.]
;B[lf]C[B53\: Gu Lingyi plays very strongly. If White responds, White will become over-concentrated.]
;W[ni]LB[oi:a][oj:b]C[W54\: White treats lightly the two stones at top. Next if Black blocks at 'a', White will cut at 'b'.]
;B[oh]LB[mh:a]C[B55\: Black steps aside. Next White should connect at 'a'.];W[mh]
;B[mf];W[ke];B[kf]C[B59\: White wants to push and cut.];W[je];B[ie];W[id];B[jc]
;W[ic]C[W64\: Black decides to kill, now it comes a game-decisive point.];B[ib]
;W[hb];B[kb];W[ia]LB[mc:a]C[W68\: Black can only make the knight's move at 'a' if Black wants to kill. But the result is not to Black's advantage. White adds 10 points and gets to play first in the center, White would be favorable. Black may initiate the ko fight.]
;B[nl]C[B69\: Black takes tenuki.];W[ll]C[W70 is also one game-decisive move. With B69 Black should peep at 70, now how Black to respond?]
;B[lk];W[kk];B[lj]C[B73\: Black can only capture four stones in the center.];W[kj]
C[B73\: White continues to press. Even if four white stones are captured, White's situation is really very good.]
;B[jl];W[kl]C[After this move, it is time for noon break.];B[li]C[B77 is the only move. Next let's see if White captures at top or connect in the center?]
;W[ol];B[oj]C[B79\: White first makes exchange in sente.];W[mk]C[B79\: White should capture at top, otherwise White incurs too big loss in territory in this round.]
;B[nk];W[op]C[W82 is a very clever move.];B[nm];W[on]C[W84\: White simply wants to connect to the center? Don't know White's real purpose is.]
;B[nn];W[oo]C[W86\: Now White can be pushed and separated, is it troublesome for White? Lee Sedol may judge that he can take big advantage at bottom.]
;B[mo];W[nr]C[W88\: Black needs to connect.];B[pr];W[ij];B[lo];W[if];B[he];W[jb]
C[W94\: Black sacrifices at top and decides to kill the big dragon at bottom and fight for victory. The exchange of W92 and B93 looks bad for now, but in the long run White wants to prepare for dodging.]
;B[mr]C[B95 is sente, White also should live.];W[rj]C[B95\: After White captures at top, White is leading in territory, but Black becomes very thick. Afterwards how White to dodge in the center is the key for the game.]
;B[ig]C[B97\: Black can only play atari this way.];W[hl]C[W98\: It seems White is not easy to be killed in the center.]
;B[gj];W[ih];B[ji]C[B101\: This is very important game-decisive play, but both sides still play very fast.]
;W[jh];B[ki];W[ii]C[W104\: White in the center can't be killed.];B[kh];W[gi];B[fi]
;W[fh];B[gh];W[gg];B[hi];W[hh];B[hf];W[gi]C[W114\: White initiates a ko fight. However Black has more ko threats.]
;B[qj];W[ei];B[qb];W[rb];B[ob]C[B119\: Now White in the lower right corner is pure life-and-death problem.]
;W[qa]LB[kc:a]C[W120\: If Black connects at 'a', there will be a loophole at top, but for White to eliminate the ko in the center is even bigger.]
;B[pa]C[B121\: Gu Lingyi has no follow-up tactic in the lower right corner, then B115 is a big mistake.]
;W[pb];B[fj];W[oa]C[W124\: Lee Sedol eliminates the ko. The exchanges with W116 and B123 are huge. White gains a lot in this round.]
;B[gh]C[W124\: Black may still make trouble for White in the center. If Black has no life-and-death problem, White basically wins the game for sure.]
;W[eg]C[W126\: Lee Sedol responds with the strongest move.];B[dh];W[gi];B[rm];W[rk]
C[W130 is the correct move.];B[rn]C[B131\: At any rate Gu Lingyi finds the tactic of gaining advantage by B129 and B131.]
;W[rh];B[gh];W[eh];B[ej];W[gi]C[W136\: Black handles very good, better than expected.]
;B[ri];W[si];B[gh];W[di];B[hg];W[gi]C[W142 again is the strongest move.];B[qm]C[B143 is a clever ko threat, White has to respond.]
;W[pk];B[gh];W[hn];B[in];W[gi];B[sj];W[sh];B[gh]C[B151\: White may find ko threats in the center? White already has no other ko threats.]
;W[gn];B[il];W[gi];B[pm];W[qk];B[gh];W[ik];B[go];W[gi];B[rf];W[sk];B[gh]C[B163\: Black almost uses all the ko threats.]
;W[fo];B[fp];W[io]C[W166\: It seems Black is far-fetched.];B[fn]LB[jn:a]C[B167\: White can play atari at 'a'. Black plays a little strangely in this round.]
;W[jo];B[gq];W[ci];B[im]C[B171\: Black's play is still a little weird.];W[hm];B[hk]
;W[fm];B[gl];W[en];B[eo];W[hj];B[gk];W[gi]C[W180\: White connects back and increases territory. White has 70+ points, Black is very difficult to have 70 points.]
;B[mc];W[fr];B[kc];W[nb];B[mb];W[gr]C[W186\: White gains in this exchange. Now White is better on the board.]
;B[gm];W[oc];B[md];W[bk];B[fe];W[ee];B[np];W[ne];B[nf];W[pj];B[oi];W[pn];B[hq];W[hr]
;B[iq];W[bn];B[bm];W[bo];B[fd];W[ed];B[gc];W[gb];B[cl];W[no];B[ns];W[ko];B[ln];W[lm]
;B[lp];W[ff]C[Overall\: In the opening both play very fast. From W46, a fight starts. W52 is good feeling, through W68 White's tempo is good. But from B69, the situation again starts to change. After White captures with W94 at top and the outcome of the game is subject to the big dragon's life-and-death in the center. Afterwards Black has big illusion when finding ko threat of B115. After White eliminates the ko fight with W116, White becomes favorable. Then Black starts the ko fight again with B141, but Lee Sedol dodges flawlessly, the distance between them gets bigger.])