(;SZ[19]EV[13th Samsung Cup semi final game 2]DT[2008-12-17]PC[Korea]PB[Huang Yizhong]BR[7p]PW[Lee Sedol]WR[9p]KM[6.5]RE[W+R]C[Commentary by Choi MyungHoon 9p,
Copyright by gogameworld.com and weiqi.tom.com.];B[qd];W[dc];B[pq];W[dp];B[de];W[oc]
;B[cc];W[po];B[qo];W[pp];B[qp];W[oq];B[qn];W[pn];B[pm];W[qq];B[pr];W[rq];B[qr]
;W[qm];B[ql];W[rr];B[or];W[rm];B[rn];W[rl];B[rp];W[nq];B[pl];W[qk];B[pk];W[qj]
;B[nr];W[no];B[pj];W[qi]C[The opening proceeds very fast, the big avalanche joseki in the lower right corner was played at one stroke.];B[mq]LB[so:a]C[B37: White didn't strike at 'a' with W36, Black also takes chance and plays hane with B37. Recently all players like to play thickness.];W[mp];B[lq];W[kp];B[qg]C[B41: Now players have realized, no matter how much territory you get, as long as you are thin, the game will be easily overturned in the second half of game.];W[pi];B[nj]
;W[oh]C[B44: It is very obvious that Black wants to take territory, but this way Black could easily become thin. (Piao JiEun: Black is painful now, although he wants to take tenuki and play in the upper left corner first, but Black could easily be sealed off in the upper right corner.)];B[lj]LB[lp:a][on:b][oo:c][np:d][op:e][sm:f][rk:g][od:h]C[B45: Black feels the push at 'a' is a bad move, so he first handles the right side. Since Black didn't play there, White should block at 'a'.

Luo Xihe: With B45 Black should play at 'b', next W 'c', B 'd', W 'e', B 'f', W 'g' and W 'h', this way Black can fight.];W[oe]C[W46 is a little unreasonable. (Park JiEun: the connection of W46 is inevitable, otherwise Black will jump out, White could be easily separated into two groups, Lee Sedol plays thickness and is accumulating strength.)];B[pe];W[of]
;B[pb]LB[lp:a]C[B49: Next White can block the corner or connect at 'a'.];W[cn]C[W50: It seems Lee Sedol is also worried about territory, so he first wants to ensure some points. If the difference in territory is too big, it is very difficult to catch up. This also means keep balance between thickness and territory.];B[lp];W[lo];B[ko]C[B53: Since Black reinforces with B45 in the center, now Black can push and cut.];W[ln];B[jo]C[B55: White can't be sealed off in the center, the common move is to make diagonal in the center (Park JiEun).];W[kn]LB[jj:a][in:b]C[W56: The turn is very thick, if Black jumps to 'a' next, White can cap at 'b'. (Park JiEun)]
;B[jj];W[in];B[jp];W[jn]C[B60: Lee Sedol handles the bottom very thickly.];B[sm];W[rk];B[hp]LB[ci:a][cl:b]C[B63: Huang Yizhong solidly takes territory. Now White should turn to play at top, adequately using his thickness. (Park JiEun)

Luo Xihe: Black should take the whole game into account and make extension at 'a', next W63 and B 'b'.];W[ch]C[W64: Black is difficult to answer. Lee Sedol wants to handle the upper left corner well, then turn to the top naturally. (Park JiEun)];B[db]C[B65: Now White can simply take tenuki and attack Black in the center.]
;W[ec];B[eb];W[cd];B[bc];W[hj]C[W70: The left side is clearly all white's influence, White also tests Black whether to reinforce the center or not. If Black reinforces the center, this is just White's intention, so Black can ignore and play in the upper left.];B[fc]C[B71: Black takes tenuki with great momentum. Especially when facing a strong opponent, you can't lose momentum.];W[ob]C[W72: Today Lee Sedol is really patient. (we though he would attack and cultivate his left side, but he still reinforces the upper right corner and also aims at Black's thinness.)];B[dm]C[B73: Ah, it is surprising and really a proud move! Black is clearly challenging Lee Sedol. Or Black feels his situation is not good? (Park JiEun)];W[ki]C[W74: Lee Sedol finally pulls out the sword.
];B[kj];W[ih]C[W76: Now White's attacking tempo is smooth. Black lacks one move in the upper right corner and can't enclose much territory.]
;B[mm]C[B77: Black prepares to make life locally.];W[ik]C[W78: White plays solidly and dares not turn body around easily; Next Black should answer, taking tenuki is dangerous. However if Black answers in the center, the lonely striking stone of B73 may easily die. (Park JiEun, this move can be imagined but appears a little slow.)];B[cm];W[bn]C[W80: White continues to play thickness, Black is very dangerous in the center if taking tenuki again.];B[di]LB[ll:a][ml:b][lk:c][mk:d][mi:e][mj:f][ni:g]C[If W 'a', through W 'g', Black is dangerous.]
;W[ci];B[dj]LB[ll:a][mh:b]C[When White peeps at 'a', Black can jump to 'b'.];W[dh];B[fi];W[ck];B[dk];W[bl];B[ic]LB[gh:a][gn:b][fq:c]C[Luo Xihe: B89 is a big move but overplay, Black grabs territory crazily. After White seals off at 'a', Black has to connect at 'b', next W 'c' is a huge move.]
;W[gh]C[W90: Now White is difficult to run a territory race and can only attack to take profit.
];B[gn];W[fq]LB[mn:a][mo:b][kl:c]C[W92: White wants Black to connect. Next Black can peep at 'a', W 'b' and Black can reinforce at 'c'.

After this move, it is time for noon break.];B[pc];W[ll];B[ml];W[lk];B[mk];W[mi]
;B[on];W[oo]C[W100: Black didn't reinforce the center but the upper right corner, this is a little unreasonable.];B[mj];W[hd];B[hc];W[fd]C[W104: Before chasing-and-killing, White wants to make thickness on the side.];B[gc];W[fm]C[The timing of W106 appears still early, it is not working now. Perhaps White still aims at the center.];B[cl];W[bk]C[W108: Black makes necessary exchange.];B[fn]
;W[gm];B[em];W[fk];B[do];W[cp]C[W114: Black still needs to reinforce.];B[ep];W[eq];B[gp]C[Black tries all he can to reinforce the defect in the lower left, but Black has to bet his group in the center is alive. Lee Sedol should start general attack in the center.];W[fp];B[fo]LB[ni:a][li:b][lh:c][kh:d][ji:e][oj:f][nn:g][oi:h][mh:i][ph:j][rg:k][og:l][nh:m][jh:n][ii:o][lg:p][kg:q][jg:r][mg:s]C[B119: One obvious tactic is for White to block at 'a', Black can push at 'b' and play atari. In fact, White itself is also thin in the capturing race.]
;W[oi]LB[li:a][lh:b][mh:c][lg:d][ni:e][nh:f]C[W120: Did Lee Sedol calculate clearly? He also feels the aji of blocking is not good.

If B 'a', W 'b', through W 'f', destroying eye space.
If B 'c', W 'a', B 'e' and W 'd'.

We can't see how Black to make life. If Black dies in the center, the game will be over.];B[ii];W[jh]LB[li:a][lh:b][mh:c][lg:d][hi:e][gi:f][hh:g][hg:h][gj:i][fj:j][gg:k][gk:l]C[W122: Black still doesn't look good. If B 'a', then W 'b', B 'c', W 'd', B 'e', through W 'l'.]
;B[hi];W[gi];B[hh];W[hg];B[gj];W[fj];B[lm];W[jk];B[km];W[jl]C[W132: These two exchanges are not that meaningful.];B[gg];W[gk];B[ig]
;W[hf];B[kg]C[B137: It is very complicated, can't see how White should answer.];W[li]C[W138: Due to the bad aji, White simply connects solidly.];B[ni];W[lg]C[W140: Lee Sedol may think killing strongly is dangerous? He seems to make compromise.];B[fh];W[gj];B[nn]C[B143: Black makes life and also gains the maximum profit. Lee Sedol feels he may not need to capture? Now White's territory is indeed not bad.];W[oj];B[ok];W[pf]
;B[lf];W[mg]C[W148: White can't capture Black cleanly therefore makes compromise.];B[je];W[ff]C[W150: Even if Black lives, Black's situation is still not good.];B[nl];W[hr]C[W152 is a very happy sente move.];B[ir]C[B153: White can also play hane next but needs accurate calculation and can't end in gote.];W[ho]C[W154 is an asking move, Black is painful.];B[io];W[hn];B[go]
;W[iq]C[W158: White can further take advantage on the right side.];B[hq]C[B159: Black wants to take sente here.];W[jr]C[W160: Now Black is not leading in territory on the board.];B[jq];W[is];B[qf];W[kr];B[kq];W[kc]C[W166: Lee Sedol feels the right side and top are miai, this move is also very good.];B[cf]C[B167: Black wants to play efficiently, but Black still has cut points at the top.];W[jd]
;B[id];W[ie]C[W170: These several black stones are very difficult to live.];B[ke];W[lc]C[W172: Even if Lee Sedol doesn't kill these several stones, he can still win the game, but now he doesn't want to retreat anymore.];B[jg];W[ji]C[W174: Huang Yizhong concedes the game, Lee Sedol advances to the final.

Overall, Lee Sedol plays very solidly throughout the game, however Huang Yizhong tries to grab territory over aggressively and makes himself thin. Lee Sedol uses his good attacking skill to obtain profit.])