(;SZ[19]DT[2002-08-03]SO[http://weiqi.tom.com]KM[5.5]RE[W+0.5]GC[Used in Hikaru no go chapter 184.]EV[15th Fujitsu Cup Final]PC[Nihon Ki-in, Tokyo]PB[Yu Ch'ang-hyeok]BR[9d]PW[Yi Se-tol]WR[3d]US[athos]C[comments from http://weiqi.tom.com 
translated by athos
];B[pd];W[dp];B[pq];W[dd]
;B[qk];W[gq];B[fc];W[id]
(;B[cf];W[fd];B[gd];W[fe];B[ec]
(;W[df]LB[dc:a]C[This is an unusual move. More common is white 'a'. However the position after white 'a' is not very satisfacory.];B[dg];W[ce];B[ef];W[de];B[cb]
(;W[di]C[White 20 is the key point to attack. It is also a new move as far as I know. ];B[he];W[gg]C[White 22 is an unusual shape. Now how to continue?]
(;B[md]C[Black 23 seems the only choice, but no.];W[gc]C[Surprising cutting off from White24.]
(;B[ie]LB[hc:a][hd:b][ge:c][gb:d][hb:e][hf:f][ig:g]C[The counter back from Black25 leads to a firce combat. ];W[gb]
(;B[bc];W[hd];B[ge];W[je];B[ig];W[jd];B[jf];W[dc];B[db];W[ea];B[fb];W[fa];B[da]
;W[le];B[bg]C[Black41 is seeking the phase to make the group at the upper-left corner alive.];W[be];B[ib]C[Correct timing for Black43.];W[hb]LB[jb:a]C[White44 has to be here, if moves at point 'a', when there comes a semeai in the upper-left corner, white still need the move at White44, which white would rather not to.];B[kf];W[ld]LB[fg:a]C[White46 is very bold.

After White46, if black dare to cut-in at point 'a', it is quite possible that the game will come to an instant end.]
(;B[eh];W[ff]LB[ch:a][ba:b]C[Maybe White48 should move at point 'a' first. White is not confident to move at point 'b'.];B[ba];W[gi]LB[ch:a]C[White50 still shall move at point 'a' first, for, if white moves at point 'a' later, black may abandon there.];B[ei];W[dk];B[ek];W[dl];B[el]
;W[gk]LB[ch:a]C[The last chance to move at point 'a'.];B[dm];W[cm];B[dj];W[cj];B[ej];W[ch];B[cn];W[bl]C[Lunch time. Black left 1 hour 35 mins, white 2 hours 7 mins.];B[bm];W[cl]
;B[cg]C[Both sides prefer attacking, so black will not abandon the two stones and moves at Black67.]
(;W[bn];B[dn];W[bo]
(;B[gm];W[ij];B[im]C[Till 73, seems it is OK for black to fight.];W[kj];B[mg]
(;W[km];B[mc];W[lc];B[mj];W[kh];B[hh];W[gh];B[li];W[go];B[gl];W[il]LB[bi:a][ci:b][bh:c][bj:d][af:e]C[White86 is a good point to defend, but not for  attacking black,  since at the left side black can move in the sequence (Black 'a', White 'b', Black 'c', White 'd', Black 'e'), to get an eye, this black group is not in danger.]
;B[fo];W[jm];B[gn];W[gp];B[in];W[jo]LB[lf:a][nf:b]C[White92 can also move at point 'a' or 'b'. Black got another choice...]
(;B[hl];W[lf];B[lg]
(;W[nf]LB[jh:a][kg:b]C[White 96 shall make the exchange (furikawari) of (White 'a', Black 'b') before moves at White96.];B[ik];W[jk];B[jl]
(;W[kl]C[Slip!];B[ji]C[Fierce attack from Black101.]
(;W[ki]C[So white counter back.];B[hj];W[hi];B[jj];W[jh];B[kk];W[kg];B[ih];W[ii];B[jk];W[if];B[hf];W[hg]
;B[lj];W[gf];B[lh];W[if];B[jg]C[But this exchange (till Step119) is an inside-outside exchange, Black get benefit from it. Black leads.

But from now on white moves excellently!];W[np]C[White120 is very sharp.]
(;B[oo]C[But black moved here, with the exchange of White120-Black121, white gaurded its lower-left corner, now white will turn to the upper-right corner.];W[qd];B[qc];W[qe];B[rc]LB[no:a]C[Black125 hope to get the sente to turn to point 'a']
(;W[od]C[Hasami (pincer) from white126, tesuji (nice move).];B[pe];W[pc]C[White 128 is Sharp!];B[pf]C[Black129 will not yield.];W[oc];B[qf]LB[pg:a]C[Maybe Black131 shall block at point 'a', but it is hard to say.

This is an fair exchange till Black131. But White gets the sente.

];W[qo]C[White132, now or never! Yu Ch'ang-hyeok began byo-yomi.];B[rq];W[ql];B[rl]LB[pk:a][no:b]C[Black135 is the fatal slip

Black should move at point 'a', then no matter how white tries to find a way out, black can get point 'b'.]
;W[pk];B[qm];W[pl];B[rk];W[rm]C[White140, tesuji.]
(;B[no]LB[rn:a]C[Black cannot retrieve at point 'a'.
];W[pm];B[qn]
(;W[rn]C[The strategy of white from Step144 is very tricky.];B[pn];W[qj];B[rj];W[qi];B[ri];W[qh];B[rh];W[mo]LB[mp:a]C[Due to its limited liberty, black cannot move at point 'a'.]
(;B[mn];W[mp];B[op];W[oq];B[nn];W[pr]C[Nice moves for White156 and White158. Black feels unconfortable.];B[or];W[nq];B[qr];W[ln];B[ps];W[mm]C[Everybody in the discussion room thought white is leading now. But later analysis shows black still has chance.]

(;B[mr];W[nm];B[pp];W[kr]C[Till Step168 white succeeded in the battle and leads.];B[pb];W[ob];B[qa];W[mb]C[Black lost the chance here.];B[ep];W[eq];B[dq]
(;W[cp];B[fq];W[er];B[fp];W[fr];B[ip]
(;W[jq]C[White182, honte (proper move).];B[ho];W[hq];B[lq];W[jp];B[kq]LB[ir:a]C[Black187 wants to move at point 'a' later.];W[io]LB[iq:a][ir:b]C[Seems White188 shall move at point 'a', so that black cannot move at point 'b'.];B[pj];W[oj]
;B[pi];W[ph];B[oi];W[oh];B[ni];W[og];B[bi];W[qg];B[rg];W[bj];B[mf];W[me];B[ll]
;W[lm];B[kp];W[ko];B[ir]C[Finnaly black jumped in, due to White188's fault. But...];W[jr];B[iq];W[hr];B[hp];W[is];B[hn]C[Till Step213 the game is quite close but white leads.];W[nr];B[ns]
;W[bh];B[ok];W[nk];B[nj];W[om];B[ah];W[mk];B[lk];W[jn];B[gj];W[fj];B[hk];W[fi]
;B[fk];W[ci];B[ai];W[aj];B[ag];W[eo];B[fn];W[do];B[of];W[ng];B[eb];W[ga];B[bd]
;W[en];B[em];W[on];B[po];W[oa];B[ae];W[pa];B[qb];W[bf];B[af];W[nh];B[ke];W[kd]
;B[ml];W[nl];B[mq];W[lo];B[ls];W[ks];B[mh];W[oe];B[rf]C[Till263 white luckily won by 0.5. The battle in the right side leads white to the victory.])
(;W[io];B[ho];W[hp];B[gr];W[hn];B[hq];W[ho];B[ir];W[gs];B[hr];W[dr];B[kq]C[White cannot defend.]))
(;W[co]C[Should be here.];B[fq];W[er];B[fp];W[fr];B[ip];W[io];B[ho];W[hp];B[gr];W[hn];B[hq];W[ho]
;B[ir];W[gs];B[hr];W[fn]C[So that black cannot jump in.]))
(;B[ne]C[Chance 1: here is the place to test white's nurve.];W[oe];B[of]
(;W[mf]C[If white moves here,];B[mb];W[nb];B[pb];W[ob];B[qa];W[lb];B[ma]C[now it's hard for white to kill black now -- ko.])
(;W[me]C[If white moves here,...];B[ng];W[mf]LB[pj:a]C[Black has got the benefit that later it can move at point 'a' to cut the three white stones. Then black can move on normally.]))
(;B[jq]C[Chance 2: here is the place to snicker in.];W[mr];B[eq];W[ep];B[gr];W[hr];B[fr]LB[hq:a])
(;B[ep];W[eq];B[dq];W[cp];B[fq];W[er];B[fp];W[fr];B[ip]
(;W[hr];B[jq];W[io];B[mr])
(;W[io];B[ho];W[hp];B[gr];W[hn];B[hq];W[ho];B[ir];W[dr];B[mr])))
(;B[op]C[If moves here....];W[nq];B[mn];W[lo];B[ng];W[of];B[og];W[ml];B[nl];W[nk]C[white group, home and safe.]))
(;W[pn]C[Normally white will move like this....];B[rn];W[ro];B[sm];W[po];B[mp]C[result: black leads.]))
(;B[rn];W[qn];B[pm];W[om];B[pn];W[on];B[po];W[no];B[oq];W[nq];B[ol];W[nl];B[ok]
;W[nk];B[oj]C[Black cannot afford the komi, definitely.]))
(;W[pe];B[od];W[qh]C[This is the ordianary sequence.]))
(;B[eq];W[ep];B[dq];W[cq];B[cr];W[bq];B[gr];W[hr];B[fr];W[fq];B[ir]C[The aji(potential) in the lower-left corner is quite bad for white. Without White120, black group is alive.])
(;B[nq]C[Black should move here.];W[mq];B[mp];W[no];B[nr];W[lq]LB[kp:a]C[Now black can move at upper-right corner or at point 'a'.]))
(;W[jj];B[lk];W[kk]C[Pros would not like to be used like this.]))
(;W[jh];B[kg];W[kl]C[White shall move like this.]))
(;W[jh];B[kg];W[np];B[oo];W[nf]C[White shall exchange at these two places before jump-in.]))
(;B[nf]C[This move is very big.];W[hl]C[If white tries to attack, ....];B[bi];W[ci];B[bh];W[bj];B[af]C[This group is alive and black will lead.];W[bd];B[ai];W[eo];B[en];W[fp]
;B[fn]
(;B[lb];W[kb];B[mb];W[jb]C[But, is this a better choice? It's hard to judge, even two best players from china cannot agree -- Ma Xiaochun said black will lead like this for it will get much cash at the upper-right part, but Chang Hao said white has gained at the lower-left corner and strengthened the middle part, this is not bearable to black.])))
(;W[mj]LB[km:a]C[White can move here, which will lead to a simple situation and it'll be difficult for black to find enough cash for komi.

In the game white moves at point 'a', which is really a good point, but black takes White76, the situation becomes nervous immediately.])
(;W[kh]C[In fact now it's the timing for white to move here first.];B[hh]C[If black moves as the real game, ...];W[gh];B[li];W[lj];B[mj];W[mk];B[mi]C[black has to defend here, ];W[ll]LB[km:a]C[then white will get a good shape and no need to move at point 'a' any more -- this move can be saved.]))
(;B[hj]C[Black want to move here first...];W[hi]C[.. , but white may counter back like this.]))
(;W[dn]C[The normal move shall be here, but it is wrong.];B[em];W[do];B[bo];W[bp];B[bi];W[ci];B[bj];W[co]C[Black will make an eye and get cash by sente, ...];B[gm]C[... then jump out to attack.]))
(;B[ff];W[eg];B[fg];W[eh]C[Obviously black cannot move like this.])
(;B[fg]C[Unfortunetely here is also no way out.];W[fh];B[gf];W[ff];B[eg];W[hg];B[if];W[ch];B[cg];W[eh];B[bi];W[bh];B[ah]
;W[cj];B[bj];W[ck];B[bk];W[ai];B[aj];W[cl];B[bl];W[bm]C[Blocked. Black will die.]))
(;B[hd]C[Here is the correct move for Black27 and it is the key point. ];W[ic];B[kd]
(;W[kb]C[White must move here first, then black can make eyes for the upper-left corner.

But even so the situation is not good for black, all are Black23's fault.])
(;W[bc]C[If white dare to counter back now...];B[hc];W[hb];B[jb];W[ib];B[jd]C[Black has one more liberty and will kill white.])))
(;B[hc];W[hd];B[ge];W[gb];B[hb];W[ie];B[hf];W[ig]C[If Black 25 moves here, black will not get a satisfying result.])
(;B[hd];W[hc];B[ic];W[ib];B[jc];W[jb];B[kc];W[fb];B[eb];W[gb]LB[mc:a]C[Since Black23 is now not at 'a',  black cannot kill white.]))
(;B[mc]C[This is the right move black should take.];W[gc];B[hd];W[hc];B[ic];W[ib];B[jc];W[jb];B[kc];W[fb];B[eb];W[gb];B[ha]C[White cannot cut in at White 24, or will get killed.]
))
(;W[ge];B[cj];W[cg];B[cm]C[If White 20 moveshere, white will get thickness, but then black will instantly destroy the white moyo in the left side. This is one variation. In fact Yi played this against Yu two months earlier and lost. So that is why he chose the new move.]))
(;W[dc];B[ge];W[df];B[dg];W[gf];B[de];W[ed];B[hc];W[ef];B[ch]C[White would rather not allow black to get such a good result by Black 23.]))
(;B[cc];W[dc];B[cd];W[de];B[db];W[eb];B[cb];W[ec];B[cf];W[nc];B[pf]LB[pb:a][pc:b]C[If black moves at Black9 he will get more cash. This was once a popular result, later white can move at point 'a' or 'b'.]
))