(;GM[1]
FF[4]
SZ[19]
RU[japanese]
ST[2]
C[Copyright British Go Association 1986, 1999

]
SO[BGJ 67, April 1986, Page 22]
RE[B+6]
PW[Ronald Schlemper]
PB[Yong-Su Yoo]
;B[qd]
;W[dc]
;B[dp]
;W[pq]
;B[ce]
;W[qo]
C[White 6: Yoo had expected this move.
]
;B[fc]
C[Black 7: An agressive move that leads to early fighting.
]
;W[ed]
;B[fd]
;W[ef]
;B[fe]
;W[ee]
;B[ch]
;W[jd]
C[White 14: Usually played at 16(A).
]
LB[dg:A];B[nc]
C[Black 15: Essential, otherwise white can extend towards 1 and make
a comfortable base.
]
LB[qd:1];W[dg]
C[White 16-28: An old fashioned joseki.
]
;B[cg]
;W[cd]
;B[cb]
C[White 16-28: Note the similarity of black 19, which allows him to capture a stone in sente,
to white 50 in game 1 (06719.go / 06719.sgf).
]
;W[be]
;B[bf]
;W[de]
;B[cf]
;W[db]
;B[bd]
;W[bc]
;B[ae]
;W[bb]
C[White 16-28: An old fashioned joseki.
]
LB[dg:16][cg:17][cd:18][cb:19][be:20][bf:21][de:22][cf:23][db:24][bd:25][bc:26][ae:27][bb:28](;B[if]
C[Black 29: This was apparently described by Schlemper as a 'typical'
overplay by Yoo. Better, in his view, would have been to play at 36(A), see variation. Another option is the shoulder hit one
point above 29. In fact Yoo had not calculated the consequences of
white's cut at 30(B), and was prepared to sacrifice the stones 7, 9  and 11
if necessary.
]
LB[fc:7][fd:9][fe:11][gg:A][he:B];W[he]
;B[hf]
;W[gf]
;B[ge]
(;W[hd]
C[The brutal option is A. See variation.
]
LB[ie:A];B[ff]
;W[gg]
;B[fg]
;W[gh]
;B[fh]
;W[gi]
;B[ke]
C[Another 'overplay', according to Schlemper, but he shys away from
trying to punish it by pushing and cutting at 1and 3 in the variation to move 42.


]
LB[je:A](;W[lc]
LB[je:A];B[fi]
;W[gj]
;B[me]
;W[gb]
C[White 46: White would love to play A, but after black B his group at the top would be in trouble.
]
LB[fj:A][hb:B];B[ek]
;W[gl]
;B[je]
;W[nb]
C[White 50: A serious mistake, this move is too early. In the coming
sequence Black's centre group is much strengthened, white loses all his
territory at the top, and black 67(A) becomes sente. White should have
played at 63(B) or just turned elsewhere.

]
LB[mg:A][kd:B];B[mb]
;W[mc]
;B[lb]
;W[nd]
;B[oc]
;W[kb]
;B[ob]
;W[la]
;B[na]
;W[md]
;B[id]
;W[ic]
;B[kd]
;W[kc]
;B[jc]
;W[ib]
;B[mg]
;W[fb]
C[White 68: A painful necessity.
]
;B[dq]
C[Black 69: How should black defend the right
side? According to Schlemper, a professional would never play this move
and permit white 73(A). If white invades at the 3-3 point, black's extra
thickness would let him launch a severe attack on White's group. Yoo
apparently thought it neither here nor there, whether a professional
would play 73. He couldn't bring himself to play such a 'slow' move. His
idea is to invite 73, then cut at 1 in the sub-variation to move 70.
Although 'bad style' (if the 'proper' cut at 2, white can get a ladder
after 1) this cuts white into two weak groups. The moves to 25 are one
possible continuation.
]
LB[em:A](;W[mi]
;B[ki]
;W[kk]
C[White 72: White avoids the fight, but will have to make a lot of
territory at the bottom to have a chance.
]
;B[em]
;W[oh]
;B[lj]
;W[nk]
;B[lk]
;W[kl]
;B[ll]
;W[km]
;B[lm]
;W[ln]
;B[nm]
;W[mn]
;B[nl]
;W[pk]
;B[pl]
;W[ql]
;B[qm]
C[Black 89 loses three stones, but leaves white with dreadful aji in
the corner, which Black exploits with 109-11, putting him ahead. If
White plays 116'  at 119, then black 117, white takes, black 116, white
connects, black plays one point below 115, and lives.

]
;W[ol]
;B[pm]
;W[om]
;B[on]
;W[ok]
;B[nn]
;W[pn]
;B[kn]
;W[jn]
;B[ko]
;W[jo]
;B[kp]
;W[jp]
;B[mo]
;W[co]
;B[cp]
;W[fo]
;B[en]
;W[fq]
;B[qk]
C[Black 109 loses three stones, but leaves white with dreadful aji in
the corner, which Black exploits with 109-11, putting him ahead.
]
;W[rl]
;B[rm]
;W[rk]
;B[po]
;W[qn]
;B[qp]
(;W[rn]
C[If White plays 116'  at 119(A), then black 117, white takes, black 116, white
connects, black plays one point below 115, and lives.


]
LB[pp:A];B[ro]
;W[sm]
;B[pp]
;W[kq]
;B[mq]
;W[lq]
;B[mp]
;W[bp]
C[White 124: White's only chance is to pull something off on this
side.
]
;B[bq]
;W[bn]
;B[cm]
(;W[br]
C[See 129.
]
;B[cr]
C[Black 129: A mistake. Yoo felt White's efforts were doomed to
failure and so decided to swallow all his stones. It transpires that
black would be safer to follow the variation to move 128.

]
;W[aq]
;B[cq]
;W[bm]
;B[bl]
;W[cl]
;B[bk]
;W[dm]
;B[dn]
;W[cn]
(;B[ep]
C[Black 139: Forced, elsethe variation follows and black loses the fight.
]
LB[ck:A](;W[dk]
C[White 140: A fatal error. White misses a tesuji at 141(A). Black's
best move then is 1 in the sub-variation. But after white 2, black 3 fails: in the
forced sequence to 16 black loses the fight by one liberty. So black
must play 3' at 6, then white 3 and black takes. White's biggest ko
threat is at 8 , black captures, white plays 10 and
lives. Black then has sente to play, eg at A, and the game is still
undecided.
]
LB[ej:A];B[ej]
;W[cj]
;B[bj]
;W[ci]
;B[bi]
;W[dh]
;B[dj]
;W[el]
;B[fl]
;W[fk]
;B[dl]
;W[ao]
;B[am]
;W[el]
;B[fm]
;W[ck]
;B[di]
;W[fj]
;B[ei]
;W[cm]
C[guess
]
;B[dl]
C[guess
]
;W[ar]
;B[bs]
;W[el]
C[guess
]
;B[al]
;W[an]
;B[dl]
C[guess
]
;W[rd]
C[White 168:  Not big enough. Black will connect wherever white
plays.
]
;B[el]
C[guess
]
;W[qc]
;B[qb]
C[Black 171 and 173: He submits in order to play at 181(A) (worth 8
points in reverse sente). After this move black cannot be overhauled.

]
LB[rp:A];W[pd]
;B[rb]
;W[qe]
;B[gm]
;W[il]
;B[gq]
C[(Note however that 177 was a bad exchange for 178.)
]
;W[gr]
;B[fp]
;W[hq]
;B[rp]
C[Black 171 and 173: He submits in order to play at 181 (worth 8
points in reverse sente). After this move black cannot be overhauled.

]
;W[mr]
;B[nr]
;W[lr]
;B[ns]
;W[gp]
;B[of]
;W[pf]
;B[ij]
;W[ji]
;B[jj]
;W[jh]
;B[kj]
;W[kh]
;B[lh]
;W[hl]
;B[kg]
;W[jg]
;B[jf]
;W[hh]
;B[ne]
;W[er]
;B[hj]
;W[ih]
;B[ho]
;W[hn]
;B[go]
;W[gn]
;B[fn]
;W[io]
;B[eo]
;W[hp]
;B[og]
;W[pg]
;B[nh]
;W[ni]
;B[oi]
;W[ph]
;B[mh]
;W[ds]
;B[cs]
;W[tt]
C[sgb: No idea where this was played
]
;B[mk]
;W[nj]
;B[lp]
;W[ms]
;B[rc]
;W[pc]
;B[sd]
;W[se]
;B[sc]
;W[ec]
;B[od]
;W[jb]
;B[pb]
;W[pe]
;B[tt]
C[sgb: No idea wher this was played
]
;W[ac]
;B[jk]
;W[ad]
;B[jl]
;W[jm]
;B[be]
;W[dr]
;B[as]
;W[hm]
;B[ap]
;W[aq]
C[Guess
]
;B[ar]
C[Guess
]
;W[gc]
;B[so]
;W[ld]
;B[le]
;W[jd]
;B[ie]
;W[gd]
;B[ma]
;W[ka]
;B[tt]
C[sgb: No idea where this was played.
]
;W[tt]
C[sgb: No idea where this was played.
]
;B[tt]
C[sgb: No idea where this was played.
]
;W[li]
;B[tt]
C[sgb: No idea where this was played.
]
;W[tt]
C[sgb: No idea where this was played.
]
;B[rf]
;W[re]
C[Black wins by 6 points.

]
)(;W[ej]
(;B[dj]
)(;B[dj]
TR[ej];W[dk]
(;B[el]
;W[cj]
;B[di]
;W[ck]
;B[bj]
;W[ao]
;B[am]
;W[ar]
;B[bs]
;W[ci]
;B[bi]
;W[dh]
;B[ei]
;W[fj]
C[White 140: A fatal error. White misses a tesuji at 141. Black's
best move then is 1 in Dia 6. But after white 2, black 3 fails: in the
forced sequence to 16 black loses the fight by one liberty. So black
must play 3' at 6, then white 3 and black takes. White's biggest ko
threat is at 8 , black captures (at 149 in Fig 2), white plays 10 and
lives. Black then has sente to play, eg at A, and the game is still
undecided.
]
)(;B[ck]
;W[el]
;B[dl]
;W[ao]
;B[fl]
;W[ar]
C[So black must play 3' at 6, then white 3 and black takes. White's biggest ko
threat is at 8 , black captures (at 149 in Fig 2), white plays 10 and
lives. Black then has sente to play, eg at A, and the game is still
undecided.
]
LB[qg:A]))))(;B[ck]
;W[ar]
;B[bs]
;W[do]
;B[eo]
;W[ep]
;B[fr]
;W[gr]
;B[er]
;W[gq]
;B[cs]
;W[ds]
;B[as]
;W[ap]
;B[eq]
;W[fp]
;B[am]
;W[fs]
))(;W[br]
;B[ar]
;W[cr]
;B[cq]
;W[dr]
;B[fp]
;W[gp]
;B[ep]
))(;W[pp]
;B[ro]
;W[oo]
;B[rn]
;W[po]
;B[qq]
C[If White plays 116'  at 119, then black 117, white takes, black 116, white
connects, black plays one point below 115, and lives.


]
))(;W[em]
(;B[fl]
C[See variation to this move - done to make numbering match BGJ.
]
)(;B[fl]
C[Although 'bad style' (if the 'proper' cut at 2, white can get a ladder
after 1) this cuts white into two weak groups. The moves to 25 are one
possible continuation.
]
TR[em]LB[fm:2];W[fm]
C[
]
;B[gm]
;W[hl]
;B[gn]
;W[dk]
;B[fj]
;W[cm]
;B[dl]
;W[cl]
;B[dj]
;W[ck]
;B[dn]
;W[dm]
;B[cn]
;W[cj]
;B[ci]
;W[bn]
;B[bo]
;W[bm]
;B[im]
;W[jj]
;B[lj]
;W[jl]
;B[kn]
)))(;W[je]
;B[jf]
;W[kf]
;B[le]
;W[kg]
;B[ih]
;W[lc]
C[After 4-7 a complicated fight in the centre would ensue.
]
))(;W[ie]
;B[jf]
;W[gg]
C[After 2 and 3, black probably has to abandon his four stones.
]
;B[jb]
C[4-12 is
one possible continuation.
]
;W[ld]
;B[kd]
;W[kc]
;B[ke]
;W[jc]
;B[lc]
;W[kb]
;B[lb]
;W[hc]
C[Black builds thickness and encloses the top,
while white still has some bad aji (eg at A).
]
LB[ib:A]))(;B[gg]
;W[gb]
;B[if]
))