(;
GM[1]FF[4]VW[]AP[Many Faces of Go:10.0]
SZ[19]
HA[0]
ST[1]
PB[Stefan Budig, ?d]
PW[Matthew Macfadyen, 6d]
DT[April 1984]
PC[World Amateur Championship 1984. Round 5. Tokyo]
KM[5.5]
RE[W+R]
SO[BGJ 62. July 1984. Page 6.]
WR[6 dan]

C[Copyright British Go Association 1984, 2001 
];B[pc]
C[This game from the fifth round of the World Championships features
a number of instructive mistakes. Comments are based on a discussion
of the game afterwards with Sakai 9 Dan, and on heckles by a
number of other top professionals when the final life and death
problem was being discussed.  
];W[pp];B[cd];W[qe];B[qg];W[oe];B[nd];W[ph]
;B[qd];W[re];B[qh];W[pi];B[pg];W[og];B[qi];W[pj];B[qj]
C[Black 17: This trick play is discussed in Ishida's "Dictionary
of Basic Joseki" - if white 18 is carelessly played at 19(A),
Black wedges in between 6 and 14 and white collapses.  
]LB[og:14][oe:6][pk:A]
;W[ne]
;B[pk];W[md]
(;B[od]
C[Black 21: Should be 22(A) to avoid being shut in so thoroughly.
]LB[mc:A]
;W[mc];B[ob];W[rd];B[nc];W[mb];B[rc];W[nh];B[qn]
C[29 - 33 should all be at 34(A) or one point above - the space
in front of white's big wall is the most important area.  
]LB[ed:A]

;W[ok];B[pl];W[qo];B[ol]
C[29 - 33 should all be at 34(A) or one point above - the space
in front of white's big wall is the most important area.  
]LB[ed:A]
;W[ed];B[ee];W[fe];B[ef];W[dd];B[ce]
;W[cc];B[fd]
C[Black 41 is an overplay, he is ignoring the big wall to the right.
];W[fc];B[gd];W[gc];B[hd];W[hc]
C[White 46' should be 48(A) immediately - 46 gives black a chance
to play 50(B) and get away with his overplay.  
]LB[gf:B][ff:A]
;B[id];W[ff];B[fg]
;W[gf];B[if];W[gg];B[ih];W[fh];B[cg];W[jg];B[ig];W[hi];B[ii]
;W[hj];B[ij];W[hk];B[ik];W[je];B[hf];W[il];B[hl];W[gl];B[hm]
;W[jl];B[kk];W[gm];B[hn];W[kl];B[lk];W[gn]
C[White 76 etc. were questionable - normally White would pull out
the three stones 66, 70, 74 and wait for a chance to attack one
of Black's eyeless groups. In the game variation, black is likely
to be able to live in the lower right corner, after which white
will be short of territory.  
]LB[jl:70][kl:74][il:66]
;B[ho];W[go];B[hp]
;W[gp];B[lp];W[hq];B[iq];W[ir];B[jq];W[ci];B[di];W[cj];B[fi]
;W[dh]
C[White 90 is a blunder - I had failed to see that 96 at 97 would
be refuted by black 96. Having got this wrong, I gave up trying
to attack black, and made some thickness instead. However: 
];B[eg];W[eh];B[gh];W[hh];B[gi]
(;W[ei]
C[White 90 is a blunder - I had failed to see that 96 at 97(A)
would be refuted by black 96. Having got this wrong, I gave up
trying to attack black, and made some thickness instead. However:
(see 99) 
]LB[hg:A][ei:96][gi:95][hh:94][gh:93][eh:92][eg:91][dh:90]
;B[hg];W[fj];B[ge]
C[Black 99: should be at 101(A) - 99 is too small. After 102(B)
the question arises as to whether black is really dead in the
corner. Stefan could not work this out and decided to leave it
for later, but this was wrong. The corner is completely isolated
and cannot affect the rest of the game. If black tries to live
now, white is obliged to try to kill him, later on it may be
enough for white to let black live on a small scale. In the game
Black had to resign without even finding out whether he could
live or not.  
]LB[bo:B][cp:A]
;W[gq];B[cp];W[bo]
(;B[qq]
C[Black 103 - 107: He is trying to kill the whole corner, but 106
is good (it revives some of the potential in the three cutting
stones) and white lives in sente up to 130.  See also variation.
];W[pq];B[pr];W[or];B[qr]
C[Black 103 - 107: He is trying to kill the whole corner, but 106
is good (it revives some of the potential in the three cutting
stones) and white lives in sente up to 130.  
]LB[qr:7][or:6][pr:5][pq:4][qq:3]
;W[mp];B[nr];W[mr];B[nq]
;W[mq];B[lr];W[ns];B[lq];W[rp];B[oq];W[os];B[rq];W[rn];B[qp]
;W[po];B[sp];W[ro];B[ps];W[ms];B[rs];W[rl];B[qm];W[rm]
C[Black resigned.  
])
(;B[bp];W[dq];B[dp];W[dr];B[cn]
C[The consensus of 9 Dan opinion was that black can live. I was
intending to play 4, though A might be better. After 5 white
can try B or C - both are very tricky and the details are left
as an exercise to the reader.  
]LB[cn:5][dr:4][dp:3][dq:2][bp:1][bm:C][bn:B][eq:A]
))
(;W[hg];B[ei]))
(;B[mc]))
