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life and death
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Problem | 2304 |
Created | 2003-05-29 |
Source | some chinese text |
Rating | |
Difficulty | 6 dan |
Average Solve Time | 41 secs |
User Attempts |
160 / 1932 |
Solve Ratio Rating | 4 dan |
| rating history |
There are many ways to kill black, but only one key move to make it all happen. Choose carefully. Hint: Do not shun from weird shape.
(;
GM[1]FF[4]VW[]AP[Many Faces of Go:11.0]
SZ[19]
HA[0]
ST[1]
DT[2003-05-30]
KM[5.5]
RU[Japanese]
AB[rb][qc][pc][ob][nb][ma]
AW[la][lb][mb][nc][oc][md][pd][qd][rd]
C[Kill unconditionally.]
PL[W]
(;W[na];B[pa]
(;W[ma]
(;B[qa]
C[CHOICE]
(;W[rc]
(;B[sb];W[pb]
C[RIGHT
White 3 was the key move.]
LB[ma:3]
)
(;B[oa];W[sb]
C[RIGHT]
))
(;W[pb];B[oa];W[rc];B[qb];W[sb]
C[RIGHT
White 3 was the key move.]
LB[ma:3]
)
(;W[sb];B[sc]
(;W[rc];B[sa];W[pb]
C[RIGHT
White 3 was the key move.]
LB[ma:3]
)
(;W[pb];B[oa];W[rc]
C[RIGHT
White 3 was the key move.]
LB[ma:3]
)
(;W[sa];B[rc])))
(;B[rc]
C[CHOICE]
(;W[sc];B[sb]
(;W[ra];B[qa];W[pb]
C[RIGHT
White 3 was the key move.]
LB[ma:3]
)
(;W[pb];B[qb]
(;W[oa];B[ra];W[pb];B[ob])
(;W[qa];B[ra])
(;W[ra];B[oa])))
(;W[pb];B[qb]
(;W[sc];B[oa])
(;W[oa];B[sd];W[se];B[sc];W[re];B[sa])
(;W[qa];B[ra]))))
(;W[sb];B[sc]
(;W[rc]
(;B[qb]
C[CHOICE]
(;W[ra];B[sa]
C[ko.]
)
(;W[sd];B[ra]))
(;B[sa];W[qa]))
(;W[ra];B[qa])
(;W[sd];B[rc])))
(;W[sb];B[pa]
(;W[na];B[qb]
(;W[ra];B[sc])
(;W[sc];B[ra]))
(;W[qb];B[rc];W[sc];B[na]
(;W[ra];B[pb])
(;W[qa];B[ra])
(;W[pb];B[qa])))
(;W[pa];B[qa]
(;W[pb];B[qb];W[sb];B[sc];W[rc];B[sa];W[sd];B[oa]
C[A is ko.]
LB[sb:A]
)
(;W[na];B[pb]))
(;W[pb];B[pa]
(;W[sb];B[sc]
(;W[rc];B[qb])
(;W[qb];B[qa]))
(;W[rc];B[qb])
(;W[oa];B[qb];W[na];B[ma])))
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