invalid problem set
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life and death
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Problem | 912 |
Created | 2001-07-20 |
Source | Japanese booklet |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 55 secs |
User Attempts |
148 / 2693 |
Solve Ratio Rating | 5 dan |
| rating history |
Black to kill; ko is not enough.
(;
AW[oa][mb][nb][pb][qb][nc][nd]
AB[lb][rb][lc][mc][qc][pd][le][me][ne][oe][qe]C[Black to kill.
]
(;B[pc];W[oc])
(;B[qa];W[pc]
(;B[ma];W[rc])
(;B[rc];W[ma])
)
(;B[ma];W[pc]
(;B[qa];W[rc])
(;B[rc];W[qa])
)
(;B[rc];W[pc])
(;B[oc];W[pc]
(;B[od];W[rc]
(;B[qd];W[ra];B[sb];W[sc];B[ob];W[pa])
(;B[sc];W[rd])
(;B[rd];W[sc]
(;B[qa];W[ob]
(;B[ma]C[RIGHT
])
(;B[ra];W[qd]C[Ko.
])
(;B[qd]C[
];W[ma];B[sd]C[RIGHT
])
(;B[sa];W[qd]C[Ko.
])
(;B[sb];W[qd]C[Ko.
])
)
(;B[ob];W[ra]
(;B[sb];W[qd]C[Ko.
])
(;B[pa];W[sb]C[You could have killed the whole group.
])
(;B[na];W[sb]C[You could have killed the whole group.
])
)
(;B[sd];W[qd]C[Ko.
])
(;B[sb];W[qd]C[Ko.
])
(;B[ma];W[ra])
(;B[qd];W[ra])
)
)
(;B[qa];W[od];B[ma];W[rc])
(;B[rc];W[od])
(;B[rd];W[od])
(;B[ma];W[od];B[qa];W[rc])
)
)
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