invalid problem set
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life and death
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+5
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Problem | 3830 |
Created | 2004-01-29 |
Source | Many Faces of Go |
Rating | |
Difficulty | 9 kyu |
Average Solve Time | 40 secs |
User Attempts |
3443 / 10095 |
Solve Ratio Rating | 5 kyu |
| rating history |
White to kill without Ko.
(;
AB[ab][ad][bd][cc][dc][ea][eb]
AW[aa][ba][ca][be][cd][cf][dd][ec][fc][gb]
C[White to kill.]
(;W[bc];B[bb]
(;W[cb]
(;B[ac]C[CHOICE]
(;W[ae]C[RIGHT White wins!])
(;W[fb];B[db]C[Black lives.])
(;W[fa];B[db]C[Black lives.]))
(;B[db]C[CHOICE]
(;W[ae];B[da]C[Black lives.])
(;W[fa];B[ac]C[Black lives.])
(;W[fb];B[ac]C[Black lives.])
(;W[ac]C[RIGHT White wins!]))))
(;W[ac];B[bb]
(;W[ae];B[bc]C[Black lives.])
(;W[cb];B[bc]C[Black lives.])
(;W[db];B[da]C[Black lives.])
(;W[da];B[db]C[Black lives.])
(;W[fb];B[db]C[Black lives.])
(;W[fa];B[db]C[Black lives.]))
(;W[bb];B[bc]
(;W[ac];B[cb]
(;W[da];B[db]C[Black lives.])
(;W[db];B[da]C[Black lives.])
(;W[ab];B[da]C[Black lives.])
(;W[fa];B[da]C[Black lives.])
(;W[fb];B[da]C[Black lives.])
(;W[ae];B[db]
(;W[ab];B[da]
(;W[ab];B[ba]C[Black lives.])
(;W[ba];B[ab]C[Black lives.]))
(;W[fb];B[ab]C[Ko, but White can do better.])
(;W[fa];B[ab]C[Ko, but White can do better.])))
(;W[fb];B[cb]
(;W[ac];B[da]C[Black lives.])
(;W[da];B[db]C[Black lives.])
(;W[db];B[da]C[Black lives.])
(;W[fa];B[da]C[Black lives.])
(;W[ae];B[da]C[Black lives.]))
(;W[fa];B[cb]
(;W[ac];B[da]C[Black lives.])
(;W[da];B[db]C[Black lives.])
(;W[db];B[da]C[Black lives.])
(;W[fb];B[da]C[Black lives.])
(;W[ae];B[da]C[Black lives.])))
(;W[cb]; B[db]
(;W[ac];B[bc]C[Black lives.])
(;W[bc];B[da]
(;W[ac];B[bb]C[Black lives.])
(;W[bb];B[ac]
(;W[ba];B[bb]C[Black lives.])
(;W[bb];B[ba]C[Black lives.]))
(;W[ae];B[bb]C[Black lives.])
(;W[fb];B[bb]C[Black lives.])
(;W[fa];B[bb]C[Black lives.]))
(;W[bb];B[bc]C[Black lives.])
(;W[ae];B[bc]C[Black lives.])
(;W[fa];B[bc]C[Black lives.])
(;W[fb];B[bc]C[Black lives.])
(;W[da];B[bb]C[Black lives.]))
(;W[db];B[bb]
(;W[fb];B[cb]C[Black lives.])
(;W[fa];B[cb]C[Black lives.])
(;W[cb];B[da]C[Black lives.])
(;W[da];B[cb]C[Black lives.])
(;W[ae];B[da]C[Black lives.])
(;W[bc];B[ac]
(;W[ae];B[da]C[Black lives.])
(;W[fa];B[cb]C[Black lives.])
(;W[fb];B[cb]C[Black lives.]))
(;W[ac];B[bc]
(;W[ae];B[da]C[Black lives.])
(;W[fa];B[cb]C[Black lives.])
(;W[fb];B[cb]C[Black lives.])))
(;W[da];B[bb]C[Black lives.])
)
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