invalid problem set
Problem | 4075 |
Created | 2004-03-15 |
Source | Japanese book |
Rating | |
Difficulty | 7 dan |
Average Solve Time | 71 secs |
User Attempts |
226 / 2013 |
Solve Ratio Rating | 3 dan |
| rating history |
Black to live.
(;
AW[ob][nc][pc][rc][rd][oe][re][pf][qf][pg][sg][ph][pi][qi][qk]
AB[qb][rb][qc][qd][qe][rf][qg][qh][rh]
(;B[sh];W[se]
(;B[sc];W[ri]
(;B[sb]
(;W[si]
(;B[sd];W[rg];B[sf]C[RIGHT CHOICE
])
(;B[rg];W[sf]C[CHOICE
])
(;B[sf];W[rg]C[CHOICE
])
)
(;W[sf]
(;B[sd];W[rg];B[rf]C[RIGHT CHOICE
])
(;B[rg];W[si]C[CHOICE
])
)
)
(;B[sf];W[rg])
(;B[rg];W[si])
(;B[si];W[sf])
)
(;B[sf];W[rg])
(;B[rg];W[ri]
(;B[sf];W[si])
(;B[sc];W[si])
)
)
(;B[sc];W[rg])
(;B[se];W[sf]
(;B[sh]
(;W[sd]
(;B[rg];W[ri];B[se];W[sf];B[sb];W[si])
(;B[sb];W[rg])
)
(;W[rg];B[rf])
)
(;B[rg];W[sd]
(;B[sb];W[ri];B[sc];W[sh])
(;B[sh];W[ri];B[se];W[sf];B[sb];W[si])
)
)
(;B[rg];W[ri])
(;B[ri];W[rg])
(;B[sf];W[se]
(;B[sc];W[rg])
(;B[rg];W[ri];B[sh];W[si])
)
)
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