Problem | 9458 |
Created | 2006-11-19 |
Source | No.9401 |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 70 secs |
User Attempts |
77 / 736 |
Solve Ratio Rating | 3 dan |
| rating history |
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(;AB[rb]AB[qd]AB[pd]AB[oc]AB[ob]AW[nb]AW[nc]AW[od]AW[pe]AW[qe]AW[re]AW[nd]C[White to kill. Ko is failure]AP[goproblems]
(;W[pc]
(;B[pb];W[qc]
(;B[qb]
(;W[rc];B[sc];W[rd]
(;B[sb];W[oa];B[pa];W[ra]C[RIGHT])
(;B[oa];W[sb];B[sa];W[qa]C[RIGHT]))
(;W[rd];B[rc]
(;W[sc];B[sb];W[oa];B[pa];W[ra]C[RIGHT])
(;W[oa];B[sc]
(;W[pa];B[qa];W[sa];B[na];W[oa];B[ma]C[Black may run away...])
(;W[sa];B[pa];W[ra]C[RIGHT])
(;W[ra];B[sa];W[sb];B[qa])
(;W[qa];B[ra])
(;W[na];B[pa];W[ra];B[sa];W[sb]C[Ko]))))
(;B[rc];W[rd];B[qb]
(;W[sc]
(;B[sb];W[oa];B[pa];W[ra]C[RIGHT])
(;B[oa];W[sb]C[RIGHT]))
(;W[oa];B[pa];W[sc];B[sb];W[ra]C[RIGHT])))
(;B[qc]C[CHOICE]
(;W[pb];B[rd]
(;W[sc]
(;B[sd]C[CHOICE]
(;W[sb];B[qb]
(;W[oa]
(;B[sa];W[qa]C[RIGHT])
(;B[qa];W[sa]C[RIGHT]))
(;W[pa];B[qa];W[oa];B[sa]C[Ko])
(;W[sa];B[pa])
(;W[ra];B[pa]))
(;W[qb];B[qa];W[oa]
(;B[sb];W[ra]C[RIGHT])
(;B[ra];W[sb]C[RIGHT]))
(;W[ra];B[qb]
(;W[qa];B[pa])
(;W[oa];B[qa];W[sb];B[rc]))
(;W[qa];B[ra]
(;W[sb]C[RIGHT])
(;W[oa];B[sb]))
(;W[sa];B[qb];W[oa];B[sb])
(;W[se];B[qb];W[oa];B[sb]))
(;B[qb];W[oa]
(;B[sd]
(;W[qa];B[ra];W[sb]C[RIGHT])
(;W[sb];B[qa];W[sa]C[RIGHT]))
(;B[sb];W[sd]C[RIGHT])
(;B[qa];W[sb];B[sd];W[sa]C[RIGHT])))
(;W[qb];B[qa]
(;W[oa];B[sc]
(;W[se];B[sd];W[ra];B[sa])
(;W[ra];B[sa]TR[rc]TR[sb];W[se];B[sd])
(;W[sa];B[ra]))
(;W[sd];B[pa]))
(;W[ra];B[qb]
(;W[oa];B[qa];W[sc];B[sd];W[sb];B[sa]C[Black can do Oshitsubushi])
(;W[pa];B[qa]
(;W[oa];B[sc])
(;W[sc];B[oa])))
(;W[sd];B[qb]
(;W[oa];B[sc])
(;W[sc];B[pa])
(;W[pa];B[qa]
(;W[sc];B[oa])
(;W[oa];B[sc])))
(;W[rc];B[sc];W[qb];B[qa]TR[rc]TR[sb]C[])
(;W[sb];B[sc]
(;W[qb];B[qa];W[oa])
(;W[qa];B[ra])
(;W[se];B[sd];W[qb];B[sa])
(;W[ra];B[qb]))
(;W[qa];B[ra]
(;W[sd];B[sc])
(;W[oa];B[sc])
(;W[sc]C[RIGHT]))
(;W[oa];B[sc]
(;W[qb];B[ra])
(;W[qa];B[ra])
(;W[se];B[sd]
(;W[ra];B[qa];W[qb];B[sa])
(;W[qa];B[ra])
(;W[qb];B[ra]))
(;W[ra];B[qa]
(;W[se];B[sd];W[qb];B[sa])
(;W[qb];B[sa];W[se];B[sd])))
(;W[pa];B[qa]
(;W[sc];B[sd]
(;W[sb];B[sa]C[Ko])
(;W[oa];B[sb]))
(;W[sd];B[sc])
(;W[qb];B[oa])
(;W[oa];B[sc])))
(;W[rd];B[pb])
(;W[sc];B[pb])
(;W[sd];B[pb])
(;W[oa];B[pb])
(;W[qb];B[pb])
(;W[pa];B[pb])
(;W[qa];B[pb])
(;W[rc];B[pb]))
(;B[qb];W[pb];B[rd];W[oa];B[qc];W[sc];B[sd]
(;W[qa];B[ra]C[RIGHT];W[sb])
(;W[sb];B[qa];W[sa]C[RIGHT]))
(;B[rc];W[pb]C[RIGHT])
(;B[rd];W[pb];B[qc]
(;W[qb];B[qa];W[oa];B[sc]
(;W[ra];B[sa];W[se];B[sd])
(;W[se];B[sd];W[ra];B[sa]))
(;W[sc];B[qb];W[oa];B[sd]
(;W[qa];B[ra];W[sb]C[RIGHT])
(;W[sb];B[qa];W[sa]C[RIGHT]))
(;W[ra];B[qb];W[oa];B[qa];W[sc];B[sd];W[sb];B[sa]C[Black can do Oshitsubushi])
(;W[sd];B[qb];W[oa];B[sc])))
(;W[qc];B[pc]
(;W[rc];B[qb]
(;W[sb];B[rd];W[sd];B[ra]
(;W[pa];B[sa])
(;W[sc];B[pa]))
(;W[rd];B[pa])
(;W[sc];B[pa])
(;W[sd];B[pa])
(;W[pa];B[rd]))
(;W[qb];B[rc]
(;W[rd];B[qa])
(;W[oa];B[qa])
(;W[qa];B[ra]
(;W[rd];B[pa])
(;W[oa];B[pa]))
(;W[pa];B[pb]))
(;W[rd];B[qb]
(;W[rc];B[pa])
(;W[oa];B[rc]))
(;W[oa];B[qb]
(;W[rd];B[rc])
(;W[pa];B[rc])
(;W[rc];B[rd])))
(;W[rc];B[qc]
(;W[sb];B[ra]
(;W[pb];B[rd];W[sd];B[sa])
(;W[rd];B[pb])
(;W[oa];B[pb])
(;W[pa];B[pb]
(;W[rd];B[oa])
(;W[oa];B[rd];W[sd];B[sa])))
(;W[rd];B[pb]
(;W[sb];B[ra])
(;W[oa];B[sb])
(;W[qa];B[ra]))
(;W[pb];B[rd]
(;W[qb];B[ra]
(;W[oa];B[sd])
(;W[sd];B[sc])
(;W[pc];B[sc])
(;W[sc];B[sb])
(;W[qa];B[pc])
(;W[pa];B[sd]))
(;W[pc];B[qb];W[oa];B[sc]))
(;W[qb];B[pb]
(;W[sb];B[ra])
(;W[ra];B[sb]
(;W[sc];B[qa])
(;W[pa];B[oa])
(;W[oa];B[qa]))
(;W[rd];B[qa]))
(;W[ra];B[sb]
(;W[rd];B[pb])
(;W[pb];B[qb];W[oa];B[qa]
(;W[pc];B[rd])
(;W[rd];B[pc]))
(;W[oa];B[pb]
(;W[rd];B[pa])
(;W[pa];B[qb]
(;W[qa];B[rd])
(;W[rd];B[qa]))))
(;W[oa];B[pb])
(;W[sc];B[pb]))
(;W[rd];B[qc]
(;W[rc];B[pb]
(;W[sb];B[ra])
(;W[oa];B[sb])
(;W[qa];B[ra]))
(;W[sb];B[pb])
(;W[pb];B[pa]
(;W[qa];B[oa]
(;W[qb];B[rc];W[sc];B[sb]
(;W[na];B[pc])
(;W[ra];B[pc]))
(;W[rc];B[qb]))
(;W[sb];B[sc]
(;W[rc];B[qb]
(;W[ra]C[];B[sa]C[Ko])
(;W[sa];B[ra]))
(;W[qb];B[rc])
(;W[sd];B[rc]))
(;W[rc];B[qb]))
(;W[qb];B[pb])
(;W[oa];B[pb]))
(;W[sd];B[pb]
(;W[rc];B[qc])
(;W[qc];B[rc])
(;W[sb];B[qc])
(;W[oa];B[qa]
(;W[qc];B[rc])
(;W[rc];B[qc]))
(;W[sc];B[qc])
(;W[qa];B[ra]
(;W[oa];B[pa];W[qc];B[qb]
(;W[rc];B[sb])
(;W[rd];B[rc];W[pc];B[sc]))
(;W[rc];B[qc])
(;W[qc];B[rc];W[oa];B[qb])))
(;W[sc];B[qb]
(;W[sb];B[pa]
(;W[ra];B[rc]
(;W[pc];B[sd];W[rd];B[sa];W[qc];B[sc])
(;W[sd];B[pc])
(;W[rd];B[pc]))
(;W[rc];B[ra])
(;W[rd];B[ra])
(;W[pc];B[rd]))
(;W[rc];B[sb]
(;W[qc];B[ra]
(;W[pa];B[oa]
(;W[pb];B[pc])
(;W[pc];B[pb]))
(;W[pc];B[pb]))
(;W[rd];B[qc])
(;W[oa];B[pa];W[pc];B[pb])
(;W[pa];B[oa]))
(;W[rd];B[pa])
(;W[oa];B[pa]
(;W[sb];B[ra])
(;W[rc];B[qc])
(;W[pc];B[pb])
(;W[rd];B[qc])))
(;W[sb];B[sc]
(;W[rc];B[qc]
(;W[sd];B[pb]
(;W[ra];B[qa]C[Ko])
(;W[qa];B[ra])
(;W[oa];B[ra]))
(;W[rd];B[pb]
(;W[ra];B[sa]C[Ko])
(;W[qa];B[ra])
(;W[oa];B[ra])))
(;W[qc];B[rc];W[pc];B[qb]
(;W[pb];B[pa])
(;W[rd];B[sa]))
(;W[qb];B[qc]
(;W[pb];B[oa])
(;W[oa];B[pb])
(;W[rd];B[rc]
(;W[pb];B[pa])
(;W[oa];B[pb])))
(;W[sd];B[rc]
(;W[pb];B[oa]
(;W[pc];B[qb]
(;W[pa];B[qa];W[na];B[sa])
(;W[na];B[qa]
(;W[pa];B[sa])
(;W[sa];B[pa])))
(;W[qb];B[pc])
(;W[pa];B[pc])
(;W[na];B[pc]))
(;W[oa];B[pb])
(;W[qa];B[ra];W[oa];B[qb])
(;W[pa];B[oa]
(;W[ra];B[pb])
(;W[pb];B[pc])
(;W[qa];B[ra])
(;W[pc];B[pb])))
(;W[oa];B[qc]
(;W[qa];B[ra];W[pb];B[rd])
(;W[pb];B[rd])
(;W[rd];B[pb];W[rc];B[qa])
(;W[pa];B[rd]
(;W[ra];B[qb]
(;W[pb];B[qa])
(;W[qa];B[pb]))
(;W[pb];B[ra])))
(;W[qa];B[rd]
(;W[ra];B[qb];W[oa];B[pb]
(;W[qc];B[pa])
(;W[pa];B[qc]))
(;W[oa];B[qb]
(;W[pb];B[ra])
(;W[ra];B[pb]
(;W[pa];B[qc])
(;W[qc];B[pa])))
(;W[pb];B[qb]
(;W[pc];B[qc];W[oa];B[ra])
(;W[ra];B[oa]
(;W[pc];B[qc])
(;W[na];B[pc])))
(;W[pa];B[oa];W[ra];B[qb])
(;W[qb];B[ra];W[oa];B[qc]))
(;W[pa];B[qc]
(;W[oa];B[rd];W[ra];B[qb]
(;W[qa];B[pb])
(;W[pb];B[qa]))
(;W[rd];B[pb];W[rc];B[oa];W[ra];B[qb])
(;W[pb];B[rd];W[ra];B[qb]
(;W[oa];B[qa])
(;W[qa];B[oa])))
(;W[rd];B[qb]
(;W[rc];B[pa])
(;W[pa];B[rc];W[pb];B[qa]))
(;W[pb];B[rd]
(;W[qb];B[qa]
(;W[pa];B[ra]
(;W[qc];B[oa])
(;W[pc];B[qc])
(;W[oa];B[qc]))
(;W[oa];B[qc])
(;W[qc];B[pa]))
(;W[oa];B[qb])
(;W[pc];B[qc]
(;W[qb];B[qa];W[oa])
(;W[qa];B[ra])
(;W[se];B[sd];W[qb];B[sa])
(;W[ra];B[qb]))))
(;W[qb];B[pb]C[CHOICE]
(;W[qc];B[rc]
(;W[rd];B[pc])
(;W[oa];B[qa])
(;W[qa];B[pc]
(;W[oa];B[ra])
(;W[rd];B[ra])))
(;W[rc];B[qc]
(;W[sb];B[ra])
(;W[ra];B[sb]
(;W[sc];B[qa])
(;W[pa];B[oa])
(;W[oa];B[qa]))
(;W[rd];B[qa]))
(;W[rd];B[qc])
(;W[oa];B[qc])
(;W[sc];B[qc])
(;W[sb];B[qc]
(;W[rc];B[ra])
(;W[ra];B[rc]))
(;W[ra];B[qc]
(;W[qa];B[pa])
(;W[oa];B[qa])
(;W[rd];B[qa])
(;W[rc];B[sb]
(;W[sc];B[qa])
(;W[pa];B[oa])
(;W[oa];B[qa]))
(;W[sb];B[qa]
(;W[oa];B[sc])
(;W[rc]C[Ko])))
(;W[qa];B[qc]
(;W[oa];B[ra])
(;W[rd];B[pa])
(;W[rc];B[rd]))
(;W[sd];B[qc]))
(;W[pb];B[pc]
(;W[qb];B[qc]
(;W[oa];B[qa])
(;W[rc];B[rd])
(;W[sc];B[sb])
(;W[rd];B[sb])
(;W[sd];B[sb]))
(;W[rd];B[qb]
(;W[rc];B[pa])
(;W[pa];B[oa]
(;W[rc];B[sb])
(;W[na];B[qa]
(;W[rc];B[sb])
(;W[sc];B[rc])
(;W[sb];B[rc]))))
(;W[qa];B[qb]
(;W[oa];B[ra])
(;W[pa];B[oa]))
(;W[rc];B[rd]
(;W[sd];B[qc]
(;W[sb];B[sc]C[Ko])
(;W[sc];B[sb])
(;W[oa];B[sc]))
(;W[qb];B[qc])
(;W[sb];B[qc];W[sd];B[sc]C[Ko])
(;W[sc];B[sd]
(;W[qb];B[qc])
(;W[qc];B[qb])
(;W[sb];B[qc])
(;W[ra];B[qc])
(;W[qa];B[qb];W[oa];B[ra])
(;W[oa];B[qb])
(;W[pa];B[oa]))
(;W[oa];B[qb]
(;W[sd];B[pa])
(;W[pa];B[sc]))
(;W[qa];B[qb]
(;W[oa];B[ra])
(;W[sd];B[pa]))
(;W[pa];B[oa];W[sd];B[qc];W[sc];B[sb]))
(;W[sc];B[qb]
(;W[pa];B[oa]
(;W[rc];B[sb])
(;W[sb];B[rc]))
(;W[rc];B[pa])
(;W[rd];B[rc])
(;W[oa];B[pa])
(;W[sb];B[pa]
(;W[ra];B[rc])
(;W[rc];B[ra])))
(;W[oa];B[qb]
(;W[rd];B[pa])
(;W[pa];B[qa];W[na];B[rd]))
(;W[pa];B[oa];W[rd];B[rc];W[na];B[qc])
(;W[sb];B[rc]
(;W[sc];B[qb])
(;W[qb];B[oa]
(;W[sc];B[sd];W[rd];B[sa];W[sc];B[qa])
(;W[rd];B[sc];W[na];B[qa]))))
(;W[oa];B[pb]
(;W[pa];B[qb])
(;W[rd];B[qc])
(;W[rc];B[qc])
(;W[qc];B[rc]
(;W[rd];B[pc];W[pa];B[qb]
(;W[qa];B[ra])
(;W[sc];B[sb]))
(;W[pa];B[qb]
(;W[rd];B[pc]
(;W[qa];B[ra])
(;W[sc];B[sb]))
(;W[qa];B[ra]))
(;W[qb];B[qa]))
(;W[qa];B[qb];W[pa];B[ra]
(;W[rd];B[rc])
(;W[rc];B[rd];W[sd];B[qc]))
(;W[sc];B[sb]
(;W[qc];B[rc];W[rd];B[pc];W[pa];B[qb])
(;W[rc];B[qc])
(;W[rd];B[rc])
(;W[pa];B[qb];W[qc];B[rc];W[rd];B[pc])))
(;W[pa];B[qb]
(;W[oa];B[rd]
(;W[pb];B[sc])
(;W[qa];B[ra]
(;W[sc];B[sd]
(;W[sb];B[pb])
(;W[pb];B[pc]))
(;W[pb];B[pc])
(;W[sd];B[sc]))
(;W[sc];B[sd];W[pb];B[pc];W[qa];B[ra]))
(;W[rd];B[pb]
(;W[qc];B[oa];W[rc];B[sb])
(;W[sc];B[rc])
(;W[rc];B[qc];W[oa];B[sb])))
(;W[qa];B[qb]
(;W[oa];B[ra]
(;W[pb];B[pc])
(;W[pa];B[pb]
(;W[rd];B[rc])
(;W[rc];B[rd];W[sd];B[qc])))
(;W[pa];B[oa]
(;W[rd];B[rc])
(;W[sc];B[rd];W[sd];B[sb])
(;W[rc];B[rd];W[sd];B[sb];W[sc];B[qc])))
(;W[ra];B[qb]))
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