invalid problem set
Problem 4710
Created 2004-06-27
Source NHK Igo-no-jikan 2004.06.27
Rating
Difficulty 8.1 kyu
Average Solve Time 46 secs
User Attempts
1707 / 5725
Solve Ratio Rating 4 kyu
rating history
According to the joseki, now white is to move at R16. Can you as black kill the group when white tenuki?
(I think all the correct paths are ready, but failure paths are insufficient. Please write your requests so that I will add.)
(;AW[qb]AW[qc]AW[pb]AB[ob]AB[oc]AB[pc]AB[pd]AW[qe]AW[re]AW[pe]AB[oe]AB[pf]AB[qf]AB[rf]AW[nc]C[black to kill.]LB[nc:1]LB[pf:2]LB[qc:3]LB[pc:4]LB[pb:5]LB[ob:6]LB[qb:7]LB[oc:8]LB[re:9]LB[rf:10]LB[qe:11]LB[qf:12]LB[pe:13]LB[oe:14]AP[goproblems]
(;B[se]
(;W[rd]
(;B[pa];W[rb]
(;B[sc];W[sd]
(;B[qa];W[ra]
(;B[sb]C[RIGHT])
(;B[qd];W[rc];B[sb]C[RIGHT])
(;B[oa];W[sb]))
(;B[qd];W[rc]
(;B[qa];W[ra]
(;B[sb]C[RIGHT])
(;B[oa];W[sb]))
(;B[ra];W[sb];B[qa]C[RIGHT])
(;B[sb];W[sa];B[qa]C[RIGHT]))
(;B[sb];W[qa]
(;B[sa]C[RIGHT])
(;B[qd]C[RIGHT])))
(;B[qa];W[ra]
(;B[sc];W[sd]
(;B[sb]C[RIGHT])
(;B[qd];W[rc];B[sb]C[RIGHT]))
(;B[sd];W[sc]
(;B[sf];W[qd])
(;B[qd];W[sf]))
(;B[sb];W[sc];B[qd];W[sa])
(;B[oa];W[sc]))
(;B[sb];W[sc]
(;B[qa];W[ra]
(;B[qd];W[sa])
(;B[sf];W[sa]
(;B[sd];W[qd])
(;B[qd];W[sd])))
(;B[sf];W[sa])
(;B[qd];W[sa])))
(;B[rb];W[sb];B[ra];W[sd]
(;B[rc]C[RIGHT])
(;B[qd]C[];W[rc];B[pa]C[RIGHT])
(;B[pa];W[qa]
(;B[rc]C[RIGHT])
(;B[qd]C[RIGHT]))
(;B[qa];W[pa]
(;B[rc];W[sc])
(;B[qd];W[rc])))
(;B[sb];W[rb];B[sc];W[sd]
(;B[qd];W[rc]
(;B[pa]C[RIGHT];W[sa];B[qa]C[RIGHT])
(;B[ra];W[sa];B[sb]C[RIGHT])
(;B[qa];W[pa])
(;B[sa];W[ra]
(;B[sb];W[pa])
(;B[pa];W[sb])))
(;B[sf];W[pa];B[qd];W[rc];B[ra];W[sa];B[sb]C[RIGHT])
(;B[pa];W[qa]
(;B[sa]C[RIGHT])
(;B[qd]C[RIGHT])))
(;B[ra];W[rb];B[sc];W[sd];B[sb];W[sf])
(;B[sc];W[sb]
(;B[sd];W[rc]
(;B[sf];W[ra])
(;B[ra];W[sf]))
(;B[ra];W[sd])
(;B[rb];W[sd];B[sa];W[rc]
(;B[pa];W[sb]C[ko.])
(;B[sb];W[ra]
(;B[pa];W[sb])
(;B[sb];W[pa]))
(;B[qa]C[];W[pa]C[double ko.])))
(;B[sd];W[sc]
(;B[rb];W[ra]
(;B[pa];W[sb])
(;B[sb];W[sf]
(;B[se];W[pa])
(;B[pa];W[se])))
(;B[ra];W[rb])
(;B[sb];W[sf])))
(;W[sc]
(;B[pa]C[RIGHT])
(;B[rb]C[RIGHT])))
(;B[rd];W[qd];B[se];W[rc]
(;B[sd];W[sc]
(;B[sf];W[ra]
(;B[pa];W[sb])
(;B[sb];W[pa]))
(;B[ra];W[sf])
(;B[pa];W[sf]))
(;B[sc];W[sb]))
(;B[qd];W[rd];B[se];W[sc]
(;B[rb];W[ra]
(;B[pa];W[sb])
(;B[sb];W[pa]))
(;B[pa];W[rb]))
(;B[sb];W[qd];B[se];W[sd];B[sf];W[rc];B[sc];W[rb];B[rd]C[ko.])
(;B[pa];W[qd]
(;B[se];W[sd];B[rc];W[sf]
(;B[sg];W[rb])
(;B[qa];W[ra]
(;B[sb];W[rg]C[seki or escape, depending on the right side.])
(;B[sg];W[sb])))
(;B[qa];W[ra];B[sb];W[oa]
(;B[na];W[pa])
(;B[nb];W[pa])
(;B[pa];W[sd]
(;B[na];W[rc])
(;B[rc]C[seki.]))
(;B[sd];W[se];B[pa];W[rc];B[sc]C[seki.]))
(;B[sb];W[qa])
(;B[rb];W[ra])
(;B[sd];W[se];B[qa];W[ra]
(;B[sb];W[rc];B[sc];W[oa]
(;B[pa]C[seki.])
(;B[na];W[pa]))
(;B[oa];W[sb]))
(;B[rc];W[rb];B[qa];W[ra];B[sb];W[sd];B[sc];W[oa];B[pa]C[seki.]))
(;B[rb];W[rc]
(;B[ra];W[qd])
(;B[qd];W[ra])
(;B[se];W[ra])
(;B[sb];W[qd]))
(;B[sc];W[sb];B[rb];W[rc];B[sa];W[sd];B[pa];W[sb]C[ko.]))
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