invalid problem set
Problem 5396
Created 2004-11-03
Source a chinese book
Rating
Difficulty 7 dan
Average Solve Time 54 secs
User Attempts
154 / 1936
Solve Ratio Rating 4 dan
rating history
A friend of mine once spent well over an hour solving this problem with another 4-dan, and being a nice chap he is, he wanted me to share the pain. And so, here I am sharing it with you :-)
(;AB[pa]AB[pb]AB[oc]AB[nc]AB[lc]AB[kb]AB[ka]AB[ld]AB[le]AW[ja]AW[ib]AW[ic]AW[jc]AW[je]AW[kf]AW[lf]AW[mf]AW[md]AW[nd]AW[od]AW[pd]AW[qc]AW[qb]AW[qa]AW[la]AB[jb]AW[gb]AP[goproblems]
(;W[pc];B[nb]
(;W[na]
(;B[ma]
(;W[oa]
(;B[ob];W[mb];B[mc];W[na]C[RIGHT])
(;B[mc];W[lb]C[RIGHT])
(;B[lb];W[mc]C[RIGHT]))
(;W[mb];B[mc]
(;W[oa];B[ob])
(;W[ob];B[lb])
(;W[ma];B[lb]))
(;W[lb];B[mb])
(;W[mc];B[mb])
(;W[kc];B[lb]))
(;B[mc];W[ma]C[RIGHT]))
(;W[mb];B[mc]
(;W[na];B[lb])
(;W[ob];B[lb]))
(;W[ob];B[oa];W[mb];B[mc];W[na];B[lb])
(;W[mc];B[mb]
(;W[oa];B[ob];W[lb];B[kc])
(;W[lb];B[kc]))
(;W[oa];B[ob]
(;W[mb];B[mc])
(;W[mc];B[mb];W[lb];B[kc])
(;W[kc];B[lb])
(;W[lb];B[kc]))
(;W[ma];B[na])
(;W[lb];B[kc];W[na];B[ma]
(;W[oa];B[ob])
(;W[mb];B[mc]
(;W[ob];B[ma])
(;W[oa];B[ma]))))
(;W[lb];B[kc]
(;W[mc];B[mb];W[nb];B[na])
(;W[mb];B[mc]
(;W[nb];B[na])
(;W[na];B[nb]))
(;W[nb];B[mb];W[mc];B[na]))
(;W[na];B[mb]
(;W[ma];B[mc]
(;W[pc];B[ob];W[kc];B[lb]C[seki])
(;W[kc];B[lb]))
(;W[mc];B[nb]))
(;W[mc];B[mb]
(;W[lb];B[kc];W[nb];B[na])
(;W[nb];B[na])
(;W[kc];B[lb]
(;W[na];B[nb])
(;W[pc];B[ob])
(;W[nb];B[na])
(;W[ob];B[nb])
(;W[oa];B[na])))
(;W[ob];B[nb]
(;W[mb];B[mc];W[pc];B[lb])
(;W[pc];B[oa];W[mb];B[mc];W[na];B[lb])
(;W[na];B[pc]))
(;W[mb];B[mc]
(;W[na];B[nb])
(;W[nb];B[na])
(;W[pc];B[nb];W[na];B[lb])
(;W[ob];B[nb];W[pc];B[lb])
(;W[lb];B[kc]
(;W[nb];B[na])
(;W[na];B[nb])))
(;W[ma];B[mb]
(;W[na];B[mc]C[seki]
(;W[pc];B[ob];W[kc];B[lb]C[seki])
(;W[kc];B[lb]))
(;W[pc];B[ob]
(;W[na];B[mc]C[seki];W[kc];B[lb]C[seki])
(;W[kc];B[lb];W[na];B[mc]C[seki]))
(;W[kc];B[lb]
(;W[na];B[nb])
(;W[pc];B[na]))
(;W[ob];B[pc]))
(;W[nb];B[mb]
(;W[mc];B[na])
(;W[ma];B[ob])
(;W[ob];B[na])
(;W[na];B[mc])
(;W[pc];B[na]))
(;W[oa];B[ob])
(;W[kc];B[lb]
(;W[mb];B[mc]
(;W[nb];B[na])
(;W[na];B[nb]))
(;W[na];B[nb])
(;W[pc];B[nb])
(;W[ob];B[nb])
(;W[mc];B[mb]
(;W[na];B[nb])
(;W[pc];B[ob])
(;W[nb];B[na])
(;W[ob];B[nb])
(;W[oa];B[na]))
(;W[nb];B[mb])
(;W[ma];B[mb]
(;W[na];B[nb])
(;W[pc];B[na])))
(;W[ia];B[nb]))
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