invalid problem set
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Problem | 8139 |
Created | 2006-02-20 |
Source | KGS game |
Rating | |
Difficulty | 5.7 kyu |
Average Solve Time | 45 secs |
User Attempts |
826 / 2900 |
Solve Ratio Rating | 4 kyu |
| rating history |
I observed this from a game on kgs. It went quite a few moves without being noticed. Even dan level players can sometimes overlook these things.
(;AB[ag]AB[af]AB[ae]AB[bf]AB[bd]AB[ce]AB[de]AB[df]AB[dd]AB[ed]AB[fd]AB[gd]AB[ff]AB[gf]AB[gg]AB[gh]AB[fh]AB[eh]AB[gi]AB[gj]AB[gk]AW[ah]AW[bg]AW[cg]AW[cf]AW[dg]AW[dh]AW[eg]AW[fg]AW[ef]AW[ee]AW[ei]AW[bk]AW[ck]AW[dk]AW[ek]C[Capture some white stones.]AP[goproblems];B[bh];W[ai]
(;B[ci]
(;W[bi]
(;B[di];W[ch];B[fe];W[bh];B[bj]C[RIGHT])
(;B[ch];W[cj])
(;B[bj];W[ch]
(;B[aj]C[RIGHT])
(;B[di];W[cj])))
(;W[di]C[Probably white's best option];B[aj]C[RIGHT])
(;W[ch];B[di];W[bi];B[fe];W[bh];B[bj]C[RIGHT]))
(;B[bi];W[aj])
(;B[di];W[ci];B[fe];W[dj])
(;B[ch];W[ci];B[fe];W[bi])
(;B[bj];W[aj])
(;B[aj];W[bi]
(;B[ci];W[bj];B[di];W[ch])
(;B[di];W[ci])
(;B[bj];W[ci])))
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