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life and death
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Problem | 13860 |
Created | 2010-07-28 |
Name | Comb patterns, Pattern 15 |
Source | All about life and death, Cho Chikun |
Rating | |
Difficulty | 12.5 kyu |
Average Solve Time | 60 secs |
User Attempts |
1306 / 3599 |
Solve Ratio Rating | 6 kyu |
| rating history |
Black to play and live
(;AB[sr]AB[rr]AB[qq]AB[pq]AB[oq]AW[sq]AW[rq]AW[qp]AW[ro]AW[pp]AW[op]AW[np]AB[nq]AB[nr]AW[mq]AW[mr]AW[ns]AW[kr]AP[goproblems]
(;B[ps];W[qs]
(;B[qr];W[os];B[rs]C[RIGHT])
(;B[pr]
(;W[os];B[rs]C[RIGHT])
(;W[rs];B[os]C[RIGHT]))
(;B[or];W[qr])
(;B[os];W[qr]
(;B[pr];W[or])
(;B[rs];W[ss])
(;B[ms];W[rs];B[pr];W[ss]))
(;B[rs]
(;W[os]
(;B[pr]C[RIGHT])
(;B[qr]C[RIGHT]))
(;W[pr]
(;B[or];W[os];B[qr];W[ss])
(;B[qr]C[RIGHT]))))
(;B[os];W[qr]
(;B[pr];W[qs]AW[kr])
(;B[qs];W[pr];B[ms];W[rs]))
(;B[qr];W[ps])
(;B[pr];W[ps]
(;B[qs];W[os])
(;B[os];W[or]C[ko]))
(;B[rs];W[ps])
(;B[or];W[ps]
(;B[os];W[qr];B[ms];W[rs])
(;B[qs];W[os];B[pr];W[qr]))
(;B[qs];W[ps]
(;B[os];W[or];B[pr];W[qr])
(;B[pr];W[os])))
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