invalid problem set
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life and death
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Problem | 5303 |
Created | 2004-10-19 |
Name | chinese - 254 |
Source | chinese book |
Rating | |
Difficulty | 11.8 kyu |
Average Solve Time | 50 secs |
User Attempts |
2359 / 6865 |
Solve Ratio Rating | 5 kyu |
| rating history |
(;AB[rs]AB[rr]AB[rq]AB[rp]AW[sp]AW[ro]AW[rn]AW[qn]AW[pn]AW[on]AB[qo]AB[po]AB[pp]AB[op]AW[qp]AW[qq]AW[pq]AW[oq]AW[nr]AW[mr]AW[os]AB[nq]AB[mq]AB[lq]AB[lr]AB[ls]AB[no]AW[qs]C[Black to play and win (no ko)]AP[goproblems]
(;B[pr];W[qr]
(;B[or];W[ps]
(;B[or]
(;W[pr]C[CHOICE];B[ms];W[sq];B[ns]C[RIGHT])
(;W[sq]C[CHOICE];B[ns]C[RIGHT]))
(;B[pr];W[ms])
(;B[ms];W[sq]
(;B[or];W[sr])
(;B[ns];W[sr])))
(;B[ps];W[or];B[ms];W[sq];B[ns];W[sr])
(;B[ns];W[ms]
(;B[or];W[ps])
(;B[ps];W[or]))
(;B[ms];W[sq]
(;B[or];W[ps]
(;B[or];W[sr])
(;B[ns];W[sr]))
(;B[ns];W[sr])
(;B[ps];W[or];B[ns];W[sr])))
(;B[qr];W[pr]LB[ps:Ko?];B[ms];W[sq]LB[ps:Ko?];B[ns];W[sr]LB[ps:Ko?])
(;B[ps];W[qr]
(;B[pr];W[or];B[ms];W[sq];B[ns];W[sr])
(;B[ms];W[pr];B[ns];W[sq];B[or];W[nr];B[mr];W[sr]))
(;B[or];W[pr];B[qr];W[sq];B[ps];W[qs];B[ms];W[sr])
(;B[ms];W[pr];B[qr];W[sq]LB[ps:Ko?];B[ns];W[sr]LB[ps:Ko?])
(;B[ns];W[ms]
(;B[pr];W[qr]
(;B[or];W[ps])
(;B[ps];W[or]))
(;B[qr];W[pr];B[ps];W[qs]))
(;B[sq];W[so];B[pr];W[qr];B[or];W[ps];B[or];W[ss]))
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