Problem | 3180 |
Created | 2003-10-26 |
Source | |
Rating | |
Difficulty | 16.3 kyu |
Average Solve Time | 30 secs |
User Attempts |
5950 / 14682 |
Solve Ratio Rating | 7 kyu |
| rating history |
Black to kill, nice and easy.
(;AB[sr][rr][qr][pq][oq][np][no][nn][nm][mq][pl][ql][rl][qp]AW[qq][rq][pp][op][oo][on][pn][qn][qo][qm][rm]C[Black to kill white]SZ[19]
(;B[ro];W[rp]
(;B[sp];W[so];B[sn]C[RIGHT])
(;B[sn];W[rn]
(;B[sm];W[so])
(;B[sp];W[so]C[Even if black wins the ko white cannot be killed]))
(;B[sq];W[so]
(;B[rn];W[sn])
(;B[sp];W[rn])
(;B[sm];W[rn])
(;B[sn];W[rn]))
(;B[so];W[sp]
(;B[sq];W[qp];B[sm];W[sn];B[rn];W[sn]C[Snapback])
(;B[sm];W[sn];B[rn];W[sn]C[Snapback])
(;B[sn];W[sm])))
(;B[rp];W[ro]
(;B[sq];W[sn])
(;B[sn];W[sp])
(;B[so];W[sp]
(;B[sq];W[sn])
(;B[sn];W[sm])))
(;B[sq];W[ro]
(;B[rp];W[sn])
(;B[sn];W[rp])
(;B[so];W[rp]))
(;B[sp];W[ro];B[rp];W[so])
(;B[so];W[ro])
(;B[sm];W[ro])
(;B[sn];W[ro]))
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