Problem	3180
Created	2003-10-26
Source
Rating

Difficulty	11.6 kyu
Average Solve Time	27 secs
User Attempts	4214 / 10348
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]))