Problem	11788
Created	2008-10-10
Source
Rating

Difficulty	20.3 kyu
Average Solve Time	28 secs
User Attempts	2753 / 6028
Solve Ratio Rating	8 kyu
	rating history

Black to play and kill white group.

(;AW[rb]AW[sb]AW[sc]AW[qc]AW[pc]AW[ob]AW[oa]AB[nb]AB[nc]AB[oc]AB[pd]AB[qd]AB[rd]AB[rc]AB[sd] (;B[qa];W[qb] (;B[ra];W[pa]) (;B[pa];W[ra]) (;B[na];W[ra])) (;B[qb];W[pb] (;B[qa] (;W[ra]C[];B[sa]C[RIGHT]) (;W[pa]C[CHOICE] (;B[na]C[RIGHT]) (;B[ra];W[sa];B[qa]C[RIGHT]))) (;B[na];W[qa]) (;B[ra];W[qa])) (;B[na];W[pb] (;B[qa];W[ra]) (;B[ra];W[qa])) (;B[ra];W[qa] (;B[pb];W[qb]) (;B[na];W[pb])))