(;GM[1]FF[3]SZ[19]
AW[cq][dr][er]AB[co][dp][dq][fq][gq]PL[B]C[Black to play and kill.]
(;B[br]TR[br];W[bq];B[bp];W[ar];B[bs];W[cs])
(;B[bq];W[br];B[bp];W[ar];B[fr]
(;W[es];B[cs];W[bs];B[cr])
(;W[bs]
(;B[cr];W[cs];B[es])
(;B[es])))
(;B[bp]TR[bp];W[bq]))