(;AB[pq]AB[oq]AB[op]AB[qp]AB[qo]AW[pp]AW[po]AW[pn]AW[qn]AW[qm]AW[ql]AW[pl]AW[pk]AW[om]AB[nl]AB[nm]AB[nn]AB[pj]AB[oj]AB[qj]AB[qk]AB[rm]C[try to save white~]AP[goproblems]
(;W[rp]C[];B[qq]C[Good move! The black answer is forced. What next?];W[rl];B[ro];W[rn]C[White lives.RIGHT])
(;W[rn];B[rl];W[qq];B[rq];W[qr];B[rr];W[rp];B[qs];W[ro];B[qp];W[qo];B[pr]C[White dies]))