(;AB[sa]AW[ra]AW[pb]AW[pa]AW[pd]AW[re]AW[se]AB[od]AB[oc]AB[ob]AB[oa]AB[oe]AB[of]AB[pf]AB[rf]AB[qf]AB[sf]AW[rb]AW[rc]AW[rd]C[Black can't kill White but has the best result. FORCE]AP[goproblems]
(;B[pc]C[FORCE];W[qc]C[FORCE]
(;B[pe]C[FORCE];W[qd]C[RIGHT])
(;B[qd]C[FORCE];W[qe]C[FORCE];B[pe]C[FORCE];W[qd])
(;B[qe]C[FORCE];W[qd]C[RIGHT]))
(;B[qc]C[FORCE];W[pc]C[FORCE];B[qe]C[FORCE];W[qd])
(;B[qd]C[FORCE];W[qe]C[FORCE];B[pc]C[FORCE];W[qc]C[FORCE];B[pe]C[FORCE];W[qd])
(;B[qe]C[FORCE]
(;W[pc]C[FORCE]
(;B[qc]C[FORCE];W[qd])
(;B[qd]C[FORCE];W[qc]C[RIGHT]))
(;W[qd]C[FORCE]
(;B[pc]C[FORCE];W[qc]C[FORCERIGHT])
(;B[qc]C[FORCE];W[pc])))
(;B[pe]C[FORCE];W[pc]C[FORCE];B[qe]C[FORCE];W[qd]))