(;AP[goproblems]AW[rb]AW[rc]AW[qc]AW[pc]AW[oc]AW[nd]AW[md]AW[ld]AW[kd]AW[kc]AW[kb]AB[ob]AB[pb]AB[qb]AB[nc]AB[mc]AB[lc]AB[na]C[White to play](;W[la];B[ma](;W[mb]C[RIGHT])(;W[qa];B[pa];W[mb]C[RIGHT]))(;W[mb];B[lb];W[la];B[nb]C[CHOICE])(;W[lb];B[mb]C[CHOICE])(;W[ma];B[la]C[CHOICE])(;W[qa];B[pa](;W[la];B[ma](;W[mb];B[nb](;W[lb]C[RIGHT])(;W[ra];B[lb])(;W[ka];B[lb]))(;W[lb];B[mb])(;W[nb];B[mb])(;W[ra];B[lb]))(;W[lb];B[mb])(;W[mb];B[lb](;W[la];B[nb](;W[ka];B[ma])(;W[ma];B[ka]))(;W[ma];B[la])(;W[ka];B[la]))(;W[ma];B[la](;W[lb];B[mb])(;W[mb];B[lb])))(;W[pa];B[qa](;W[la];B[ma](;W[mb];B[nb](;W[lb]C[RIGHT])(;W[ra];B[lb])(;W[ka];B[lb]))(;W[lb];B[mb])(;W[ra];B[lb]))(;W[lb];B[mb])(;W[mb];B[lb](;W[la];B[nb](;W[ma];B[ka])(;W[ka];B[ma]))(;W[ma];B[la]))(;W[ma];B[la](;W[lb];B[mb])(;W[mb];B[lb]))))