(;SZ[4]AB[ab]AB[aa]AB[ba]AB[ca]AB[db]AB[da]AW[ad]AW[dc]AW[ac]AW[dd]C[FORCE]AP[goproblems]
(;B[bb]C[FORCE];W[bc])
(;B[cb]C[FORCE];W[cc])
(;B[bc]C[RIGHT])
(;B[cc]C[RIGHT])
(;B[bd]C[FORCE];W[bc]C[FORCE]
(;B[bb]C[FORCE]
(;W[cb])
(;W[cc])
(;W[cd]))
(;B[cb]C[FORCE]
(;W[cc])
(;W[cd]))
(;B[cc]C[FORCE];W[cd]C[FORCE]
(;B[bb]C[FORCE];W[cb])
(;B[cb]C[FORCE];W[bb])
(;B[bd]C[FORCE];W[cd]C[RIGHT]))
(;B[cd]C[FORCE];W[cc]))
(;B[cd]C[FORCE];W[cc]C[FORCE]
(;B[cb]C[FORCE]
(;W[bb])
(;W[bc])
(;W[bd]))
(;B[bb]C[FORCE]
(;W[bc])
(;W[bd]))
(;B[bc]C[FORCE];W[bd]C[FORCE]
(;B[bb]C[FORCE];W[cb])
(;B[cb]C[FORCE];W[bb])
(;B[cd]C[FORCE];W[bd]C[RIGHT]))))