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