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