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