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