(;SZ[9]AB[ad]AB[ae]AB[ce]AB[be]AW[bc]AW[bb]AB[ba]AW[dc]AW[ec]AW[fc]AW[fb]AB[eb]AB[gb]AB[gc]AB[fd]AB[ed]AB[dd]AW[bd]AW[cb]AW[ca]AW[ac]C[Black can't kill White but has the best result. FORCE]AP[goproblems]
(;B[cc]C[FORCE];W[ga])
(;B[cd]C[FORCE];W[ga])
(;B[ea]C[FORCE];W[ga])
(;B[fa]C[FORCE];W[ea]C[FORCE]
(;B[da]C[FORCE];W[db])
(;B[ga]C[FORCE]
(;W[da]C[FORCE]
(;B[cc]C[FORCE];W[cd])
(;B[cd]C[RIGHT]))
(;W[db]C[FORCE]
(;B[cc]C[FORCE];W[cd])
(;B[cd]C[RIGHT]))))
(;B[ga]C[FORCE];W[fa]))