(;AB[ae]AB[be]AB[ce]AB[cd]AB[df]AB[dg]AB[cg]AB[ch]AB[ci]AB[bi]AW[de]AW[dd]AW[cc]AW[cf]AW[bf]AW[bg]AW[bh]C[White to capture four black stones.]AP[goproblems]
(;W[ad];B[bc];W[af];B[bd];W[bb]C[RIGHT])
(;W[bd];B[bc]
(;W[af];B[ad];W[bb];B[ah]C[CHOICE])
(;W[ac];B[ad];W[af];B[ab];W[bb];B[ah]C[CHOICE]))
(;W[af];B[ah]C[CHOICE]))