(;C[B answered W 1 with the marked stone. This is a terrible mistake. Punish him !FORCE]AB[ba]AB[bb]AB[cc]AB[cd]AB[be]AB[bf]AB[cf]AB[df]AW[ca]AW[cb]AW[db]AW[dc]AW[dd]AW[de]AW[ce]AW[ef]AW[eg]AW[dh]AW[eh]AW[ch]AW[bh]AW[ah]AW[af]AB[ae]TR[ae]LB[af:1]AP[goproblems]
(;W[bc]
(;B[bd];W[ac]
(;B[ad]
(;W[ab];B[aa]
(;W[ac]C[RIGHT])
(;W[bc]
(;B[ac]C[CHOICE])
(;B[ab]))
(;W[ab];B[ac]C[CHOICE])
(;W[ag];B[ac]C[CHOICE]))
(;W[aa];B[ab]C[CHOICE]))
(;B[ab];W[aa]C[RIGHT]))
(;B[ac];W[bd]C[RIGHT]))
(;W[bd];B[bc]
(;W[ac];B[ad])
(;W[ad];B[ac])
(;W[ab];B[ad]C[CHOICE]))
(;W[ag]
(;B[ac]C[CHOICE])
(;B[ad];W[bc];B[bd]
(;W[ac];B[ab]C[CHOICE])
(;W[ab];B[ac]C[CHOICE])))
(;W[ac];B[bc]
(;W[ad];B[ab]C[CHOICE])
(;W[ab];B[ad]C[CHOICE]))
(;W[ab]
(;B[ac]C[NOTTHIS]
(;W[bd];B[bc]C[CHOICE])
(;W[bc];B[bd]C[CHOICE])
(;W[ad];B[bd]C[CHOICE])
(;W[aa]))
(;B[bc]
(;W[ad];B[ac]C[])
(;W[ac];B[ad])))
(;W[bg];B[ac]C[CHOICE])
(;W[ad];B[ac]
(;W[bd];B[bc]C[CHOICE])
(;W[bc];B[bd]C[CHOICE])
(;W[ab];B[bd])
(;W[ag];B[bd]C[CHOICE])))