(;AB[dc]AW[ca]AB[cb]AB[ea]AB[eb]AW[fa]AW[fb]AW[gc]AW[bd]AW[cd]AW[ec]AB[dd]AW[ed]AW[de]AB[cc]AB[bc]AW[be]AP[goproblems]
(;B[ba];W[da]
(;B[db];W[ab]
(;B[ac]C[The corner is safeRIGHT])
(;B[ad]C[];W[ac]C[Black dies])
(;B[aa];W[ac]C[Black dies])
(;B[bb];W[ac]C[Black dies]))
(;B[bb];W[db]C[Black dies])
(;B[ab];W[db]C[No need to lose those stones])
(;B[ac];W[db]C[No need to lose those stones, and you have to play at a18 to save the whole group])
(;B[aa];W[ab]C[Black dies]))
(;B[db];W[ac]
(;B[ab];W[ba]C[Black has one eye and dies.])
(;B[ba];W[ab]))
(;B[da];W[db]C[Oh dear])
(;B[bb];W[db]C[Snapback. Oops!])
(;B[aa];W[db]C[Snapback. Oops!])
(;B[ac];W[ba]
(;B[bb];W[db];B[da];W[db])
(;B[da];W[db])
(;B[db];W[bb]C[Black has one eye and dies.])
(;B[ab];W[db];B[da];W[db]))
(;B[ab];W[ba]
(;B[da];W[db])
(;B[bb];W[db];B[da];W[db])))