(;AW[bb]AW[da]AW[ea]AW[eb]AW[ec]AW[dd]AW[cd]AW[ce]AW[cf]AW[cg]AW[bg]AW[ag]AB[af]AB[bf]AB[be]AB[bc]AB[cc]AB[dc]AB[db]AB[ca]AP[goproblems]
(;B[ba]
(;W[ab]
(;B[bd];W[cb];B[ac];W[aa]
(;B[ca]MA[ba]TR[aa]TR[ab]TR[bb]TR[cb]C[Snapback and the second eye for Black!RIGHT])
(;B[ba];W[ca]))
(;B[ac];W[bd]C[Just one eye.])
(;B[cb];W[bd]C[Only one eye.])
(;B[ad];W[bd]))
(;W[ac];B[bd];W[ad];B[cb];W[ab]C[Oddly enough the mag mentions this seki as an alternative to White, but now Black lives in sente.RIGHT])
(;W[bd]
(;B[ab]TR[af]TR[bf]TR[be]C[This would be White's best line of defense. Black lives in gote but cannot rescue the marked stones even if White tenukies. RIGHT])
(;B[ad];W[ab])
(;B[ac];W[ab])
(;B[cb];W[ab])
(;B[aa];W[ac])))
(;B[cb];W[bd]
(;B[ba];W[ab])
(;B[ab];W[ba]))
(;B[bd];W[cb]
(;B[ba];W[aa])
(;B[ab];W[ba]))
(;B[ab];W[ba]
(;B[cb];W[bd])
(;B[bd];W[cb]))
(;B[ac];W[bd])
(;B[aa];W[bd])
(;B[ad];W[bd])
(;B[ae];W[bd]))