My first problem on goproblems.com, please tell me if something is wrong or if I have to add variation :)
(;AW[ac]AW[bc]AW[cb]AW[db]AW[cd]AB[bd]AB[ad]AB[be]AB[ce]AB[dc]AB[dd]AB[eb]AB[fc]C[White to live.]AP[goproblems]
(;W[ba]
(;B[da];W[ab]C[RIGHT])
(;B[ab];W[da]
(;B[cc];W[bb]C[RIGHT])
(;B[bb]
(;W[cc];B[ea];W[aa]C[RIGHT])
(;W[aa]C[RIGHT]))))
(;W[da];B[ba]C[White has only one eye.CHOICE]
(;W[bb];B[aa])
(;W[ca];B[bb]
(;W[ab];B[cc])
(;W[cc];B[ea]))
(;W[aa];B[ab]
(;W[bb];B[aa])
(;W[ca];B[cc];W[bb];B[ea])))
(;W[ab];B[ba]C[White has only one eye.CHOICE];W[da];B[ea])
(;W[cc]
(;B[ba]C[White has only one eye.CHOICE])
(;B[da]
(;W[ba];B[ab]C[CHOICE])
(;W[ca];B[ea]
(;W[aa];B[bb]C[CHOICE])
(;W[ba];B[ab]C[CHOICE])
(;W[ab];B[ba]C[CHOICE])
(;W[bb];B[aa]C[CHOICE]))))
(;W[bb];B[da]
(;W[ca];B[aa]C[CHOICE])
(;W[aa];B[ca]C[CHOICE];W[ba];B[ea])
(;W[ea];B[fa]
(;W[ca];B[aa]C[CHOICE])
(;W[aa];B[ca]C[CHOICE];W[ba];B[ea])))
(;W[aa];B[da]
(;W[ca];B[bb]C[CHOICE])
(;W[ba]C[CHOICE])
(;W[bb];B[ca]C[CHOICE];W[ba];B[ea]))
(;W[ca]C[White can't make two eye in the corner.CHOICE];B[ba];W[bb];B[aa]))
