(;AB[ba]AB[bb]AB[bc]AB[bd]AB[cc]AW[cb]AW[db]AW[dc]AW[dd]AW[cd]AB[bf]AW[bg]AW[cg]C[How can white kill? :)FORCE]AW[dg]AW[bh]AP[goproblems]
(;W[ab];B[ac]
(;W[ae];B[af]
(;W[be];B[ce]
(;W[cf];B[ad];W[be]C[Well done! ;)RIGHT])
(;W[ag];B[cf]C[Black's alive!]))
(;W[ce];B[be]C[Black's alive!])
(;W[cf];B[be]C[Black's alive!])
(;W[ag];B[be]C[Black's alive!]))
(;W[af];B[ae]C[Black's alive!])
(;W[be];B[ce]
(;W[af];B[ae]C[Black's alive!])
(;W[ae];B[af];W[cf];B[ad];W[be]C[Well done! ;)RIGHT]))
(;W[ce];B[be]C[Black's alive!])
(;W[cf];B[be]C[Black's alive!])
(;W[ag];B[be]C[Black's alive!]))
(;W[af];B[ae]C[Black's alive!]TR[ab]TR[ac])
(;W[ae];B[af]
(;W[be];B[ce]
(;W[cf];B[ad]C[Black's alive!]TR[ab]TR[be])
(;W[ab];B[cf]C[Black's alive!]))
(;W[ce];B[be]C[Black's alive!])
(;W[ad];B[be]C[Black's alive!])
(;W[ac];B[be]C[Black's alive!])
(;W[ab];B[be]C[Black's alive!])
(;W[cf];B[be]C[Black's alive!]))
(;W[cf];B[be]C[Black's alive!])
(;W[be];B[ce]
(;W[ab];B[ae]C[Black's alive!]TR[ac]TR[cf])
(;W[cf];B[ae]C[Black's alive!]TR[ab]TR[ac])
(;W[ae];B[af]
(;W[cf];B[ad]C[Black's alive!]TR[be]TR[ab])
(;W[ab];B[cf]C[Black's alive!]))
(;W[af];B[ae]C[Black's alive!]TR[ab]TR[ac]))
(;W[ce];B[be]C[Black's alive!])
(;W[ad];B[ae]C[Black's alive!]TR[ab]TR[ac])
(;W[ac];B[ab]C[Black's alive!])
(;W[ag];B[be]C[Black's alive!]))