(;AB[be]AB[bf]AB[cg]AB[dg]AB[eg]AB[fh]AB[fi]AB[ej]AB[dj]AB[dk]AB[ck]AB[dl]AB[bn]AB[cn]AB[bo]AB[do]AB[go]AB[gm]AW[bm]AW[cl]AW[bk]AW[cj]AW[ci]AW[ch]AW[bg]AW[eh]AW[ei]AB[aj]AW[ah]C[How to kill? :)]AP[goproblems]
(;B[am]C[]
(;W[bi];B[ai];W[ak];B[af]C[RIGHT])
(;W[bj];B[ai];W[bi];B[af]C[RIGHT])
(;W[ai]
(;B[af]
(;W[bj]
(;B[bh]C[Well done! :)CHOICERIGHT])
(;B[ag];W[bh]C[:(]))
(;W[ag];B[bi];W[bh];B[bj];W[ak];B[bj]C[Well done! :)RIGHT]))
(;B[bi];W[bj]C[:(])
(;B[bj];W[bi]C[:(])
(;B[ak];W[al]C[:(])
(;B[al];W[ak]C[:(])
(;B[bl];W[ak]C[:(])
(;B[cm];W[bj]C[:(])
(;B[bh];W[ag]
(;B[ak];W[al]C[:(])
(;B[af];W[bi]
(;B[ak];W[al]C[:(])
(;B[al];W[ak]C[:(]))
(;B[al];W[ak]C[:(]))
(;B[ag];W[af]C[Leads to ko... :(])))
(;B[ai];W[am]
(;B[af];W[ak]C[:(])
(;B[ak]C[See next problem...])
(;B[cm];W[bl]C[See next problem...])
(;B[bl];W[cm]C[:(]))
(;B[ak];W[al]
(;B[cm];W[bj]
(;B[bl]MA[cl]C[:(])
(;B[af];W[ai]C[:(]))
(;B[bj];W[bi];B[bl]C[:(]MA[bk])
(;B[af];W[bj]C[:(]))
(;B[cm];W[ai]
(;B[af];W[bj];B[bh]C[Well done! :)RIGHT])
(;B[bj];W[bi]C[:(])
(;B[bh];W[bi]C[:(])
(;B[ak]C[See problem #3 in the set...])
(;B[bl];W[ak]C[:(]))
(;B[al];W[am]
(;B[ak];W[bj]C[:(])
(;B[bj];W[bi]C[:(])
(;B[bi];W[bj]C[:(]))
(;B[bi];W[bj]TR[am]TR[ai]C[:(])
(;B[bl];W[ai]
(;B[af];W[bj]
(;B[bh]C[Well done! :)RIGHT])
(;B[ag];W[bh]C[:(]))
(;B[bj];W[al]C[:(])
(;B[ak];W[al]C[:(]))
(;B[af]C[Well done! No eye at B12 anymore... :)RIGHT])
(;B[bh];W[bi]C[:(]))
santa c