(;AW[bs]AW[br]AW[bq]AW[co]AW[cn]AB[cs]AB[cr]AB[cq]AB[dp]AB[dm]AB[cm]AB[em]AB[eq]AB[dk]AB[ck]C[black to kill]AP[goproblems]
(;B[ar]
(;W[cp]
(;B[ap]
(;W[bp]C[CHOICE]
(;B[bn]C[];W[bm]
(;B[bl];W[ao]
(;B[am]C[RIGHT])
(;B[aq]
(;W[am];B[al];W[as]
(;B[an]C[RIGHT])
(;B[aq];W[an]))
(;W[as]
(;B[am]C[RIGHT])
(;B[aq];W[am]))))
(;B[ao];W[bo])
(;B[an];W[ao];B[bl];W[bo])
(;B[aq];W[an])
(;B[am];W[bl]))
(;B[aq];W[bm])
(;B[am];W[bn];B[an];W[ao]C[];B[bo];W[aq])
(;B[bm];W[bn]
(;B[an];W[ao];B[bo];W[aq])
(;B[ao];W[an]))
(;B[an];W[bm]
(;B[bl];W[bn];B[am];W[ao];B[bo];W[aq])
(;B[bn];W[ao]
(;B[bl];W[bo])
(;B[bo];W[am])))
(;B[ao];W[bn]))
(;W[ao];B[aq];W[bp];B[bn];W[bm];B[bl];W[am];B[al];W[as];B[an]C[RIGHT])
(;W[bo];B[bm]C[RIGHT])
(;W[bm];B[bp]C[RIGHT]))
(;B[bn];W[bo])
(;B[bm];W[ap])
(;B[am];W[ao])
(;B[ao];W[bn];B[bp];W[bo];B[aq];W[ap]C[ko])
(;B[an];W[ao]
(;B[ap];W[bp];B[bo];W[bn];B[bm];W[aq])
(;B[bo];W[bp];B[ap];W[bn]))
(;B[aq];W[ap]))
(;W[bp];B[bn]C[RIGHT])
(;W[ao];B[bp];W[cp];B[aq]C[RIGHT])
(;W[bo];B[cp];W[bp];B[bm]C[RIGHT]))
(;B[cp];W[bp]
(;B[bo];W[bn])
(;B[bn];W[bo])
(;B[bm];W[ao]))
(;B[bm];W[ao]
(;B[cp];W[bp])
(;B[bp];W[cp])
(;B[bn];W[bo])
(;B[ar];W[aq]))
(;B[bp];W[cp]
(;B[ap];W[bo])
(;B[ao];W[bo])
(;B[aq];W[bo])
(;B[bo];W[bn])
(;B[bn];W[bo]))
(;B[bn];W[bo])
(;B[am];W[ao]
(;B[ar];W[aq])
(;B[bp];W[cp]))
(;B[ao];W[bn]C[special thanks to Ocho for this variation]
(;B[bp];W[cp]
(;B[aq];W[bo]C[ko])
(;B[bm];W[an]
(;B[do];W[aq])
(;B[aq];W[bo])))
(;B[cp];W[bp])
(;B[aq];W[bp])
(;B[bm];W[an];B[bp];W[cp];B[aq];W[bo]))
(;B[ap];W[bp]
(;B[bn];W[ao])
(;B[ao];W[bn])
(;B[an];W[ao];B[bo];W[bn];B[bm];W[aq]))
(;B[aq];W[bp])
(;B[bo];W[bn]))