(;SZ[13]AB[da]AB[db]AB[dc]AB[fa]AB[ha]AB[hb]AB[hc]AB[fe]AW[cb]AW[cc]AW[cd]AW[dd]AW[ed]AW[gd]AW[hd]AW[id]AW[ic]AW[gc]AW[ib]AP[goproblems]
(;B[fc];W[fd];B[gb];W[ec];B[eb];W[fb]C[ko, black can do betterCHOICE])
(;B[fd];W[fc]C[CHOICE])
(;B[gb];W[ec];B[eb]C[RIGHT]))