(;AB[qj]AB[ri]AB[qh]AB[qg]AB[rg]AB[sh]AB[pf]AB[pe]AB[pd]AB[pc]AB[qd]AW[qf]AW[rf]AW[qe]AW[rd]AW[qc]AW[qb]AW[oc]AW[nc]AW[ne]AW[of]AW[og]AW[pg]AW[qi]AW[pi]AW[oi] AP[goproblems]
(;B[rc]
(;W[rb]
(;B[re];W[se]
(;B[sf];W[sg]C[CHOICE Ko. This is the best for black.RIGHT])
(;B[sc];W[sf])
(;B[sg];W[sf]))
(;B[sc];W[sb])
(;B[sf];W[re])
(;B[pb];W[sc]))
(;W[re]
(;B[sd];W[rb];B[sb]C[CHOICE Ko. This is best for black.RIGHT])
(;B[rb];W[pb];B[sf];W[oe])
(;B[pb];W[rb])
(;B[sc];W[pb])))
(;B[re];W[sf]
(;B[rc];W[se]
(;B[rb];W[pb]
(;B[sd];W[sc];B[sb];W[oe])
(;B[sc];W[oe]))
(;B[sc];W[rb])
(;B[sb];W[rb]))
(;B[sg];W[se])
(;B[pb];W[rb]))
(;B[sf];W[re])
(;B[se];W[re])
(;B[pb];W[rb])
(;B[rb];W[rc]))