(;AP[goproblems]AB[rb]AB[qb]AB[pb]AB[pc]AW[ob]AW[oc]AW[pd]AW[pe]AW[pf]AW[oe]AB[qe]AB[qd]AB[qf]AW[qc]AW[rc]AW[qg]AW[rg]AB[pg]AB[ph]AB[qh]AB[rh]AB[pi]AB[nf]AB[md]AB[lc]AB[kd]C[white to live](;W[rd];B[rf](;W[sb](;B[ra]C[CHOICE](;W[pa];B[re](;W[sc](;B[sg]C[CHOICE];W[oa];B[se];W[qa];B[sd];W[sa]C[Well done!RIGHT])(;B[sf];W[oa];B[sd];W[se]C[RIGHT]))(;W[oa];B[sd])(;W[sd];B[sg];W[oa];B[se]))(;W[re];B[sf];W[pa];B[se])(;W[sc];B[pa];W[re];B[sg];W[oa];B[se]))(;B[re];W[sc];B[sf];W[ra];B[sd];W[se]C[favourable ko for white.RIGHT]))(;W[re];B[sf];W[sb];B[se])(;W[sg];B[sh];W[sb];B[sd](;W[se];B[sf]C[Only ko. Thanks BartTM])(;W[sc];B[re]C[Only ko. Thanks BartTM])(;W[ra];B[re])))(;W[rf];B[rd])(;W[re];B[rd])(;W[mb];B[nd];W[rd];B[rf];W[sb];B[od])(;W[nd];B[ne];W[rd];B[of];W[od];B[rf])(;W[ne];B[me](;W[nd];B[nc])(;W[nc];B[nd]))(;W[se];B[rd])(;W[sf];B[rd])(;W[sd];B[rd])(;W[sb];B[rd]))