(;AB[qc]AB[pc]AB[od]AB[nd]AB[mc]AW[nc]AW[oc]AW[pd]AW[qd]AW[rc]AW[qb]AW[kc]AW[kb]AW[kd]AB[jd]AB[id]AB[ib]AB[if]AW[ke]AB[kg]AP[goproblems]
(;B[nb];W[ob];B[oa];W[pb]
(;B[me];W[mb])
(;B[md];W[mb]))
(;B[ob];W[nb];B[mb];W[pb]
(;B[me]C[If white tries to save these stones, the fight will be greatly in black's favorRIGHT]TR[kb]TR[kc]TR[kd]TR[ke])
(;B[md]C[If white tries to save these stones, the fight will be greatly in black's favorRIGHT]TR[ke]TR[kd]TR[kc]TR[kb])))