(;AW[hc]AW[id]AW[jd]AW[kc]AB[jc]AB[kd]AB[ke]AW[nc]AW[qd]LB[jc:A]C[how can black use the aji of A?]AP[goproblems] (;B[lc];W[kb] (;B[mc];W[jb]LB[nd:A]C[good. black probably continues at ARIGHT]) (;B[lb];W[jb] (;B[md]C[not optimal. white's O17 stone remains effective]) (;B[me]C[not optimal. white's O17 stone remains effective])) (;B[md];W[lb]) (;B[jb];W[lb] (;B[mb];W[mc]) (;B[mc];W[mb]))) (;B[kb];W[lc]) (;B[jb];W[lc]) (;B[lb];W[lc]) (;B[ib];W[lc]) (;B[md];W[lb]) (;B[mc] (;W[lc]C[];B[md];W[mb] (;B[lb];W[kb];B[nb];W[la];B[oc]C[The ladder might not work but black can trade the corner for the outside. Play on for some variations.RIGHT];W[nd] (;B[ne];W[od];B[pd];W[oe];B[pe];W[of] (;B[pc]) (;B[pb])) (;B[pd];W[ne];B[qe];W[ob];B[pb];W[na];B[qc])) (;B[nb] (;W[ob];B[lb];W[na];B[kb]TR[jd]TR[id]TR[hc]C[This can be a good way of playing if the marked stones are weak.RIGHT]) (;W[lb]LB[jb:A]C[White has bad aji at A or Black can play M16 in sente.]))) (;W[kb] (;B[lc];W[jb]LB[nd:A]C[good. black probably continues at ARIGHT]) (;B[oc]))))