where White was a little bit greedy.
What's the best White can do?
(;AB[oa]AB[pa]AB[qa]AB[ra]AB[rb]AB[rc]AB[re]AB[qf]AB[qg]AB[qh]AB[pf]AB[qd]AB[rd]AB[og]AB[ng]AB[nf]AB[mh]AB[lg]AB[kh]AB[li]AB[kb]AW[ib]AW[id]AW[kd]AW[na]AW[nb]AW[ob]AB[pb]AW[pc]AW[qc]AW[qb]AW[pd]AW[pe]AW[qe]AW[oe]AW[of]AW[od]AW[ld]AW[le]AW[lf]AW[kg]AW[jf]AW[jh]AW[ih]AW[oi]AB[md]AW[ne]AB[me]AW[mf]AB[mc]LB[mf:A]LB[mc:B]C[White has cut at A, Black B now threatens to kill the White stones on the right. Timing is essential to save them all.]AP[goproblems]
(;W[mb];B[lc]
(;W[lb];B[kc]
(;W[oc];B[ka]
(;W[ja];B[la]
(;W[jc];B[ma];W[jb]C[Seki.RIGHT])
(;W[jb]C[];B[jc];W[ic];B[jd];W[je]C[RIGHT]))
(;W[jc]
(;B[la]
(;W[jb]C[Seki.RIGHT])
(;W[ja]C[];B[ma];W[jb]C[Seki.RIGHT]))
(;B[ia];W[ha];B[ja];W[hb];B[la]C[Would be sente for White!]))
(;W[jb];B[jc]
(;W[ic]
(;B[la]
(;W[jd]C[Seki. Good, but you could have restricted Black a little bit tighter.RIGHT])
(;W[ja]C[Seki. Good, but you could have restricted Black a little bit tighter.RIGHT];B[jd];W[je]C[RIGHT]))
(;B[jd];W[la];B[je];W[ie]C[Black dies!RIGHT]))
(;W[jd];B[ic];W[hc];B[ja];W[hb];B[la]C[Seki, but Black has reduced White's territory somewhat more than necessary and there's H16 to worry about.])
(;W[ja];B[ic])
(;W[la];B[nc]))
(;W[la];B[nc])
(;W[nc];B[nd])
(;W[nd];B[nc])
(;W[jd];B[la])
(;W[ic];B[la])
(;W[ia];B[la])
(;W[je];B[la])
(;W[mg];B[la]))
(;W[nc];B[nd])
(;W[nd];B[nc])
(;W[jc];B[oc]
(;W[nc];B[nd])
(;W[ka];B[nd])
(;W[nd];B[nc])
(;W[la];B[ka])
(;W[jb];B[ka]))
(;W[jb];B[oc]
(;W[nc];B[nd])
(;W[nd];B[nc])
(;W[la];B[ka])
(;W[ka];B[nd]))
(;W[ka];B[oc]
(;W[nc];B[nd])
(;W[jb];B[nd]))
(;W[ja];B[oc];W[nc];B[nd])
(;W[la];B[oc];W[nc];B[nd])
(;W[jd];B[ka])
(;W[ic];B[ka])
(;W[ia];B[ka]))
(;W[kc];B[lb]
(;W[jb];B[oc]
(;W[nc];B[nd])
(;W[ka];B[nc])
(;W[nd];B[nc])
(;W[la];B[nc]))
(;W[nc];B[nd])
(;W[oc];B[nd])
(;W[nd];B[nc])
(;W[la];B[oc]
(;W[ka];B[nc])
(;W[nc];B[nd])
(;W[nd];B[nc])
(;W[ma];B[nc])
(;W[jb];B[nc]))
(;W[ka];B[oc]
(;W[la];B[nc])
(;W[nc];B[nd])
(;W[nd];B[nc])
(;W[jb];B[nc])
(;W[ma];B[nc])))
(;W[nc];B[nd])
(;W[oc];B[lb]
(;W[kc];B[nd])
(;W[jb];B[nc])
(;W[ka];B[nc])
(;W[la];B[nc]))
(;W[nd];B[nc])
(;W[jb];B[oc];W[nc];B[nd])
(;W[la];B[oc];W[nc];B[nd])
(;W[ka];B[oc];W[nc];B[nd]))
(;W[nc];B[nd])
(;W[oc];B[mb]
(;W[lb];B[lc]
(;W[kc];B[la])
(;W[la];B[ka])
(;W[ma];B[la]))
(;W[ma];B[lb])
(;W[lc];B[lb])
(;W[la];B[lb]))
(;W[nd];B[nc])
(;W[lb];B[oc]
(;W[nc];B[nd])
(;W[mb];B[nd])
(;W[lc];B[nd]))
(;W[lc];B[mb]
(;W[nc];B[lb])
(;W[oc];B[lb])
(;W[nd];B[lb])
(;W[lb];B[nd]
(;W[oc];B[la])
(;W[ma];B[oc])
(;W[la];B[oc])
(;W[nc];B[oc]))
(;W[ma];B[lb])
(;W[la];B[lb]))
(;W[la];B[lb])
(;W[ma];B[lb])
(;W[kc];B[lb]))