(;AB[sj]AB[rj]AB[qj]AB[oi]AB[nj]AB[ol]AB[pn]AB[po]AW[si]AW[ri]AW[qi]AB[pi]AB[ok]AB[pm]AW[ph]AW[oh]AW[nh]AW[mi]AW[mj]AW[nk]AW[nl]AW[om]AB[ni]AW[qh]AW[rn]AB[pp]AB[rp]AB[sq]AB[rr]AW[on]AW[oo]AW[oq]AW[pr]AW[pq]AW[qr]AB[qq]AW[np]AW[rs]C[Black's group is just too big to die, but not strong enough to escape without injury...]AP[goproblems]
(;W[pj]
(;B[oj]C[Black stubbornly wants to keep all...]
(;W[pl];B[pk]
(;W[ql];B[qk]
(;W[rl];B[rm]
(;W[sk];B[qm])
(;W[qm]C[Black's greed has turned sour. White now can kill the top part of the group. (But beware of making it seki. T7 and R6 are miai for the kill.)RIGHT])
(;W[sm];B[qm])
(;W[sl];B[qm])
(;W[rk];B[qm]))
(;W[sl];B[rl])
(;W[sk];B[rl])
(;W[qm];B[rl])
(;W[rm];B[rl])
(;W[sm];B[rl]))
(;W[qk];B[ql])
(;W[rl];B[ql]))
(;W[pk];B[pl];W[qk];B[rk];W[ql];B[rl];W[qm];B[rm];W[qn];B[ro])
(;W[qk];B[pk])
(;W[ql];B[pl])
(;W[rk];B[qk]))
(;B[pk]C[Black should play here of course.];W[oj];B[qk]C[Sente reduction, best for both.RIGHT])
(;B[pl];W[oj];B[pk]C[Another sente reduction.RIGHT]))
(;W[pl];B[pk]
(;W[pj];B[ql];W[oj]C[You captured 4 stones in gote. This is both a point and a move worse than what you can get if you start at Q10, even if Black would play optimally there.])
(;W[ql];B[rl]
(;W[pj];B[qk];W[oj]C[You captured 4 stones in gote. This is both a point and a move worse than what you can get if you start at Q10, even if Black would play optimally there.])
(;W[qk];B[pj];W[qm];B[rk];W[ro];B[rm];W[qn];B[sr])
(;W[rk];B[qm])
(;W[oj];B[pj])
(;W[qm];B[qk];W[ro];B[rm];W[qn];B[sr]))
(;W[oj];B[pj];W[ql];B[rl])
(;W[qk];B[ql]))
(;W[ql];B[pl];W[pj];B[oj])
(;W[qk];B[pk])
(;W[pk];B[pl]
(;W[pj];B[oj];W[qk];B[rk];W[ql];B[rl];W[qm];B[rm];W[qn];B[ro])
(;W[qk];B[rk]
(;W[ql];B[rl]
(;W[pj];B[oj];W[qm];B[rm];W[qn];B[ro])
(;W[qm];B[rm]
(;W[qn];B[ro]
(;W[pj];B[oj])
(;W[qo];B[sn]))
(;W[pj];B[oj];W[qn];B[ro]))
(;W[rm];B[qm]))
(;W[pj];B[oj];W[ql];B[rl];W[qm];B[rm];W[qn];B[ro])
(;W[rl];B[ql]))
(;W[ql];B[qk]))
(;W[oj];B[pj])
(;W[sr];B[pj];W[rq];B[ro]C[Nice reduction, but not that big.]))