(;AW[kq]AW[lp]AW[mq]AW[nq]AW[oq]AW[pq]AW[qq]AW[qp]AB[pp]AB[op]AB[np]AB[mp]AB[oo]AB[mo]AW[po]AW[no]AB[lo]AB[ln]AB[kn]AB[km]AB[ll]AB[ml]AB[mk]AB[nk]AB[ok]AB[pl]AB[pm]AB[ql]AB[rl]AW[on]AW[om]AW[ol]AW[nl]AW[mm]AW[mn]AW[oj]AW[pj]AW[pk]AW[qk]AW[rk]TR[lo]C[Black just played the marked stone. Find the best way to deal with this situation.]AP[goproblems]
(;W[pn];B[qn]
(;W[qo];B[ro]
(;W[rm]C[Well done. This is the only move that keeps Black unconditionally dead. Also Black O6 would just be gote, the marked stones are safe.RIGHT]MA[mn]MA[mm])
(;W[rn];B[rm]C[Ko.])
(;W[rp];B[rm]
(;W[so];B[sn]C[Ko]MA[sp]MA[sl])
(;W[sn];B[so])
(;W[sp];B[so])
(;W[sl];B[sn])
(;W[sm];B[sn]))
(;W[sm];B[rm]
(;W[sl];B[sn]
(;W[sk];B[rp])
(;W[rp];B[sk]))
(;W[sn];B[sl])
(;W[so];B[sp]
(;W[sn];B[sl])
(;W[sl];B[sn])
(;W[rn];B[sn])
(;W[rp];B[sn]
(;W[sq];B[sl])
(;W[sl];B[sk]))
(;W[sq];B[rp]))
(;W[rp];B[sn])
(;W[sp];B[sn]))
(;W[sl];B[rm]
(;W[rp];B[sn])
(;W[sm];B[sn]
(;W[sk];B[rp])
(;W[rp];B[sk]))
(;W[sn];B[sm]
(;W[rp];B[so])
(;W[so];B[rp])
(;W[sp];B[so]))
(;W[so];B[sn]MA[rn]C[Now S6 is a real eye.])
(;W[sp];B[sn]MA[rp]MA[so]))
(;W[sn];B[rm]
(;W[rn];B[so]C[Ko])
(;W[so];B[rp]C[]
(;W[rn];B[sp]C[Ko])
(;W[rq];B[sp])
(;W[sp];B[rq]
(;W[rn];B[sq]C[Ko])
(;W[sq];B[rr]
(;W[rn];B[sr]C[Ko])
(;W[sr];B[rn])
(;W[sl];B[sm])
(;W[sm];B[sl])
(;W[qr];B[sr]))
(;W[sl];B[sm])
(;W[rr];B[sq])
(;W[sm];B[sl]))
(;W[sl];B[sm])
(;W[sm];B[sl]))
(;W[sp];B[so])
(;W[sl];B[sm]
(;W[rp];B[so])
(;W[so];B[rp])
(;W[sp];B[so]))
(;W[sm];B[sl])
(;W[rp];B[so])
(;W[nn];B[so]))
(;W[sk];B[rm])
(;W[so];B[rm]
(;W[rp];B[sn]C[Ko]MA[sp]MA[sl])
(;W[sn];B[rp]C[]
(;W[rn];B[sp]C[Ko])
(;W[rq];B[sp])
(;W[sp];B[rq]
(;W[rn];B[sq]C[Ko])
(;W[sq];B[rr]
(;W[rn];B[sr]C[Ko])
(;W[sr];B[rn])
(;W[sl];B[sm])
(;W[sm];B[sl])
(;W[qr];B[sr]))
(;W[sl];B[sm])
(;W[rr];B[sq])
(;W[sm];B[sl]))
(;W[sl];B[sm])
(;W[sm];B[sl]))
(;W[sp];B[sn]
(;W[rp];B[sl]C[Ko])
(;W[sl];B[rp]))
(;W[sl];B[sn]MA[rn]C[Now S6 is a real eye.])
(;W[sm];B[sp]
(;W[sn];B[sl])
(;W[sl];B[sn])
(;W[rn];B[sn])
(;W[rp];B[sn]
(;W[sq];B[sl])
(;W[sl];B[sk]))
(;W[sq];B[rp]))
(;W[rn];B[sn]))
(;W[sp];B[rm]
(;W[sn];B[so])
(;W[sl];B[sn]MA[rp]MA[so])
(;W[rp];B[so]))
(;W[nn];B[rm]C[You saved a stone. Black saved a group.]))
(;W[ro];B[nn]C[]
(;W[nm];B[qo])
(;W[qo]TR[qn]TR[pm]TR[pl]TR[ql]TR[rl]C[Black's capture at O6 is sente; meaning White S5 was a wasted move. The marked stones would also be dead without it.])
(;W[rn];B[lm]
(;W[nm];B[qo])
(;W[qo];B[nm]))
(;W[rm];B[qo])
(;W[qm];B[lm]
(;W[nm];B[qo])
(;W[qo];B[nm])
(;W[rm];B[nm])
(;W[rn];B[nm])))
(;W[rn];B[nn]
(;W[qo]C[Black's capture at 06 is sente; White S6 becomes a wasted move, as the marked stones would also be dead without it.]TR[qn]TR[pm]TR[pl]TR[ql]TR[rl])
(;W[nm];B[qo])
(;W[ro];B[lm]
(;W[nm];B[qo])
(;W[qo];B[nm]))
(;W[qm];B[lm])
(;W[rm];B[qo])
(;W[sl];B[qo]))
(;W[nn];B[qo])
(;W[nm];B[qo])
(;W[rm];B[nn]
(;W[nm];B[qo])
(;W[qo]C[Black O6 becomes sente; meaning S7 is a wasted move, as the marked stones would also be dead without it.]TR[qn]TR[pm]TR[pl]TR[ql]TR[rl])
(;W[rn];B[qo])
(;W[qm];B[lm])
(;W[sl];B[lm])
(;W[ro];B[qo]))
(;W[qm];B[rm]
(;W[ro];B[nn]
(;W[qo]C[And so R7 becomes a wasted move, capturing tones that would also have been captured without it; meaning Black could capture O5 for free.])
(;W[rn];B[lm])
(;W[nm];B[qo])
(;W[lm];B[qo]))
(;W[qo];B[ro])
(;W[rn];B[ro])
(;W[nn];B[qo]))
(;W[sl];B[nn]
(;W[nm];B[qo])
(;W[qo]C[Black captures O5 for free, as White ends in gote. T8 is in fact a wasted move as Black would also be dead without it.])
(;W[rm];B[lm])))
(;W[qo];B[pn])
(;W[qn];B[pn])
(;W[nn];B[pn])
(;W[rm];B[pn])
(;W[sl];B[pn])
(;W[rn];B[pn])
(;W[qm];B[pn])
(;W[ko];B[pn]C[Good shape, but bad for the balance of territory...])
(;W[ro];B[pn])
(;W[nm];B[pn])
(;W[lm];B[pn])
(;W[jo];B[pn])
(;W[jp];B[pn])
(;W[kp];B[pn])
(;W[kl];B[pn])
(;W[nj];B[pn]))