(;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]))