(;AB[rr]AB[sq]AB[sp]AB[qq]AB[pq]AB[pp]AB[po]AB[np]AB[mn]AB[ml]AB[ol]AB[pl]AB[qk]AB[rk]AB[pj]AB[ri]AB[rm]AB[sn]AW[on]AW[pn]AW[qn]AW[pm]AW[qo]AW[qp]AW[rp]AW[rq]AW[ql]AW[rl]AW[sl]AW[sm]C[White to live.]AP[goproblems] (;W[rn];B[so] (;W[sr];B[ss];W[ro];B[sr];W[qr]C[Nice !RIGHT]) (;W[ro];B[sr]C[]) (;W[rs];B[sr];W[qr];B[pr]C[]) (;W[qr];B[sr];W[pr];B[or];W[rs];B[ps];W[ro];B[qs]C[])) (;W[so];B[rn]C[Hey ! He was supposed to take your stone, no ? But black has some tricky moves ;-)] (;W[sr];B[sq];W[qr];B[ss] (;W[qs];B[pr];W[sp];B[ps];W[sr];B[rs]C[Not even ko =/ Look at the last variations down the tree for some additional explanations.]) (;W[sp];B[pr];W[sr];B[qs]C[])) (;W[qr];B[ss] (;W[qs];B[pr];W[sr];B[sq];W[sp];B[ps];W[sr];B[rs]C[Not even ko =/ Look at the last variations down the tree for some additional explanations.]) (;W[sr];B[sq] (;W[qs];B[pr];W[sp];B[ps];W[sr];B[rs]C[Not even ko =/ Look at the last variations down the tree for some additional explanations.]) (;W[sp];B[pr];W[sr];B[qs]C[])))) (;W[sr];B[rn]C[What is black doing ?! But, wait.. white has only one eye for the moment !] (;W[so];B[sq];W[qr];B[ss] (;W[qs];B[pr];W[sp];B[ps];W[sr];B[rs]C[Not even ko =/ Look at the last variations down the tree for some additional explanations.]) (;W[sp];B[pr];W[sr];B[qs]C[])) (;W[qr];B[ss] (;W[qs];B[pr];W[so];B[ps];W[sr];B[sq]C[Here, white will be forced sooner or later to fill at r7 : it is not seki. navigate to see how.];W[sp];B[rs]C[];W[sr];B[sk];W[qm];B[nn];W[oo];B[op];W[om];B[nm];W[no];B[mo];W[ro];B[rn];W[mj];B[sn];W[nj];B[sq];W[rm];B[rn];W[sr];B[ni];W[mi];B[sq];W[oi];B[sn]C[This is one possibility (for beginners who discover this 'false seki')]) (;W[so];B[pr];W[qs];B[ps];W[sr];B[sq]C[Here, white will be forced sooner or later to fill at r7 : it is not seki. navigate to see how.];W[sp];B[rs]C[];W[sr];B[sk];W[qm];B[nn];W[oo];B[op];W[om];B[nm];W[no];B[mo];W[ro];B[rn];W[mj];B[sn];W[nj];B[sq];W[rm];B[rn];W[sr];B[ni];W[mi];B[sq];W[oi];B[sn]C[This is one possibility (for beginners who discover this 'false seki')]))) (;W[qr] (;B[sr]C[CHOICE] (;W[so];B[rn];W[rs];B[ro] (;W[qm]C[RIGHT]) (;W[pr]C[alternative, longer path (thanks to MeleeNewB)NOTTHIS];B[or];W[qs];B[os];W[qm];B[ps];W[so];B[ss];W[qr])) (;W[rn];B[so];W[pr];B[or];W[rs];B[ps];W[ro];B[qs]C[]) (;W[rs];B[so];W[rn];B[pr]C[]) (;W[pr]C[NOTTHIS]) (;W[ps]C[NOTTHIS]) (;W[qs]C[NOTTHIS])) (;B[rn] (;W[so];B[ss] (;W[qs];B[pr];W[sr];B[sq]) (;W[sr];B[sq])) (;W[rs];B[qm];W[sr];B[sk];W[pr];B[or];W[so]C[Although S8 died, white gets the corner so this result is very good too.RIGHT]))))