(;SZ[19]AW[ro]AW[qp]AW[qq]AW[pr]AW[rs]AB[qk]AB[qn]AB[rn]AB[qo]AB[pp]AB[nq]AB[pq]AB[or]C[Black to play.http://gogameguru.com/]GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]KM[0.00]SO[http://gogameguru.com/] (;B[sr];W[rq] (;B[ps] (;W[sn] (;B[sp] (;W[so] (;B[sm];W[rp] (;B[qr];W[rr];B[sq]C[RIGHT];W[rm];B[qm];W[rl] (;B[ql];W[rk];B[rj]C[RIGHT]) (;B[rk]C[RIGHT])) (;B[sq];W[qr]C[It's a seki, so white's alive.])) (;B[qr]C[RIGHT];W[rr] (;B[sm];W[rp];B[sq];W[rm];B[qm];W[rl] (;B[ql];W[rk];B[rj]C[RIGHT]) (;B[rk]C[RIGHT])) (;B[sq];W[rm];B[qm];W[rl];B[rk]LB[sm:A]LB[rp:B]C[. If black had exchanged A for B earlier, it would be slightly better now, but that's a minor detail.RIGHT])) (;B[sq]C[];W[qr] (;B[rp]C[RIGHT]) (;B[sm];W[rp]))) (;W[rp];B[so];W[sq];B[so]C[RIGHT])) (;B[sm];W[sp]C[White can cause trouble some trouble with a ko like this. Try to avoid fighting ko.]) (;B[rl];W[sq]) (;B[rm];W[sq]) (;B[qr];W[rr];B[sp]C[RIGHT];W[so] (;B[sm];W[rp];B[sq];W[rm];B[qm];W[rl] (;B[ql];W[rk];B[rj]C[RIGHT]) (;B[rk]C[RIGHT])) (;B[sq];W[rm];B[qm];W[rl];B[rk]LB[sm:A]LB[rp:B]C[. If black had exchanged A for B earlier, it would be slightly better now, but that's a minor detail.RIGHT]))) (;W[sp];B[sn] (;W[rr];B[so]C[RIGHT]) (;W[sq];B[so]C[RIGHT]) (;W[so];B[sq]C[RIGHT])) (;W[so];B[sq];W[rr];B[sn]C[RIGHT])) (;B[so];W[sp]LB[sn:A]LB[ps:B]C[It's a ko, because A and B are miai for white. Black can do better than this.]) (;B[sp];W[sq] (;B[so];W[ps]) (;B[ps];W[so]) (;B[qr];W[rr] (;B[ps];W[so]) (;B[so];W[ps])))) (;B[ps];W[so] (;B[rr];W[qr];B[rq];W[rp] (;B[sq];W[sr]C[It's a ko, but black can do better.]) (;B[sr];W[sq]C[It's a ko, but black can do better.])) (;B[sr];W[sq] (;B[rq];W[rp]C[It's a ko, but black can do better.]) (;B[rr];W[qr];B[rq];W[rp]C[It's a ko, but black can do better.])) (;B[sq];W[sr] (;B[rr];W[qr]C[It's a ko, but black can do better.]) (;B[qr];W[rr]) (;B[rq];W[rr];B[qr];W[rp])) (;B[sn];W[rq] (;B[sr];W[sq]) (;B[sq];W[sr])) (;B[qr];W[rr] (;B[rq];W[rp];B[sq];W[sr]) (;B[rp];W[rq]))) (;B[so];W[rq] (;B[ps];W[sp]LB[sn:B]LB[sr:A]C[It's a ko, A and B are miai for white. Black can do better.]) (;B[rp];W[sr] (;B[ps];W[qr]) (;B[qr];W[ps])) (;B[sr];W[sp]LB[sn:B]LB[ps:A]C[It's a ko, A and B are miai for white. Black can do better.])) (;B[rp];W[rq] (;B[so];W[sr] (;B[ps];W[qr]) (;B[qr];W[ps])) (;B[ps];W[sp])) (;B[qr];W[rr] (;B[ps];W[rp];B[sq];W[sr];B[so];W[rq]) (;B[rp];W[rq] (;B[so];W[ps]) (;B[ps];W[sp])) (;B[rq];W[rp];B[sq];W[qs];B[so];W[sr])) (;B[sq];W[sp];B[ps];W[sr];B[rr];W[qr];B[ss];W[qs]C[It's a ko. Black can do better.]) (;B[sp];W[rq] (;B[sr];W[sq] (;B[ps];W[so]) (;B[qr];W[rr];B[ps];W[so]) (;B[so];W[ps])) (;B[ps];W[so];B[sr];W[sq])) (;B[rq];W[rp];B[rr];W[qr];B[sr];W[ps];B[sp];W[so]C[Black has a two step ko, but this isn't a satisfactory result.]) (;B[rr];W[qr];B[sr];W[rq];B[so];W[sp]LB[sn:A]LB[ps:B]C[It's a ko. A and B are miai for white, but black can do better.]))