Problem	12350
Created	2009-01-29
Name	Smeghead's third problem
Source	Some random KGS game (I forget which)
Rating

Difficulty	4 kyu
Average Solve Time	45 secs
User Attempts	382 / 1073
Solve Ratio Rating	5 kyu
	rating history

Play the endgame for black that is most profitable.

(;AB[rn]AB[rm]AB[qm]AB[ql]AB[rk]AB[rj]AW[rl]AW[qk]AW[pk]AW[pl]AW[pm]AW[qn]AW[ro]AW[po]AB[or]AB[nr]AB[mr]AB[lq]AB[kq]AW[lp]AW[mp]AW[mq]AW[nq]AW[oq]AW[pr]AW[kp]C[What is black's best endgame?]AB[qj]AB[kr]AW[pj]AW[jp]AW[ll]AB[jq]AB[qi]AW[pi]AP[goproblems] (;B[qp];W[qo] (;B[qr] (;W[ps] (;B[pq]C[Correct! Navigate solution to see what white's response should have been.RIGHT]) (;B[qq];W[pq] (;B[sp];W[so]C[Black is dead.]) (;B[rp];W[sn]C[Black is dead in gote.]))) (;W[qq]C[Either of these variations is better for white.];B[ps];W[pq] (;B[rr]C[]) (;B[rq];W[rr];B[rs]C[Ko.])) (;W[pq]C[Either of these variations is better for white.];B[ps];W[qq] (;B[rr]C[]) (;B[rq];W[rr];B[rs]C[Ko.]))) (;B[pq];W[qr] (;B[rp];W[sn]) (;B[rq];W[qq])) (;B[rp];W[sn];B[pq];W[qr] (;B[rr];W[qq];B[pp];W[rq]) (;B[qq];W[rr]) (;B[rq];W[rr]) (;B[sq]C[Some interesting variations here, but they are all worse than the correct line for black.]))) (;B[qr] (;W[ps] (;B[qp];W[qo] (;B[pq]C[Correct! Navigate solution to see what white's response should have been.RIGHT]) (;B[qq];W[pq])) (;B[pq];W[qq] (;B[qp];W[pp]) (;B[qs];W[pp]) (;B[pp];W[qp])) (;B[qq];W[pq];B[qp];W[qo] (;B[sp];W[so]C[Black is dead.]) (;B[rp];W[sn]C[Black is dead in gote.]))) (;W[qq]C[Either of these variations is better for white.];B[ps];W[pq] (;B[rr]) (;B[rq];W[rr];B[rs]C[Ko.])) (;W[pq]C[Either of these variations is better for white.];B[ps];W[qq] (;B[rr]) (;B[rq];W[rr];B[rs]C[Ko.]))) (;B[qq];W[pq];B[qp];W[qo];B[qr];W[ps] (;B[sp];W[so]C[Black is dead.]) (;B[rp];W[sn]C[Black is dead in gote.])) (;B[rp];W[sn] (;B[sl];W[pq];B[qp];W[qo]C[Black is dead.]) (;B[qr];W[ps] (;B[qq];W[pq]C[Black is dead.]) (;B[qp];W[pq];B[qo];W[sm]))) (;B[pq];W[qr] (;B[rp];W[sn] (;B[sl];W[qp]) (;B[qp];W[rq]) (;B[qq];W[rr]C[White wins the semeai.])) (;B[qp];W[qo] (;B[rp];W[sn] (;B[rr];W[qq];B[pp];W[rq]) (;B[qq];W[rr]) (;B[rq];W[rr]) (;B[sq]C[Some interesting variations here, but they are all worse than the correct line for black.])) (;B[rq];W[qq]))) (;B[ps];W[qr]C[Black can do better.]) (;B[so];W[sp] (;B[sn];W[sm]C[Oops!]) (;B[rp];W[sn]) (;B[sl];W[sn])))