(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AW[rq][sp][qp][pp][pq][pr][or][oq][nr]AB[lq][mr][ns][nq][np][op][po][qo][ro][rp][rn][qq]C[Black to play.];B[rr]C[Correct]
(;W[sr]C[White's best response is to play here and then fight the ko.];B[sq])
(;W[qr]C[Incorrect for White.];B[sr]
(;W[sq];B[so];W[qq]
;B[os]C[White is dead.])
(;W[rs]
;B[so]C[White cannot catch the two stones.])))
