(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]C[Black to play.]AB[pq][pr][os][nr][ns][nq][np][oo][po][qo][ro][so][nn]AW[rr][qq][qp][rp][sp][pp][op][oq][or];B[rs]C[Correct.];W[qs]C[This is White's strongest reply.];B[ps]
(;W[qr]
;B[sr]C[White will have to start this ko and it is an approach-move ko for Black, as Black has to play above 5 rather than connecting.];W[ss];B[pj];W[qj];B[rs];W[pk];B[sq]
;W[ss]C[Now it is a direct ko.])
(;W[ss]C[White should not play this way as it makes a direct ko for Black.];B[qr];W[sq]
;B[rs]C[If Black gets to connect the ko White is dead. White needs to win the ko and connect at 7 to live.]))
