(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AW[sr][rr][rq][pq][oq][op][nq][or][ns]AB[nr][mr][lr][mq][mp][np][oo][pn][pp][qp][rp][sp][sq]C[Black to play and kill.]
(;B[qs]C[Incorrect.];W[rs]C[Black cannot remove the second eye.])
(;B[qr];W[qq]
(;B[rs];W[ps]
;B[qs]C[This is a seki in gote.])
(;B[ps];W[rs];B[os];W[qs];B[ms]
;W[pr]C[White lives.]))
(;B[ps]C[Correct.]
(;W[os];B[qr];W[qq]
;B[rs]C[White can only make one eye.];W[pr];B[qs];W[ss];B[qs])
(;W[qq]
(;B[os]C[Mistake.];W[qs])
(;B[rs]
(;W[qr]
;B[os]C[White can only make one eye.])
(;W[os];B[qr])))))
