(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AW[rs][qr][pr][pq][op][oo][po][qo][ro][so]AB[oq][or][os][pp][qp][rp][sp][sq][rr]C[Black to play]
(;B[qs]C[This throw-in is the correct way to win the fight cleanly.]
(;W[ps];B[qq])
(;W[sr];B[ss]))
(;B[ps]C[sf Black tries this then White can start a Ko.];W[sr])
(;B[sr];W[qq]
(;B[qs]
;W[ps]C[This is seki, assuming all the outside stones can live.])
(;B[ps]
;W[qs]C[Also seki without a wasted throw-in.]))
(;B[qq]
;W[sr]C[This is Ko, with White to find the first threat.])
(;B[ss]C[This is Ko, with Black to find the first threat.]))
