(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.00]PB[Black to play and kill]AB[qr][qq][pq][op][oo][on][nm][ln][ko][jp][jq][jr]AW[pr][ps][oq][nr][np][no][lp]
(;B[mq]C[This placement results in a ko.];W[lq];B[mr];W[lr];B[ns];W[nq];B[qs];W[or];B[ls];W[ks];B[kr]
;W[ms]C[White captures first, so this is
not the best result for Black.])
(;B[or]MN[1]C[This is a better move – a throwin.];W[os];B[mq];W[lq];B[nq];W[mr]
;B[or]C[Again the result is a ko that
White must win, but now Black
takes the ko first which is better
than in the previous diagram.])
)
