(;
AW [mf][mg][pg][mh][gi][ii][mi][mj][nj][pj][jk][mk][ok][pk][qk][rk][hl][jl][kl][ll][km][ln][on][mo][oo][mp][op][oq]
AB [jf][ig][kg][kh][ki][kj][kk][lk][nk][ml][nl][ol][pl][ql][jm][nm][qm][jn][kn][nn][qn][io][ko][po][ro][kp][lp][qp][lq][mq][qq]
SZ[19]
C[ black to make ko in isolation: nothing else matters. which way is the strongest?]
(;B[lm] ;W[mm] ;B[mn] ;W[lo] ;B[lm] C[RIGHT ko. i’ve been told that it’s stronger to force your opponent to make the first ko threat.])
(;B[mn] ;W[lo] ;B[lm] ;W[mm] C[ko. but here black has to come up with the first ko threat.])
(;B[lo] ;W[mn] C[oops! white connects.])
)