(;GM[1]FF[4]SZ[19]
GN[...make a ko.]
PC[http://senseis.xmp.net/?DoubleThreat/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DoubleThreat/Solution

...make a ko.]
PL[W]

AB[oc][kd][ld][nd][od][pd][qd][me][ne][cf][dg][lg][dh][di][qi][ri][dj][lj][mj][nj][oj][pj][qj][ck][jk][kk][pk][cl][el][ll][lm][mm][qm][rm][sm][bn][kn][mn][on][sn][bo][co][eo][fo][ho][no][oo][qo][ro][cp][dp][fp][np][op][pp][rp][bq][dq][gq][hq][mq][oq][rq][nr][sr]
AW[mb][ob][fc][mc][nc][pc][qc][dd][md][ce][qf][cg][ch][kh][lh][mh][oh][qh][ci][cj][jj][kj][rj][bk][lk][mk][nk][ok][rk][bl][kl][ml][ol][pl][ql][rl][bm][nm][pm][cn][dn][en][nn][pn][qn][rn][mo][po][gp][mp][qp][cq][fq][pq][qq][br][cr][dr][er][gr][or][pr][rr][fs]

;W[qs]C[W1]MN[1]
;B[os]C[B2]MN[2]
;W[ss]C[W3]MN[3]
;B[rs]C[B4]MN[4]
;W[so]C[W5]MN[5]
;B[sp]C[B6]MN[6]

;
)
