(;GM[1]FF[4]SZ[19]
GN[Ko threats (2)]
PC[http://senseis.xmp.net/?TsumegoFromGames37/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TsumegoFromGames37/Solution

Ko threats (2)]
PL[B]

AB[ea][ha][fb][gb][hb][ib][jb][kb][pb][cc][dc][gc][ic][jc][mc][nc][oc][pc][cd][hd][id][kd][pd][ce][de][fe][ge][he][ke][cf][cg][dg][ch][jh][kh][mh][bi][bj][cj][dj][fj][gj][hj][kj][mj][dk][gk][ik][jk][pk][dl][hl][nl][pl]
AW[fa][ia][ja][ka][la][ma][eb][lb][mb][nb][ob][ec][fc][kc][lc][dd][fd][gd][ld][md][nd][od][ee][ie][pe][df][ef][ff][if][pf][eg][kg][lg][pg][dh][ih][oh][ci][di][fi][gi][ii][ni][pi][ij][jj][nj][pj][bk][kk][mk][nk][ok][el][fl][il][kl][ml]

;B[db]C[B1]MN[1]
;W[da]C[W2]MN[2]
;B[gg]C[B3]MN[3]
;W[hi]C[W4]MN[4]
;B[hg]C[B5]MN[5]
;W[ig]C[W6]MN[6]
;B[eh]C[B7]MN[7]
;W[fh]C[W8]MN[8]
;B[ei]C[B9]MN[9]
;W[fg]C[W10]MN[10]

;
)
