(;GM[1]FF[4]SZ[19]
GN[Ko fight - White mistake]
PC[http://senseis.xmp.net/?SecondaryKoThreat]AP[GoWiki:2009]
DT[2011-12-23]
C[Diagram from http://senseis.xmp.net/?SecondaryKoThreat

Ko fight - White mistake]
PL[W]

AB[aa][ba][da][ea][ja][ka][la][oa][ra][ab][cb][eb][fb][gb][hb][ob][gc][oc][pc][qc][rc][sc][ed][fd][gd][hd][id][ie][je][ke][ef][ff][gf][hf][if][kf][jg][kg]
AW[ia][bb][db][ib][jb][kb][lb][mb][nb][bc][cc][dc][fc][ic][kc][lc][nc][ad][bd][dd][jd][kd][ld][md][nd][be][ce][de][fe][ge][af][bf]
CR[cb]

;W[ca]C[W1]MN[1]
;B[na]C[B2]MN[2]
;W[ma]C[W3]MN[3]
;W[ee]C[W5]MN[5]
;W[ec]C[W7]MN[7]
;B[ha]C[B8]MN[8]

;CR[cb]
)
