(;GM[1]FF[4]SZ[9]
GN[Answering the ko threat]
PC[http://www.go4go.net/]
AP[GoWiki:2009]
DT[2016-10-22]
C[Diagram from http://www.go4go.net/

Answering the ko threat]
PL[B]

AB[ba][ea][fa][ab][eb][fb][gb][cc][dc][ec][cd][ae][be][ce][de][ge][cf][df][ef][gf][ag][bg][cg][fg][gg][ch][fh][gh][ci][fi][gi]
AW[ca][da][ga][ha][bb][cb][db][hb][bc][fc][gc][hc][ad][bd][dd][ed][fd][gd][hd][id][ee][fe][he][ff][hf][dg][eg][hg][ig][dh][hh][di][ei][hi]

;B[eh]C[B1]MN[1]
;W[aa]C[W2]MN[2]
;B[bh]C[B3]MN[3]
;W[ac]C[W4]MN[4]

;
)
