(;GM[1]FF[4]SZ[9]
GN[The Ko Fight 4]
PC[http://senseis.xmp.net/?PracticalEndgameTest1/Solution4]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?PracticalEndgameTest1/Solution4

The Ko Fight 4]
PL[B]

AB[gb][hb][cc][ic][bd][cd][ed][gd][hd][id][be][ce][fe][he][af][cf][df][ef][ff][gf][hf][if][bg][fg][gg][ig][hh][ei][fi][gi][hi]
AW[ba][ha][ab][cb][eb][fb][ib][bc][dc][fc][gc][hc][ad][dd][fd][de][ee][ag][cg][dg][eg][ah][bh][dh][eh][fh][gh][ih][ai][ci][di]

;B[db]C[B1]MN[1]
;W[da]C[W2]MN[2]
;B[ia]C[B3]MN[3]
;W[bf]C[W4]MN[4]
;B[ae]C[B5]MN[5]
;B[ac]C[B7]MN[7]
;W[ga]C[W8]MN[8]
;B[bb]C[B9]MN[9]
;W[ca]C[W10]MN[10]

;
)
