(;GM[1]FF[4]SZ[19]
GN[Black's mistake?]
PC[http://senseis.xmp.net/?OneTwoThreeExample2]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OneTwoThreeExample2

Black's mistake?]
PL[W]

AB[cc][ic][dd][ed][hd][id][ee][fe][gf]
AW[ec][hc][fd][gd][ge][ff]

;W[he]C[W1]MN[1]
;B[ie]C[B2]MN[2]
;W[hf]C[W3]MN[3]
;B[gg]C[B4]MN[4]

;
)
