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

Comparison]
PL[B]

AB[gc][jc]
AW[lc][hd]
SQ[lc]

;B[hc]C[B1]MN[1]
;W[jd]C[W2]MN[2]
;B[kd]C[B3]MN[3]
;W[kc]C[W4]MN[4]
;B[id]C[B5]MN[5]
;W[je]C[W6]MN[6]

;SQ[lc]
)
