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

Var 1.a]
PL[B]

AB[ca][da][db][bc][dc][cd][dd]
AW[ba][bb][cb][eb][gb][ec][ed][be][ce][de][ee][bg]
LB[cc:a]

;B[ab]C[B1]MN[1]
;W[bd]C[W2]MN[2]

;LB[cc:a]
)
