(;GM[1]FF[4]SZ[19]
GN[corner]
PC[https://senseis.xmp.net/?TwoSquares]AP[GoWiki:2009]
DT[2023-12-15]
C[Diagram from https://senseis.xmp.net/?TwoSquares

corner]
PL[B]

AB[bb][db][cc][bd]
AW[dc][ec][fc][cd][be][ce]

;B[ae]C[B1]MN[1]
;W[af]C[W2]MN[2]
;B[ad]C[B3]MN[3]
;W[bg]C[W4]MN[4]

;
)
