(;GM[1]FF[4]SZ[19]
GN[Though shape]
PC[http://senseis.xmp.net/?Cornershapes/Discussion]AP[GoWiki:2009]
DT[2011-07-10]
C[Diagram from http://senseis.xmp.net/?Cornershapes/Discussion

Though shape]
PL[B]

AB[ba][da][bb][cb][gb][ec][fc][gc][dd][ae][ce][de][bf][cg]
AW[ab][db][eb][bc][cc][dc][ad][bd][cd][be]
CR[gb][gc]
LB[fa:a]

;B[fb]C[B11]MN[11]
;W[ea]C[W12]MN[12]
;B[af]C[B13]MN[13]

;CR[gb][gc]
LB[fa:a]
)
