(;GM[1]FF[4]SZ[19]
GN[Keep placement group killable shape]
PC[https://senseis.xmp.net/?PlacementPrinciples]AP[GoWiki:2009]
DT[2023-02-27]
C[Diagram from https://senseis.xmp.net/?PlacementPrinciples

Keep placement group killable shape]
PL[B]

AB[aa][ba][ca][ab][fb][dc][ec][fc][cd][dd][be][ce]
AW[da][cb][db][bc][cc][ad][bd]
CR[ac]
SQ[bb]


;CR[ac]
SQ[bb]
)
