(;GM[1]FF[4]SZ[19]
GN[Basic ko (no outside liberties)]
PC[https://senseis.xmp.net/?CarpentersSquare]AP[GoWiki:2009]
DT[2023-01-29]
C[Diagram from https://senseis.xmp.net/?CarpentersSquare

Basic ko (no outside liberties)]
PL[W]

AB[db][dc][bd][cd][dd]
AW[eb][ec][ed][be][ce][de][ee]
LB[ea:a][ae:a]

;W[bb]C[W1]MN[1]
;B[ba]C[B2]MN[2]
;W[bc]C[W3]MN[3]
;B[ad]C[B4]MN[4]

;LB[ea:a][ae:a]
)
