(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?WeakRectangularSixInTheCorner]AP[GoWiki:2009]
DT[2021-09-17]
C[Diagram from https://senseis.xmp.net/?WeakRectangularSixInTheCorner

Ko]
PL[W]

AB[ca][cb][cc][ad][bd]
AW[db][dc][cd][dd][be][cf]
CR[cd]

;W[ab]C[W1]MN[1]
;B[bb]C[B2]MN[2]
;W[ae]C[W3]MN[3]
;B[aa]C[B4]MN[4]

;CR[cd]
)
