(;GM[1]FF[4]SZ[19]
GN[White cannot lean]
PC[http://senseis.xmp.net/?ShapeProblem4/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ShapeProblem4/Discussion

White cannot lean]
PL[B]

AB[gc][dd][ce][ei][dj]
AW[ic][lc][cf][ef][di]
LB[ed:a]

;B[fe]C[B1]MN[1]
;W[de]C[W2]MN[2]
;B[cd]C[B3]MN[3]

;LB[ed:a]
)
