(;GM[1]FF[4]SZ[19]
GN[The 'big bulge']
PC[http://senseis.xmp.net/?ShapeProblem4/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ShapeProblem4/Discussion

The 'big bulge']
PL[B]

AB[gc][dd][ce][ei][dj]
AW[ic][lc][cf][ef][di]

;B[fe]C[B1]MN[1]

;
)
