(;GM[1]FF[4]SZ[19]
GN[builds the outside]
PC[http://senseis.xmp.net/?Bulge/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Bulge/Discussion

builds the outside]
PL[W]

AB[cc][dc][fc]
AW[cd][dd][ed]
CR[ed]
LB[gb:a]

;W[ec]C[W1]MN[1]
;B[eb]C[B2]MN[2]
;W[db]C[W3]MN[3]
;B[cb]C[B4]MN[4]
;W[fb]C[W5]MN[5]
;B[da]C[B6]MN[6]
;W[gc]C[W7]MN[7]

;CR[ed]
LB[gb:a]
)
