(;GM[1]FF[4]SZ[19]
GN[Thickness]
PC[http://senseis.xmp.net/?ThicknessExample9]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ThicknessExample9

Thickness]
PL[B]

AW[cd]

;B[ec]C[B1]MN[1]
;W[dc]C[W2]MN[2]
;B[ed]C[B3]MN[3]
;W[cf]C[W4]MN[4]
;B[hc]C[B5]MN[5]

;
)
