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

Overconcentration]
PL[W]

AB[dd]
AW[cf]
LB[ie:a]

;W[fc]C[W1]MN[1]
;B[hc]C[B2]MN[2]
;W[cc]C[W3]MN[3]
;B[dc]C[B4]MN[4]
;W[db]C[W5]MN[5]
;B[eb]C[B6]MN[6]
;W[cb]C[W7]MN[7]
;B[ec]C[B8]MN[8]
;W[cd]C[W9]MN[9]
;B[de]C[B10]MN[10]

;LB[ie:a]
)
