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

Abstract pattern (1)]
PL[W]

AB[gc][cd][dd]
AW[ic][lc][cf]
CR[cd][cf]
SQ[gc][ic]

;W[ef]C[W1]MN[1]
;B[fe]C[B2]MN[2]

;CR[cd][cf]
SQ[gc][ic]
)
