(;GM[1]FF[4]SZ[19]
GN[Extend]
PC[http://senseis.xmp.net/?NonJosekiExercise1/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?NonJosekiExercise1/Solution

Extend]
PL[B]

AB[fc][ed]
AW[ec][cd][fd]

;B[dc]C[B1]MN[1]
;W[dd]C[W2]MN[2]
;B[ee]C[B3]MN[3]

;
)
