(;GM[1]FF[4]SZ[19]
GN[Variation.]
PC[http://senseis.xmp.net/?BeginnerExercise231/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise231/Solution

Variation.]
PL[B]

AB[ab][bb][cb][db][bc][dc][ec][fc][gc][bd][gd][be][fe][ge][ff][dg][eg][fg][gg]
AW[ba][ca][da][eb][fb][gb][ac][cc][hc][ad][cd][dd][hd][ae][ee][he][af][bf][cf][ef][gf][hf][cg][hg][ch][dh][eh][fh][gh]

;B[ed]C[B1]MN[1]
;W[ib]C[W2]MN[2]
;B[ce]C[B3]MN[3]

;
)
