(;GM[1]FF[4]SZ[19]
GN[better option?]
PC[http://senseis.xmp.net/?BeginnerExercise246/Solution]AP[GoWiki:2009]
DT[2016-05-07]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise246/Solution

better option?]
PL[B]

AB[bb][cb][gb][dc][gc][ic][ad][hd][he][cf][ef][gf][bg][cg][eg][fg][gg]
AW[ab][ac][bc][fc][cd][ed][gd][be][ce][de][ee][fe][bf][ff]
LB[eb:a]

;B[ec]C[B1]MN[1]
;W[fb]C[W2]MN[2]
;B[fa]C[B3]MN[3]
;W[ea]C[W4]MN[4]

;LB[eb:a]
)
