(;GM[1]FF[4]SZ[19]
GN[Works.]
PC[http://senseis.xmp.net/?BeginnerExercise90/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise90/Solution

Works.]
PL[W]

AB[db][eb][fb][kb][cc][jc][cd][fd][gd][jd][ce][je][df][ef][ff][gf][hf][if]
AW[fa][gb][ib][dc][ec][fc][gc][hc][ic][dd][id][de][ee][fe][ge][he]

;W[ja]C[W3]MN[3]
;B[ha]C[B4]MN[4]
;W[ga]C[W5]MN[5]
;B[ia]C[B6]MN[6]
;W[jb]C[W7]MN[7]

;
)
