(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?BeginnerExercise337/Solution]AP[GoWiki:2009]
DT[2016-05-14]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise337/Solution

Solution]
PL[W]

AB[ln][mn][on][lo][no][kp][np][op][oq][kr][pr]
AW[qm][mo][po][mp][pp][mq][nq][qq][mr][qr]

;W[or]C[W1]MN[1]
;B[os]C[B2]MN[2]
;W[ns]C[W3]MN[3]

;
)
