(;GM[1]FF[4]SZ[19]
GN[Irrelevant variation]
PC[http://senseis.xmp.net/?BeginnerExercise171/Solution]AP[GoWiki:2009]
DT[2012-10-30]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise171/Solution

Irrelevant variation]
PL[B]

AB[bb][cb][hb][ac][cc][dc][gc][hc][bd][ce][fe][he][df][ff][fg][hg][eh]
AW[db][fb][gb][ec][cd][dd][ed][be][ef][cg][dg][gh][di][ei][fi][cj]
CR[be][df]
LB[de:b][eg:a]

;B[bf]C[B1]MN[1]
;W[cf]C[W2]MN[2]
;B[ae]C[B3]MN[3]
;W[ee]C[W4]MN[4]

;CR[be][df]
LB[de:b][eg:a]
)
