(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[http://senseis.xmp.net/?BeginnerExercise141/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise141/Solution

Failure]
PL[W]

AB[bk][dk][cl][el][dm][em][eo][fo][go][fp][bq][eq][dr][er]
AW[bl][am][cm][fm][gm][bn][hn][co][ho][cp][gp][ip][cq][dq][fq][gq][cr]
CR[eq][dr][er]

;W[do]C[W1]MN[1]
;B[en]C[B2]MN[2]
;W[ep]C[W3]MN[3]
;B[dp]C[B4]MN[4]

;CR[eq][dr][er]
)
