(;GM[1]FF[4]SZ[19]
GN[Failure.]
PC[http://senseis.xmp.net/?BeginnerExercise203/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise203/Solution

Failure.]
PL[B]

AB[ca][ea][cb][eb][cd][ed][ce][ee][cf][df]
AW[ba][da][fa][bb][fb][bc][fc][bd][fd][be][fe][bf][ef][ff][cg][dg]
LB[dc:a][de:b]

;B[db]C[B1]MN[1]
;W[dd]C[W2]MN[2]
;B[cc]C[B3]MN[3]
;W[ec]C[W4]MN[4]

;LB[dc:a][de:b]
)
