(;GM[1]FF[4]SZ[19]
GN[Failure at 3]
PC[http://senseis.xmp.net/?KyuExercise10/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise10/Solution

Failure at 3]
PL[B]

AB[co][do][eo][fo][go][ho][bp][hp][bq][iq][br][fr][hr][ir][ds][es]
AW[cp][dp][ep][gp][cq][gq][hq][cr][gr][cs][fs][gs]

;B[dr]C[B1]MN[1]
;W[eq]C[W2]MN[2]
;B[er]C[B3]MN[3]
;W[fp]C[W4]MN[4]

;
)
