(;GM[1]FF[4]SZ[19]
GN[Failure at 1]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem69/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem69/Solution

Failure at 1]
PL[B]

AB[mb][pb][lc][qc][rc][ld][md][nd][od][pd]
AW[jb][lb][nb][kc][mc][nc][oc][rd][ke][qe][mf][of][qf]
CR[nb]
LB[oa:a][ob:b]

;B[rb]C[B1]MN[1]
;W[qa]C[W2]MN[2]
;B[ra]C[B3]MN[3]
;W[pa]C[W4]MN[4]

;CR[nb]
LB[oa:a][ob:b]
)
