(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[http://senseis.xmp.net/?UnderTheStonesProblem6/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?UnderTheStonesProblem6/Solution

Failure]
PL[B]

AB[ca][ea][cb][db][fb][ec][fc][fd][ge][ff][bg][cg][eg]
AW[aa][ba][bb][cc][dc][ad][cd][ed][be][ce][de][ee][af]
LB[bd:a]

;B[bc]C[B1]MN[1]
;W[ac]C[W2]MN[2]
;B[ab]C[B3]MN[3]
;W[bf]C[W4]MN[4]

;LB[bd:a]
)
