(;GM[1]FF[4]SZ[19]
GN[At 'a' is hardest to disprove]
PC[http://senseis.xmp.net/?VeryArtificialProblem/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?VeryArtificialProblem/Attempts

At 'a' is hardest to disprove]
PL[W]

AB[dc][ce]
AW[aa][ba][ab][bb][ac][bc]

;W[be]C[W1]MN[1]
;B[bf]C[B2]MN[2]
;W[db]C[W3]MN[3]
;B[eb]C[B4]MN[4]
;W[cd]C[W5]MN[5]
;B[de]C[B6]MN[6]
;W[dd]C[W7]MN[7]
;B[ed]C[B8]MN[8]
;W[cc]C[W9]MN[9]

;
)
