(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?RetrogradeAnalysisProblem9/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RetrogradeAnalysisProblem9/Solution

]
PL[W]

AB[hg][ig][jg][kg][lg][gi][hi][li][mi][fj][kj][nj][gk][jk][mk][gl][hl][ll][ml][im][jm][km]
AW[ih][jh][kh][ii][ki][hj][jj][lj][hk][ik][lk]

;W[jl]C[W1]MN[1]

;
)
