(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?RetrogradeAnalysisProblem4]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RetrogradeAnalysisProblem4

]
PL[B]

AB[aa][da][ea][eb][cc][dc][ec][ad][bd][cd]
AW[ca][bb][cb][db][gb][ac][bc][fc][ed][fd][ae][be][ce][de]
CR[ha][hb][hc][hd][he][af][bf][cf][df][ef][ff][gf][hf]


;CR[ha][hb][hc][hd][he][af][bf][cf][df][ef][ff][gf][hf]
)
