(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?HermanHiddema/ProblemEncoding]AP[GoWiki:2009]
DT[2009-04-28]
C[Diagram from http://senseis.xmp.net/?HermanHiddema/ProblemEncoding

]
PL[B]

AB[ca][fa][fb][dc][ec][fc][ad][bd][cd][dd]
AW[ba][db][eb][ac][bc][cc]


;
)
