In article , "DFG"
wrote:

100 ducats will cost you US$11.90, or 10Euros. Here is the link at
XhessBase if you wish to purchase them

oops, if this is right, then I misread the instructions on Chessbase on
how to buy ducats.

OK, a factor of 8 less expensive makes more sense. I will have to look at
these lessons again; a half-hour lesson for a couple of bucks is beginning
to get close to my threshold.

Henri