It is now running but i have problems to input moves or change levels.
I can move the cursor e.g. and press enter. Then from square is set.
But i cannot set „to square“ and press enter.

Does it have only cursor movement or can i enter moves in notation ?
And how to change levels ?

I think i have it now. I must press shift-enter to get the „to square“ set.

Ok. Is level when the splash screen comes pressing a number 1-4 ??
And default is A ??

You must help me a little with operation of the thing.
I found no german manual in the internet so far.

Ok adrian gives tipps but they do not work on my system.

But maybe c1 to c1 enter for level C is accurate.

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