It seems this is not the only bug.

When testing underpromotions for the plugin, I reached the following position:
5R2/8/5K1k/8/8/8/8/8 w - -

If you now enter the move Rf8-h8#, the display of the VIP just goes blank instead of showing a mate - you have to press e.g. [C/CB] to continue.

__________________
Meine Webseite: https://fhub.jimdofree.com/

Interesting.
Regarding the previously commented, all of us who have had a Novag VIP know that you should not press GO after entering the move. hap did it by accident, and I purposely tested it with the "physical" Novag VIP, and we noticed that this bug occurs. And I also think it is a bug, and not a user mistake, because the program should avoid this situation. Otherwise you can still play with illegal moves in the stored move train. It is absurd.

Best,
Gerardo

Hello,

Why you do not compare VIP and SVIP roms (disassembled of course) ?
It is probably the same code, only the library has exploded in size.

Cordialy.