Hi Graham
thanks for your answer. Sorry, my english is not good.
Yes, from the start position it is possible. But in a running game i can not open
the "set position" dialog. This is in LucasChess not possible.
I have found a workaround. I save the position. Start a new game and load that
position in the new game and i can play from this position.
But in LucasChess it is not possible to open the "set position" dialog in a running
game.
Can you ask lukasmonk it is possible to integrate this in LucasChess , please.

My other question was , how can i install LucasChess in Arch Linux
( ArcoLinux , a Arch distro ) . In MXLinux ( a debian distro ) all is good.
I found a "snap" version that run on ArcoLinux , but it is a old version and i will
not use snap.

thanks

Rudolf