I have no problem with using 'unmoved', but do you have a short alternative for 'virginity' used further down in the legend?
Here is your text:
Click on piece to toggle virginity on/off
English does not have a single word noun for what you mean. I would suggest "moved status" or "unmoved status" if you want a noun, or you could rewrite it to say "Click on piece to toggle whether it has moved."
Here is your text:
English does not have a single word noun for what you mean. I would suggest "moved status" or "unmoved status" if you want a noun, or you could rewrite it to say "Click on piece to toggle whether it has moved."