These chess problems require you to understand the rules of chess.
Expected difficulty Medium • Comment/E-mail if you want a solution to be published
Stipulations Color the pieces so that there exists a game where this position is illegal due to FIDE Chess Law 5.2b (also known as Dead Reckoning), but legal otherwise.
Made from phone, so it’s hard to add comments, but it’s basically a really stupid problem. I might put the solution soon. And I’m expecting a cook here, that there exists other solutions I didn’t consider or something. But if there’s none then, well, good.