This is really neat! And fun! I love the survival take on this. I also really dig that attempting to do an illegal move blocks you from ever using that square. It's a great way to enforce for the player that they need to be very deliberate in their moves.
Knight Quest is an experiment on board+computer games.
You control a chess knight and need to eat pawns in order to survive. You can only use legal knight moves, else the board tile will be destroyed and out of bounds for the rest of the game. A hunger display shows you how much time you have left.
The game idea, code & music are mine.