I very much love this idea of a roguelike with positioning being the main challenge, it's a good twist on the formula and using chess pieces makes it very understandable even with the minimal instructions. The wands are a great way of adding just a little additional strategy to deal with coming up against complicated formations difficult to move through. It feels pretty mechanically complete and is very engaging.
My one criticism is that when you die the board is immediately wiped, which makes it a bit difficult sometimes to understand what killed you and what mistake you made in order to learn from it. The log can help with this a bit by saying what type of piece did damage to you, but it doesn't help so much when there's multiple of the same kind of piece on the board. There might be some intentionalality to that with the conlang but I'm not sure. Still highly recommend it for a different kind of roguelike challenge.