Wow that was an extreme mind bender for me. I shamefully admit that I was only able to complete the first and last puzzle without at least the first few hints (great hint system by the way, very helpful while still not giving away the whole solution). Very strong concept and execution; really loving all the uses for chess pieces people are coming up with. The only criticism I had was a small QOL one: It didn't seem like there was a reason for any of the pieces to have initial numbers. I would rather they all started at 0 so I could just place them on the first letter where I wanted them to start instead of having to place them on the board first, and THEN move them into position every time. There was also a little frustration with how slowly the board would reset. Great work!