The game was first made for Poki (it got rejected, sadly), so the very generous hint system was aimed at the more casual crowd. In the hands of a better chess player than me, there could have been a better system.
It is what it is, sorry :)
It is still nice, the hint system is indeed very generous. I don't get why it would be rejected for poki tho? maybe you could try your luck with crazygames. Its what my class plays on, and its a bit less known, so schools wont block it as fast.
I really liked playing this game, and ignoring the hint system is also just a possibility (thats what i did for the rest of the levels), so its not a game breaker at all.
Gl on the rest of your life journey, and I hope for your games, like this one, to get the attention and respect they deserve, I could not make this game, even if I tried. The gimmick is unique enough to not have a pile of other games doing the same thing, but not to unique to be annoying to learn. You have really made a good game. Don't think that someone else could have done it better, its your product, and you do what you think is best with it (and personally think you did very very good with this one).