Using RL is an interesting project and can result in very strong AI, but projects like AlphaZero take very large amount of computation.

I don't understand how your NPCs are different from chess pieces. Is it that there many types of them? Or perhaps that they have stats? Those seem like small obstac…

Tuzi_Cure said:

Let's say your player character has 10 HP.
I would multiply it by a factor of 10 for the display, so the player sees 100 HP. but as far as the code is concerned, it's still 10. 
If the play takes 1 damage now, the player's HP should be 90 HP, then 80, 70, and so forth until 0 HP. …