Show HN: EvoChess – start with 8 pawns, evolve your army

EvoChess, a chess variant where players start with only pawns and a king and promote pieces through accumulated moves, has a playable version with a neural-net-based AI opponent. The developer, penkovsky, trained a stronger neural network for board evaluation and added a 'Fun' mode where the AI thinks while the player thinks, but this mode drains battery. The project is available on GitHub and a writeup is on penkovsky.com.

This chess variant's theme is evolution. One morning in early 2016 I woke up with an idea: what if chess were built around promotion? Eventually, this resulted in the following game: It plays like chess, but you start with only pawns and a king. Pawns can be promoted to bishops or knights, while those minor pieces can be promoted to rooks. Their promotion rights accumulate every three pawn moves, pawn promotion right; every three minor piece moves, minor piece to rook right . Rooks are transformed to a knight or a bishop on the rook's fifth move. Recently, I built a playable version. The AI opponent works on phone with no internet. The search engine uses a lightweight neural net. The engine was first weak and my friends complained about it. So I have spent quite some time to train a better NN for the board evaluation. Fixed some bugs in search. And I have even designed a "Fun" mode where the AI opponent is thinking while you are thinking. WARNING: "Fun" mode is ruthlessly draining the battery Now, when the engine became stronger, my friends complain it is hard to beat. Is the Fun mode less fun now? Should I allow the engine to lose? More in the writeup: https://penkovsky.com/post/evochess/ https://penkovsky.com/post/evochess/ Code: https://github.com/penkovsky/evochess/ https://github.com/penkovsky/evochess/ Comments URL: https://news.ycombinator.com/item?id=49146818 https://news.ycombinator.com/item?id=49146818 Points: 2 Comments: 0