chess-2
chess
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chess-2
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How does Depth actually work?
Yes, that is true. One can use NNs in either evaluation or heuristics or both - to my understanding, I haven't researched this that much. But yes what you say would fall under the heuristics category that mainly drives move ordering, better looking moves first. As the search is ultimately a depth first in basically every engine. If you are curious, allow me the shameless plug, you can check out my engine @ https://github.com/phaul/chess-2 I'm happy to answer you anything else about the engine, I love talking about this stuff :)
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chess review
If you decide to implement all rules ( en-passant / castle etc ) I recommend implementing a simple recursive function known by chess engines as perft. (https://www.chessprogramming.org/Perft#:\~:text=Perft%20is%20mostly%20for%20debugging,functions%20work%20correctly%20or%20not.) Running perft on different positions to a certain depth and then comparing your numbers against perft in stockfish etc is really helpful shaking bugs out.For my pet project engine I wrote some shell script that is supposed to debug and find positions where the engine has a bug in the move generator https://github.com/phaul/chess-2/blob/main/debug.sh
chess
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Java Fx Chess
If you're interested, here's my chess implementation including an engine (sans UI): https://github.com/marvk/chess
What are some alternatives?
chess
liground - A free, open-source and modern Chess Variant Analysis GUI for the 21st century
pixel-chess - A simple Chess engine written in JavaScript hooked up to a retro front-end for play. ♞
irwin - irwin - the protector of lichess from all chess players villainous
lichess-bot - A bridge between Lichess API and chess engines
Walleye - A chess engine written from scratch in Rust ♞
jfxchess - JFXChess - Chess Program
chess-pieces - Chess, Janggi, Xiangqi, Sittuyin pieces and boards
chesslib - chess library for legal move generation, FEN/PGN parsing and more
EubosChess - A Java chess engine. Uses UCI protocol. Playable on lichess.
jchessify - Java chess engine framework.
dummyette - yet another chess bot + Lichess API and chess library