chess-2
StockNemo
chess-2 | StockNemo | |
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2 | 1 | |
5 | 64 | |
- | - | |
2.5 | 3.1 | |
about 1 year ago | about 1 year ago | |
C | C# | |
- | GNU Lesser General Public License v3.0 only |
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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
StockNemo
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Are there any chess engines with customizable evaluation functions?
https://github.com/TheBlackPlague/StockNemo, eval function is 76 lines of code. and simpleeval https://github.com/vondele/Stockfish/tree/simpleEval a modified version of stockfish which just uses piece value as an eval function (1, 3, 3, 5, 9)
What are some alternatives?
chess
Stockfish - A free and strong UCI chess engine
pixel-chess - A simple Chess engine written in JavaScript hooked up to a retro front-end for play. ♞
MinimalChessEngine - After watching The Queen's Gambit on Netflix I got interested in chess. I played a bit against computer programs and it made me curious about writing my own chess engine. This repository and a series of small videos I upload to Youtube after each milestone are documenting my progress.
Lynx - Chess Engine, written in C#
Stockfish - UCI chess engine
fastchess - Predicts the best chess move with 27.5% accuracy by a single matrix multiplication
chess - A chess library, chess engine, Lichess client, and UCI implementation written in Java
chess-book-study - A simple companion app for when you are reading chess pdfs.