Catto: A TypeScript repository from nguyenphuminh

The Catto Chess Engine

Dependencies

Node.js & npm

Setup

Clone the repository to your machine.
Go to ./Catto/, install the packages:

npm install

Compile Catto:

npx tsc

Fire up Catto!

node .

Build into executable

In your console, type:

npm run build

Configure

There are several configurations for Catto that you can change in catto.config.js if you want:

module.exports = {
    // Search depth
    searchDepth: 5,
    // Set to true to turn on debug mode, will log out useful info
    debug: true,
    // If you disable stable mode, features that are in-dev and might cause issues will be turned on
    stable: true,
    // Leave true if you want UCI enabled, otherwise it will ask for a FEN string and log out the best position
    uci: true,
    // The starting position represented as a FEN string
    fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
    // Current version to show in UCI
    version: "v0.4.2",
    // Late move reduction config
    lmrFullDepth: 4, // Number of moves to be searched in full depth
    lmrMaxReduction: 3 // Only apply LMR above this depth
}

What do we currently have?

The engine

Negamax search algorithm with Alpha-Beta pruning.
Move ordering:
- MVV-LVA heuristic.
- Killer heuristic.
- History heuristic.
- Countermove heuristic.
Transposition table (enabled without Zobrist hashing).
Null-move pruning.
Late move reductions.
Search extensions:
- Check extensions.
- One reply extensions.
Quiescence search.
Evalution:
- PeSTO evaluation.
- Pawn structure.
Checkmate and draw detection.
UCI.

Todos

See todos for Catto here.

This looks familiar...

This used to be the Meow chess engine but I have decided to rebuilt it from the ground up because the old codebase is too messy and I lost track of what I was doing. Catto is written in Typescript and is designed to be more modular.

Copyrights

This project is licensed under the GPL-3.0 License.

nguyenphuminh/Catto