Open Source Java Chess Engines

Mediocre is a Java-based chess engine, implementing features like LMR, SEE, history and killer moves heuristics, transposition tables, internal iterative deepening, PVS search etc.

jose is a graphical Chess tool. >>> moved to https://peteschaefer.github.io/jose <<< You can store chess games in a database. You can view and edit games (including variations and comments). You can play against a plugged-in chess engine and use it for analysis. Features 3D board view.

Tool for chess teachers to create PDF files with chess diagrams in it. 1) Create a pgn file with chess diagrams (FEN notation) in it (e.g by using lichess) 2) Open the Fen2Pdf and select the folder containing the pgn(s) 3) Click start. Fen2Pdf detects the pgn files in it and creates a pdf file You can now print this file and hand the exercises over to your students Extra features: * Mirror the positions. This is handy if you want the same problems presented for the other color for educational purposes. You could present the same set of exercises in 2 different ways! * You can toggle the display of page numbers * The selected pgn folder is saved for next time * The title on the pages is the name of the pgn (without .pgn)

Chess Editor is a pure Java tool to create, edit and view chess games in the Portable Game Notation (PGN) format. The tool integrates with externally specified chess engine programs to provide analysis of board positions.

This library is an attempt to create a flexible chess engine using the Java programing language. The main diference than others chess engine's is that it is only a library, and it can be attached to any program, including a web application. If you are interested to contribute please contact me. Francisco Rafael Del Roio <francipvb@hotmail.com>.

This is UCI Chess Engine writen in Java. Since version 1.4 (inclusive) the project was moved to https://github.com/bagaturchess/Bagatur

Frittle is an open source amateur Java Chess Engine that supports the XBoard/WinBoard Chess Engine Communication Protocol (version 2).

A chess-engine based on Java.

This simple chess engine employs a minimax algorithm to calculate two moves ahead.

A chess application in order to play against computer or to play with another human. No network playing is planned (no FICS). This program uses the Carballo Chess Engine in order to check moves, and the Stockfish engine (that you must download on their website) in order to generate the computer moves.

Another open source java chess engine. The project is in a very early stage. Winboard compliance is partial. Does not support undo of moves or time controls. Right now it makes a move every 45 seconds. If you are a beginner-intermediate player you might find this a good sparring partner.I have tested this only with Arena3.0. I plan to make this stronger gradually. In the the end an array of ChessNovices with varying playing strenths should be available.

Extensive Java chess database libraries. Native game database, native position database, pgn database reader.

A Java Chess Engine supporting XBoard and OCI protocols. It is implemented using algorithms such as MinMax and AlphaBeta-Pruning searches.

Kenny ClassIQ (read Kenny Classic) is something like my dream project. It is a chess engine with pure object oriented programming with close-to-real-world representation of the game inside the program using OOPS. Initially I thought of doing a similar thing in C++, but after trying to develop my other chess engine Kenny in this route, I found out that it is a difficult task, and switched to using Java for the programming instead. To learn how to do it, I created a similar, many-times-lesser-in-complexity project KenTacToe. Having completed it successfully, I've gained the confidence to proceed with Kenny ClassIQ, named so because it is more class-oriented than Kenny, and because I want it to be intelligent. (A play with words landed me Kenny ClassIQ.) Also, I used this name so that people searching for my other chess engine Kenny can also find this more advanced chess engine (okay, yes, I wanted to name my chess engine Kenny, so).

You are given a chess graphical interface, with drag and drop functionnalities (or other interaction mode), board flipping, and some pieces/cells sets given. Then, you have some callbacks methods in order to validate moves from your chess engine and to update them to your chess engine.

An advanced GNU Java Chess Engine

A Simple chess gui and a chess engine

A Java-based chess engine with Swing, x-board and text-based console interfaces.

An easy to understand chess engine.

German (English below): DokChess ist eine voll funktionsfähige Schachengine. Sie dient als einfach zugängliches und zugleich attraktives Fallbeispiel für Architekturentwurf, -bewertung und -dokumentation. Der verständliche Aufbau lädt zum Experimentieren und zum Erweitern der Engine ein. Ziel ist nicht die höchstmögliche Spielstärke – dennoch gelingen Partien, die Gelegenheitsspielern Freude bereiten. DokChess ist eines der Fallbeispiele im Buch "Softwarearchitekturen dokumentieren und kommunizieren" von Stefan Zörner (Hanser 2012) English: DokChess is a Chess Engine implemented in Java. It is used as an example for software architecture documentation according to the arc42 template in a German book about documenting Software Architectures.

A chess engine to use with chess software or chess servers written completely in Java.

Java Program of a machine which plays chess: it recognizes the chessboard, the position, the move of the opponent, and asks an external Chess Engine to reply to the opponent move. it is connected to a real robot which has an arm to manipulate the pieces.

"Mentally Challenged" is an XBoard/WinBoard compatible chess engine written in Java.

This chess engine is the result of the project work 2013 at the University of Applied Sciences, study programme Applied Informatics. The target was to write an engine that is able to play chess with the official FIDE rules. At the moment, the engine chooses the first-found valid move instead of the best move. Other java classes should be fine. - shout-out to Mediocre Chess