Arasan is a chess program for Windows and Linux. It has both a native user interface (for Windows only) and a console-based chess engine for use with Winboard or xboard.

Arasan also works with Arena, another free chess interface, and with UCI-compatible programs like Shredder. It includes an opening "book" with over 400,000 moves.

Since version 14.0, the Arasan chess engine is licensed under the MIT License.

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