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Gyatso 1.3.0 - new chess engine

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Gyatso - UCI chess engine
Author: Gyatso Neesham
Gyatso is UCI's new chess engine. Initial testing has already begun.

Gyatso 1.3.0 what's new?
Gyatso 1.3.0 is the latest version of a promising open-source chess engine written entirely in the Nim programming language. Released on March 30, 2026, by developer GyatsoYT, it represents a major milestone for the project thanks to the integration of NNUE (Efficiently Updatable Neural Network) evaluation.Quick Background and Version HistoryGyatso is a UCI-compatible engine that blends modern programming practices with classical chess algorithms. It aims for high performance while remaining relatively lightweight and easy to compile. Its strength has grown rapidly across versions.
The engine already has a live Lichess bot (@GyatsoBot) where you can test it in real time.

What’s New in 1.3.0The headline feature is NNUE evaluation, trained on self-play games generated by the previous hand-crafted evaluation (HCE). This brings the engine into the modern neural-network era while keeping the codebase clean and efficient. 
Other notable additions include:Late Move Pruning (LMP)
Various search and evaluation refinements (“and much more,” as the author put it)

The result is a big jump in playing strength while maintaining the engine’s signature speed and simplicity. We will start testing this engine's Chess Engines Diary soon.



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