v0.2.1

[0.2.1] - 2026-03-02

Added

• First release with NNUE support in the shipped engine.
• Added a full Texel tuning toolchain, including a native tuner, dataset builders, large-run orchestration scripts, and parameter application helpers.
• Added gensfen, Lichess PGN extraction, and parallel self-play tooling for generating NNUE training data.
• Added incremental NNUE accumulator support in search to make embedded NNUE practical during play.

Changed

• Made embedded NNUE the default evaluator and shipped the first successful SYKNNUE2 network with updated training/export scripts.
• Retuned the classical evaluator with Texel-generated parameters, updated mobility tables, and cleanup across evaluation utilities.
• Expanded the README to describe engine features, tuning, and NNUE workflows in more operational detail.

Fixed

• Fixed search history handling so the current position is tracked correctly for repetition logic.
• Hardened dataset generation, Stockfish annotation retries, and cross-platform script behavior.
• Tightened option handling and parameter extraction in evaluation/tuning utilities.