v2.0.2

Highlights

• New engine: Lynx (MIT, ~3350 ELO) — integrated as a native engine and, via AOT-compiled WebAssembly, as a browser-playable engine (2-3x faster than a straight interpreter build). Runs on the main thread with a Module Worker, with the UI now showing its version and git commit hash.
• Stockfish on iOS via WebKit — downloaded at runtime rather than compiled in, so the shipped app binary stays GPL-free while still offering Stockfish-strength play on iOS.
• New engines page groups Built-in, Maia3, Lc0, Frozenight, Lynx, and Stockfish, each with ELO range and license, on the About screen.
• CLI and REST API server for driving the engines outside the app.

Gameplay & training

• Chess960 and other chess variants, selectable from Settings.
• Board themes and a solid-black-pieces toggle.
• Custom time controls and a Puzzle Rush mode.
• Coordinate Trainer and Opening Explorer (with web tablebase lookups).
• Blindfold mode and endgame drills.
• Pawn promotion now uses a proper dialog with a Unicode piece picker instead of always promoting to queen.

UI

• The overflow menu (⋮ in the game screen's app bar) was reorganized from a long flat list into grouped submenus: Game, Import / Export, Board Tools, Learn, Progress, plus top-level New Game / Settings / About.
• The About screen's version number now reads live from pubspec.yaml via package_info_plus instead of a hardcoded string that had drifted out of sync with the actual app version.
• Full localization (English + German) across every screen, with a working language toggle that now actually takes effect and persists the saved value.

Fixes

• Repaired the full test suite — 274/274 tests passing again.
• Engine now reliably starts thinking when it becomes ready on its own turn (previously could stall).
• Offer-draw logic fixed: the engine's accept/decline decision was evaluating the position from the wrong side's perspective.
• Web startup slowness fixed by removing a conflicting service worker and deferring the Maia3 bundle load.
• A string of Lynx-WASM stability fixes: reduced memory footprint for macOS browsers, corrected heap sizing, right-sized the hash table for WASM, skipped an unnecessary warmup pass, fixed a Convert.ToUInt64 overflow, and capped search depth to keep the UI responsive.
• Fixed the favicon showing the default Flutter icon instead of CrispChess's.
• Deploy workflow now has a fallback path; fixed a hint-request hang on web.

CI / Release

• Release workflow now also builds an unsigned iOS IPA.

Full Changelog: v2.0.0...v2.0.2

v2.0.1

Full Changelog: v2.0.0...v2.0.1

v2.0.0

Full Changelog: https://github.com/CrispStrobe/CrispChess/commits/v2.0.0