Changelog on Ironwood Chess

Analysis workspace and portable reports

Tue, 22 Sep 2026 00:00:00 -0500

Added

Full-game Stockfish analysis with configurable node budgets, pause, resume, stop, and progress controls.
Accuracy, average centipawn loss, move-quality classifications, an evaluation graph, and best-move guidance.
Interactive game and engine-prediction move lists with keyboard navigation and board highlighting.
Versioned Ironwood analysis JSON for lossless export and restoration of engine results.
Annotated PGN export and re-import of Ironwood evaluation, depth, node, best-move, and principal-variation annotations.
A printable analysis report with a complete annotated move list, quality-colored markers, evaluations, critical-position diagrams, played-move highlights, Stockfish best-move arrows, centipawn loss, and engine lines. Use the browser’s Save as PDF destination to create the PDF.

Improved

Imported games and their analysis survive refreshes and installed-app restarts.
Export commands distinguish between unavailable, running, paused, partial, and completed analysis.
The installed app now offers controlled updates without discarding games or unnecessarily downloading the large offline engine again.

All analysis still runs locally in the Stockfish Worker. Exporting a report does not upload the game or send positions to a report service.

Initial public build

Mon, 21 Sep 2026 00:00:00 -0500

Added

A complete playable chess board with legal move validation, castling, en passant, promotion, checkmate, and stalemate handled in Rust.
Stockfish 19 running in a dedicated Web Worker with its full NNUE network.
Multithreaded engine evaluation through SharedArrayBuffer, Atomics, and pthread workers.
Automatic game restoration after a refresh or a return from the landing page.
Engine download progress reporting and persistent browser caching.
A responsive two-dimensional interface designed to support future battle animations.
A public landing page, open-source notices, sitemap, robots policy, and complete favicon set.
An installable Progressive Web App with an automatically cached application shell and an explicit, progress-aware offline Stockfish download.

Infrastructure

Large, versioned engine assets are delivered through Cloudflare R2 and a same-origin Worker route.
Application WebAssembly is committed as a reviewed deployment artifact, avoiding unnecessary Rust compilation for content-only releases.
Cross-origin isolation headers keep multithreaded engine execution available without blocking the rendering thread.

This entry establishes the public changelog format. Future entries will focus on changes players can see or feel rather than reproducing private Git history.