ChessSim releases

September 26, 2026

ChessSim now leads with the story while keeping serious chess analysis one tap away.

• ✓Story-first homepage with featured and latest match narratives
• ✓Story and Analysis reading modes that keep the same board position
• ✓Clear match provenance, key moments and generation details
• ✓Search-ready match pages, FAQ and structured data
• ✓Improved mobile layouts, contrast, focus states and reduced-motion support
• ✓Chess960 positioned as an experiment within the wider ChessSim experience

September 6, 2026

Live simulations finish cleanly at terminal positions and build their story while the pieces are moving.

• ✓Checkmate and terminal-state completion
• ✓Stockfish timeout recovery
• ✓Immediate story beats
• ✓Permanent replay support when available

September 6, 2026

All 960 legal starting positions joined the Arena with variant-aware castling, analysis, replay and PGN export.

• ✓Chess960 position explorer
• ✓Complete castling legality
• ✓Variant-aware Stockfish
• ✓Chess960 replay and export

September 5, 2026

The board and story became one synchronized experience, with chapters reserved for the moments that change the game.

• ✓Board-and-story replay
• ✓Move importance levels
• ✓Bilingual narrative layers
• ✓Explicit match provenance

August 18, 2026

Browser-based Stockfish analysis added live evaluation, best moves and full-game review.

• ✓In-browser engine
• ✓Evaluation bar
• ✓Move classification
• ✓Analysis caching

August 17, 2026

ChessSim gained live simulations, replay controls and PGN export.

• ✓Live Arena
• ✓Agent selection
• ✓Replay controls
• ✓PGN export

August 17, 2026

The first public ChessSim experience introduced curated matches, replay and editorial commentary.

• ✓Homepage
• ✓Curated Demo Stories
• ✓Move-by-move replay
• ✓Editorial match presentation