- Record moves in standard algebraic notation (GameState.SanHistory), built at
move time in ChessService (captures, disambiguation, castling, promotion,
en passant, and the check/mate suffix)
- Add PgnExporter.ToPgn (seven-tag header + movetext + result) and a
GET /api/chess/{gameId}/pgn endpoint
- Show a Copy PGN button when a game ends on both the play and watch pages,
prefetching the PGN so it works during the post-game cleanup window
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
- Track HalfmoveClock in GameState/ChessService (reset on captures and pawn moves)
- Emit the real halfmove clock in ToFen and add GameState.RepetitionHistory()
(prior positions since the last irreversible move) in ChessEngineHelpers
- Pass that history through IChessEngine.GetBestMoveAsync to the native engine;
Stockfish ignores it
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
- /watch live feed of active games with click-to-fullscreen and per-game back button
- Starting a new game forfeits the in-progress game; opponent is flagged the winner
- Watch CPU vs CPU self-play games; results shown for ~30s before cleanup
- Detect threefold repetition in the C# rules layer and end the game as a draw
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
