ChessGen

Browser-playable chess plus the original Java console implementation.

Web version

Open web/index.html in a browser to play.

Files:

• web/index.html for the page structure
• web/styles.css for the board and layout (dark glass theme, animated board)
• web/engine.js for pure chess rules and state (no DOM — Node-testable)
• web/ai.js for evaluation and search
• web/app.js for the UI: rendering, input, sound, history

Features:

• Full legal move validation, verified against known perft counts
• Check, checkmate, stalemate, and draw detection (fifty-move rule, threefold repetition, insufficient material)
• Castling, en passant, and promotion
• Click-to-move board with last-move and in-check highlighting, board flip, and undo
• Move history in algebraic notation and a live captured-material tracker
• Iterative-deepening minimax AI with alpha-beta pruning, quiescence search on captures, and piece-square-table evaluation, bounded by a per-move time budget
• Synthesized sound effects (no external audio assets)

Java console version

javac -d out src\chess\*.java
java -cp out chess.ChessConsoleApp