ChessGame

The ChessGame class represents a complete chess game, managing the board state, move history, and game logic. It provides methods for making moves, undoing/redoing moves, loading/saving positions in FEN/PGN formats, and querying the game's status. This class encapsulates the rules and mechanics of chess, ensuring valid gameplay and tracking the progression of the game.

Overview

• Tracks the current Board state and GameState, including turn, castling rights, en passant targets, and clocks.

• Maintains a history of moves and positions for undo/redo functionality and repetition detection.

• Supports legal move generation, move validation, and game result determination.

• Provides utility methods for interacting with the game using SAN (Standard Algebraic Notation) and UCI (Universal Chess Interface).

Internal Implementation Details

State Management

• The current board state is stored in the board property, and the game state in gameState.

• Move history is tracked in moveHistory, with currentMoveIndex indicating the active move.

• Position history is stored as FEN strings in positionHistory for repetition detection and undo/redo functionality.

Move Handling

• The system validates moves against the list of legal moves generated by LegalMoveGenerator.

• It handles special moves such as castling, en passant, and pawn promotion seamlessly.

• It supports undo and redo by replaying moves from the initial position.

Example of Usage

val game = ChessGame()
println(game.getBoard()) // Print initial board
game.makeSanMove("e4")
game.makeSanMove("e5")
println(game.getFen()) // Print FEN after two moves

Example of Internal Access

val game = ChessGame()
val legalMoves = game.getLegalMoves()
val move = legalMoves.first()
game.makeMove(move)
println(game.getFen())