Smart Chess AI with Python

Introduction

Chess is a game of strategy and intelligence, and building an AI opponent that plays chess at a competitive level is a fascinating challenge. This project is a basic implementation of a chess game with a graphical user interface (GUI), allowing both human vs. human and human vs. AI gameplay. The AI opponent is powered by the Negamax algorithm with Alpha-Beta pruning, ensuring optimal move selection and an engaging single-player experience.

Features

Graphical User Interface 🎨

• The game features a user-friendly interface built using the Pygame library.
• Clear visual representation of the chessboard and pieces for an enjoyable playing experience.

Two-Player Mode 🤝

• Engage in a classic human vs. human chess match.
• Both players take turns making moves on the same device.

AI Opponent 🤖

• Challenge yourself against an AI-powered opponent.
• The AI uses the Negamax algorithm with Alpha-Beta pruning to optimize its move selection.
• Provides a challenging yet balanced gameplay experience for single-player mode.

Checkmate, Stalemate, and Legal Moves ♟️

• Ensures all moves comply with standard chess rules.
• Detects game-ending conditions such as checkmate and stalemate.
• Highlights legal moves to guide players in making valid moves.

Advanced Chess Mechanics 🔄

• Supports essential chess mechanics:
  • Pawn promotion (automatically promotes a pawn to a queen when reaching the last rank).
  • En passant (captures pawns that have moved two squares forward from their starting position).
  • Castling (king and rook swap places for defensive positioning).

Undo and Reset Board 🔄

• Press ‘Z’ to undo the last move.
• Press ‘R’ to reset the board and start a new game instantly.

Variety of Chess Boards 🎨

• Play on different chessboard colors and themes.
• Customize the board appearance for a personalized experience.

Immersive Sounds and Images 🔊

• Multiple sound effects for piece movement and captures, enhancing the immersive experience.
• High-quality chess piece images for a visually appealing game.

How It Works

1. Game Logic & Rules 🏆

• The game follows standard chess rules, ensuring fair play.
• The engine.py module manages move validation, piece movement, and rule enforcement.

2. AI Decision Making 🤖

• The AI opponent selects moves using the Negamax algorithm, an optimized version of Minimax.
• Alpha-Beta pruning improves efficiency by cutting off unnecessary calculations, making the AI smarter and faster.

3. User Interaction & GUI 🎮

• Players interact with the game via the Pygame-powered GUI.
• Click-based interface for selecting and moving pieces.
• The board updates dynamically based on user or AI moves.