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πŸ“ Update README.md after knight move generation (Issue #9)
- Update the development roadmap in `README.md` to reflect the completion of knight move generation - Mark Knight Move Generation as complete (βœ…) - Update Phase 2 progress to 80% - Set King Move Generation as the next priority - Ensure all other documentation remains consistent and up-to-date
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β€ŽREADME.md

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# ✨ JS Chess Engine
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# β™” JS Chess Engine
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> **A pure JavaScript chess engine inspired by the legendary Atari Video Chess, designed to outplay the original through superior AI and modern web technologies.**
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---
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## πŸš€ Project Description
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## 🎯 Project Description
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### The Vision
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### What Problem Does This Solve?
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**For Chess Enthusiasts:**
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- Provides a pure JavaScript chess implementation that runs entirely in the browser
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- Offers an AI opponent with adjustable difficulty levels
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- Enables chess learning through position analysis and move suggestions
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**For Developers:**
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- Demonstrates advanced JavaScript patterns including ES2022 private fields
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- Showcases modular architecture with clean separation of concerns
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- Provides a comprehensive testing framework for complex game logic
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**For AI Researchers:**
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- Implements classic game AI algorithms (Minimax with Alpha-Beta pruning)
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- Offers a platform for experimenting with chess evaluation functions
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- Enables comparison with historical chess engines
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## πŸ› οΈ Getting Started
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## πŸš€ Getting Started
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### Prerequisites
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Navigate to `http://localhost:8080` to see the chess engine in action.
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#### Development Commands
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```bash
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# Development server
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npm start # Start live development server on port 8080
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npm start # Start live development server on port 8080
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# Testing
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npm test # Run all tests
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npm run test:watch # Run tests in watch mode
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npm run test:coverage # Run tests with coverage report
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npm test # Run all tests
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npm run test:watch # Run tests in watch mode
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npm run test:coverage # Run tests with coverage report
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# Code Quality
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npm run quality:check # Check code formatting and linting
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npm run quality:fix # Auto-fix formatting and linting issues
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npm run lint:check # Check ESLint rules (zero warnings)
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npm run format:check # Check Prettier formatting
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npm run quality:check # Check code formatting and linting
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npm run quality:fix # Auto-fix formatting and linting issues
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npm run lint:check # Check ESLint rules (zero warnings)
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npm run format:check # Check Prettier formatting
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# Security
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npm run security-check # Check for security vulnerabilities
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npm run security-fix # Fix security vulnerabilities
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npm run security-check # Check for security vulnerabilities
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npm run security-fix # Fix security vulnerabilities
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```
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#### Project Structure
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```
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js-chess-engine/
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β”œβ”€β”€β”€ src/
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β”‚ β”œβ”€β”€β”€ core/ # Chess logic foundation
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β”œβ”€β”€ src/
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β”‚ β”œβ”€β”€ core/ # Chess logic foundation
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β”‚ β”‚ β”œβ”€β”€ Board.js # Board representation and state
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β”‚ β”‚ β”œβ”€β”€ Piece.js # Piece definitions and validation
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β”‚ β”‚ β”œβ”€β”€ GameState.js # Game state management
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β”‚ β”‚ β”œβ”€β”€ MoveGenerator.js # Move generation algorithms
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β”‚ β”‚ └── ...
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β”‚ β”œβ”€β”€β”€ ui/ # User interface components
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β”‚ β”œβ”€β”€ ui/ # User interface components
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β”‚ β”‚ β”œβ”€β”€ BoardRenderer.js # Visual board rendering
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β”‚ β”‚ β”œβ”€β”€ InputHandler.js # User input processing
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β”‚ β”‚ └── styles.css # Styling and themes
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β”‚ β”œβ”€β”€β”€ ai/ # AI engine (future implementation)
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β”‚ └─── utils/ # Shared utilities
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β”‚ └── Constants.js # Game constants and piece values
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β”œβ”€β”€β”€ tests/ # Test files
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β”œβ”€β”€β”€ index.html # Main HTML entry point
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└─── package.json # Project configuration
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β”‚ β”œβ”€β”€ ai/ # AI engine (future implementation)
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β”‚ └── utils/ # Shared utilities
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β”‚ └── Constants.js # Game constants and piece values
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β”œβ”€β”€ tests/ # Test files
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β”œβ”€β”€ index.html # Main HTML entry point
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└── package.json # Project configuration
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```
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#### Quick Start Guide
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- βœ… **Architecture Documentation** ([#37](https://github.com/jane-alesi/js-chess-engine/issues/37)) - Mermaid diagrams and contribution guidelines
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- βœ… **Status Badges & Roadmap** ([#38](https://github.com/jane-alesi/js-chess-engine/issues/38)) - CI/CD transparency and project roadmap
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**Outcome**: Complete professional documentation foundation enabling efficient contributor onboarding
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**Outcome**: Complete professional documentation foundation enabling efficient contributor onboarding.
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---
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- βœ… **Pawn Move Generation** ([#4](https://github.com/jane-alesi/js-chess-engine/issues/4)) - Forward, double, and capture moves
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- βœ… **Rook Move Generation** ([#2](https://github.com/jane-alesi/js-chess-engine/issues/2)) - Horizontal and vertical movement patterns
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- βœ… **Bishop Move Generation** ([#1](https://github.com/jane-alesi/js-chess-engine/issues/1)) - Diagonal movement patterns
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- πŸ”„ **Knight Move Generation** ([#9](https://github.com/jane-alesi/js-chess-engine/issues/9)) - L-shaped movement patterns
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- βœ… **Knight Move Generation** ([#9](https://github.com/jane-alesi/js-chess-engine/issues/9)) - L-shaped movement patterns
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- πŸ”„ **King Move Generation** ([#7](https://github.com/jane-alesi/js-chess-engine/issues/7)) - Single-square movement patterns
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- πŸ”„ **Queen Move Generation** ([#6](https://github.com/jane-alesi/js-chess-engine/issues/6)) - Combined rook and bishop patterns
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- πŸ“… **Queen Move Generation** ([#6](https://github.com/jane-alesi/js-chess-engine/issues/6)) - Combined rook and bishop patterns
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**Current Status**: βœ… Pawn, Rook, and Bishop moves fully implemented with comprehensive testing
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**Next Priority**: Knight move generation (foundational for complex move validation)
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**Current Status**: βœ… Pawn, Rook, Bishop, and Knight moves fully implemented with comprehensive testing
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**Next Priority**: King move generation (foundational for complex move validation).
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- Pawn promotion
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- πŸ“… **Game Flow Orchestration** ([#14](https://github.com/jane-alesi/js-chess-engine/issues/14)) - Complete game state management
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**Dependencies**: Requires completion of Phase 2 (all piece move generation)
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**Dependencies**: Requires completion of Phase 2 (all piece move generation).
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- Advanced (depth 5-6)
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- Expert (depth 7+ with optimizations)
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**Target**: AI capable of defeating the original Atari Video Chess
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**Target**: AI capable of defeating the original Atari Video Chess.
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### **Progress Tracking**
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| Phase | Completion | Key Milestones | Target Date |
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| ----------- | ---------- | -------------------------------------------------------- | ------------ |
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| **Phase 1** | βœ… 100% | Professional documentation complete | βœ… June 2025 |
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| **Phase 2** | πŸ”„ 60% | Pawn, Rook, Bishop moves implemented, 2 pieces remaining | August 2025 |
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| **Phase 3** | πŸ“… 0% | Awaiting Phase 2 completion | October 2025 |
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| **Phase 4** | πŸ“… 0% | Awaiting Phase 3 completion | January 2026 |
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| **Phase 5** | πŸ“… 0% | UI/UX enhancements | March 2026 |
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| **Phase 6** | πŸ“… 0% | Performance & advanced features | June 2026 |
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| Phase | Completion | Key Milestones | Target Date |
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|--------------|------------|------------------------------------------------------------------|---------------|
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| **Phase 1** | βœ… 100% | Professional documentation complete | βœ… June 2025 |
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| **Phase 2** | πŸ”„ 80% | Pawn, Rook, Bishop, Knight moves implemented, 1 piece remaining | August 2025 |
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| **Phase 3** | πŸ“… 0% | Awaiting Phase 2 completion | October 2025 |
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| **Phase 4** | πŸ“… 0% | Awaiting Phase 3 completion | January 2026 |
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| **Phase 5** | πŸ“… 0% | UI/UX enhancements | March 2026 |
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| **Phase 6** | πŸ“… 0% | Performance & advanced features | June 2026 |
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### **Success Metrics**
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## πŸ“Š Current Status
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## πŸ› οΈ Current Status
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This project is actively under development with a focus on:
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βœ… **Core Foundation Complete**
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- Advanced game rules (castling, en passant, promotion)
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- Check and checkmate detection
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πŸš€ **Coming Next**
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🎯 **Coming Next**
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- AI opponent with multiple difficulty levels
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- Position evaluation and strategic play
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```mermaid
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flowchart TD
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subgraph "πŸš€ User Interface Layer"
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subgraph "🎨 User Interface Layer"
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UI[UI Module]
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BR[BoardRenderer]
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IH[InputHandler]
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BOOK[Opening Book]
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end
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subgraph "✨ Core Chess Logic"
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subgraph "β™” Core Chess Logic"
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CORE[Core Module]
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BOARD[Board]
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PIECE[Piece]
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RULES[Rules]
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end
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subgraph "🧩 Utilities"
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subgraph "πŸ”§ Utilities"
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UTILS[Utils Module]
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CONST[Constants]
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FEN[FEN Parser]
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Our JavaScript implementation honors this legacy while embracing modern capabilities:
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- **Then**: 4KB ROM, 128 bytes RAM β†’ **Now**: Unlimited memory and processing power
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- **Then**: 6502 assembly language β†’ **Now**: Modern JavaScript with advanced language features
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- **Then**: Simple evaluation function β†’ **Now**: Sophisticated AI with deep search algorithms
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- **Then**: Fixed difficulty β†’ **Now**: Adaptive AI with multiple skill levels
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- **Then**: 4KB ROM, 128 bytes RAM β”‚ **Now**: Unlimited memory and processing power
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- **Then**: 6502 assembly language β”‚ **Now**: Modern JavaScript with advanced language features
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- **Then**: Simple evaluation function β”‚ **Now**: Sophisticated AI with deep search algorithms
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- **Then**: Fixed difficulty β”‚ **Now**: Adaptive AI with multiple skill levels
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## πŸ’– Contributing
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## πŸ“œ Contributing
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We welcome contributions from both human developers and AI agents! This project uses an **Issue-Driven Development** approach where all work is tracked through GitHub Issues.
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## πŸ“œ License
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## βš–οΈ License
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This project is licensed under the **MIT License** - see the [LICENSE](LICENSE) file for details.
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**Project Link:** [https://github.com/jane-alesi/js-chess-engine](https://github.com/jane-alesi/js-chess-engine)
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_Built with ✨ by the chess programming community_
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_Built with β™” by the chess programming community_

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