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# Chess UI Implementation Details
## Overview
This implementation provides a modern, interactive web UI for the chess engine using React with TypeScript and Tailwind CSS. The UI is designed to be fluid, responsive, and user-friendly, addressing the limitations of the previous Streamlit interface.
## Key Features
1. **Interactive Chess Board**:
- Pieces can be moved by clicking on the source and destination squares
- Valid moves are highlighted with green dots
- Hint moves are highlighted with a light color
- Last move is animated for better visibility
2. **Visual Feedback**:
- Selected pieces are highlighted
- Legal moves are shown with green dots
- Hints highlight both source and destination squares
- Move animations provide visual feedback
3. **Game Controls**:
- New Game with configurable options (difficulty, color, time limit)
- Undo Move functionality
- Resign option
- Board theme selection (brown or grey)
4. **Game Information**:
- Current game status display
- Move history tracking
- Position analysis with evaluation bar
- Material and positional advantage indicators
## Technical Implementation
### Components Structure
1. **App.tsx**: Main application component that organizes the layout
2. **ChessBoard.tsx**: Handles the chess board rendering and interaction logic
3. **GameControls.tsx**: Provides game control buttons and options
4. **GameInfo.tsx**: Displays game status, move history, and analysis
### API Integration
The UI communicates with the backend REST API using Axios. The main endpoints used are:
- `/game/new`: Start a new game with specified options
- `/game/move`: Make a move on the board
- `/game/state`: Get current game state
- `/game/hint`: Get a hint for the current position
- `/game/undo`: Undo moves
- `/game/resign`: Resign the current game
### Chess Logic
- FEN parsing to render the board state
- Legal move validation through the API
- Piece movement handling
- Game state tracking
### Styling
- Tailwind CSS for responsive design
- Custom CSS for chess-specific styling
- Animations for piece movement
- Theme support for different board styles
## Asset Usage
The implementation uses the provided chess assets:
- Board squares from both brown and grey themes
- Chess piece images for both black and white pieces
## Future Enhancements
1. **Drag and Drop**: Implement drag-and-drop functionality for piece movement
2. **Sound Effects**: Add sound effects for moves, captures, and game events
3. **Move Notation**: Display algebraic notation for moves in the history panel
4. **Time Control**: Add chess clock functionality
5. **Opening Explorer**: Integrate an opening book explorer
6. **Game Analysis**: Enhanced post-game analysis features
7. **Local Storage**: Save game state to browser storage for resuming games |