Advanced Chess - Sidebar Game

About

### 📝 Title
Advanced Chess - Sidebar Game

### 📝 Short Description (132 characters max)
Full chess in Chrome sidebar: themes, sounds, flip, timers, undo, smart AI (3 levels) that only moves its side. Free, no ads.

### 📝 Detailed Description

**🏆 THE BEST CHESS GAME FOR YOUR SIDEBAR!**

Transform your Chrome sidebar into a complete chess platform! Play without interrupting your browsing, with a professional experience and all the features you need.

**🎮 GAME MODES**
✅ **Human vs Human** - Play locally with friends
✅ **Human vs Bot** - Challenge our intelligent AI
• Easy: Perfect for beginners
• Medium: Intermediate strategy  
• Hard: Challenge for experienced players

**♛ COMPLETE FEATURES**
✅ **All official rules** - Castling, en passant, promotion, threefold, 50-move rule
✅ **Automatic detection** - Check, checkmate, stalemate, draws
✅ **Integrated timers** - Presets (5/10/15/30) with highlights for low time
✅ **Complete history** - Grouped move list with last-move highlights
✅ **Undo moves** - In bot games, undo reverts both player and AI moves
✅ **Visual suggestions** - Valid moves and captures highlighted
✅ **Promotion modal** - Clear piece icons + keyboard shortcuts (Q/R/B/N)
✅ **Castling hints** - Explains why castling is blocked
✅ **Preferences saved** - Theme, sound, flip, and timer persist

**🎨 PREMIUM DESIGN**
✅ **Themes** - Classic, Dark, and High Contrast for accessibility
✅ **Sound toggle** - Move, capture, check, and game-over cues
✅ **Flip board** - Play from either perspective
✅ **Responsive** - Optimized for sidebar with `clamp()` sizing
✅ **Readable UI** - High-contrast move list, captured pieces, and controls
✅ **Unicode pieces** - Sharp symbols at any resolution

**🔒 TOTAL PRIVACY**
✅ **No data collection** - Play with complete privacy
✅ **Works offline** - No internet required
✅ **No ads** - Clean, focused experience
✅ **No tracking** - Your games are 100% private

**⚡ OPTIMIZED PERFORMANCE**
✅ **Instant loading** - Ready in under a second
✅ **Responsive AI** - Async hard mode to keep the UI smooth
✅ **Low consumption** - Lightweight, no external deps
✅ **Manifest V3** - Latest Chrome technology

**🎯 PERFECT FOR:**
• Chess players of all levels
• Anyone wanting to practice during work breaks
• Students learning chess
• Friends who want to play locally
• Anyone who values privacy and performance

**🚀 HOW TO USE:**
1. Click the extension icon
2. Sidebar opens automatically
3. Choose your game mode
4. Start playing immediately!

No complicated setup, no registration, no complications. Just pure, quality chess in your sidebar!

**🏅 UNIQUE FEATURES:**
• Optimized for the Chrome sidebar (side panel)
• AI with Minimax + alpha-beta, move ordering, quiescence
• AI is locked to its color and validates moves to avoid errors
• Clean, responsive design with accessibility-focused themes
• Completely free with no limitations or ads

Install now and discover why we're the #1 choice for chess in Chrome!

### 📝 Supported Languages
• English (Primary)

### 📝 Screenshots (Suggestions)
1. **Main Screen** - Complete board in sidebar with game in progress
2. **Mode Selection** - Dropdown showing Human vs Human/Bot options
3. **Highlighted Moves** - Selected piece with valid moves in blue
4. **Move History** - Side panel with complete move list
5. **Pawn Promotion** - Piece selection modal during promotion
6. **Timer and Information** - Panel with timer, captured pieces and status

### 📝 Target Audience
• Age: 8+ (appropriate for all ages)
• Casual and serious chess players
• Professionals who want to relax during breaks
• Students and strategy enthusiasts
• Users who value privacy

### 📝 Unique Selling Points (USP)
1. **Only chess game optimized for Chrome sidebar**
2. **Completely private - zero data collection**
3. **Professional AI with 3 difficulty levels**
4. **Premium interface without ads**
5. **Optimized performance - instant loading**
6. **Works 100% offline**

### 📝 Call-to-Action
"Install now and play professional chess in your sidebar! 100% free and ad-free."

Reporting Issues:
Bug Reports: Provide detailed reproduction steps
Feature Requests: Describe use cases and issue
Performance Issues: Include system specs

Repository: https://github.com/Drete457/advanced_chess_sidebar_game