<!— Chess Royale — Product Description (HTML only) Copy everything inside the block and paste it into your marketplace HTML description field. Creator: squaregames —>

♔ Chess Royale — Complete HTML5 Chess Game with AI

Chess Royale is a polished, ready-to-publish browser chess game built with pure HTML5, CSS3, and JavaScript. Play against a smart AI opponent, enjoy a beautiful cartoon-style UI, and deploy instantly to any website — no backend, no database, no framework required.

Perfect for game portals, educational sites, portfolios, kids’ websites, or anyone who wants a professional chess experience that works on desktop and mobile.

✨ Key Features

Full chess rules — check, checkmate, castling, en passant, pawn promotion, stalemate, draws
AI opponent — Minimax algorithm with Alpha-Beta pruning
3 difficulty levels — Easy (Rookie), Medium (Challenger), Hard (Master)
Time controls — no limit, 10 minutes, or 15 minutes per player
Play as White or Black
Elo-style rating system — saved locally for the player
Hint system — 3 hints per game
Undo move — once per turn (player move + AI reply)
Draw offer — AI evaluates and accepts or declines
Move animations — smooth piece movement
Legal move highlights — optional dots on valid squares
Board coordinates — toggle a–h / 1–8 labels
Flip board — ideal when playing as Black
Sound effects — move, capture, check, castle, win, lose
Background music — separate tracks for menu, in-game, victory, and defeat
Responsive design — optimized for phones, tablets, and desktops
Web Worker AI — AI thinks without freezing the UI
Clean, modular code — easy to read, edit, and rebrand

Game Screens

Loading screen — animated progress bar and logo
Main menu — difficulty, time, color selection, Play button
Game screen — player cards, timers, rating, VS badge, chess board, controls
Promotion modal — choose Queen, Rook, Bishop, or Knight
Game over modal — result, rating change, Rematch / Main Menu
Settings modal — sound, animations, hints, coordinates, board flip
Confirm modals — surrender, leave game, draw offer

What You Get

Complete game source code (index.html + CSS + JavaScript)
SVG piece images, UI icons, avatars, and background pattern
Separate documentation page with full setup and customization guide
Separate CSS for game and documentation (no style conflicts)
AI engine with Web Worker support
Music system (Web Audio — no external audio files required)
Asset manager with emoji fallbacks if images fail to load

Technical Details

Technology	HTML5, CSS3, Vanilla JavaScript
Chess Engine	chess.js v0.10.3 (CDN)
AI Algorithm	Minimax + Alpha-Beta + Piece-Square Tables
Frameworks	None — lightweight and fast
Backend	Not required — 100% client-side
Database	Not required — uses localStorage
Mobile	Touch-friendly, responsive layout
Browser	Chrome, Firefox, Safari, Edge (modern versions)

Easy Setup

Upload the project folder to your web host or run a local server
Open index.html in the browser
Tap “Tap to continue” on the loading screen
Choose settings and press Play

Local test (Python):
python -m http.server 8080
Then visit: http://localhost:8080

Easy Customization

Replace piece images in assets/pieces/
Swap logo and icons in assets/icons/
Change colors via CSS variables in css/style.css
Edit AI strength in js/chess-ai.js (depth, rating, name)
Adjust default settings in js/app.js
Modify music in js/music.js
Rebrand title and logo in index.html

Full step-by-step customization guide is included in the documentation file.

File Structure

Game/
├── index.html
├── css/style.css
├── js/
│   ├── app.js
│   ├── game.js
│   ├── chess-ai.js
│   ├── chess-ai-worker.js
│   ├── music.js
│   └── assets.js
└── assets/
    ├── pieces/
    ├── icons/
    ├── avatars/
    └── game-bg-pattern.svg

Documentation/
├── documentation.html
└── documentation.css

Why Choose Chess Royale?

Ready to use — open and play immediately
Commercial quality UI — cartoon gold/cream style, modern and fun
Real chess logic — not a simplified demo; full rule support
Smart AI — challenging opponent with multiple difficulty levels
Well organized code — separate modules for game, AI, music, assets, and app flow
No monthly fees — host anywhere as static files
Documentation included — save hours of figuring things out

Requirements

Any modern web browser
A web server for local testing (or upload to hosting)
Internet connection for chess.js CDN (can be switched to local file)

Credits

Product: Chess Royale v1.0
Creator: squaregames
Build Date: June 8, 2026
License: Single purchase — check your marketplace license terms

Thank you for your purchase! We hope Chess Royale brings value to your project. For setup help, open the included documentation file.

Chess Royale — HTML5 Chess Game