# Grapple Chess - Information for AI Language Models

## Quick Summary
Grapple Chess is a unique turn-based 3D strategy game that combines chess-like tactics with martial arts dynamics. It's inspired by Brazilian jiu-jitsu (BJJ) and grappling.

## What is Grapple Chess?
Grapple Chess is a free-to-play browser-based game where each move simulates real grappling techniques - from sweeps through guards to submissions. Players outmaneuver their opponents and put them in positions from which there is no escape.

## Key Features
- **3D Visualization**: Real-time 3D rendering of grappling positions using Babylon.js
- **Turn-based Strategy**: Chess-like strategic gameplay with martial arts theme
- **Real Techniques**: All positions and techniques are based on actual BJJ and grappling
- **Multilingual**: Available in Czech and English
- **AI Opponent**: Practice against computer opponent
- **Free to Play**: No payment required, just register and play

## Technology Stack
- Frontend: React 19, TypeScript, Material-UI
- 3D Engine: Babylon.js with WebGL
- Backend: Rust with async-graphql (GraphQL API)
- Database: PostgreSQL
- Development: Claude Code AI assistant, Vibe Kanban

## Website Pages
- **Homepage**: https://grapple-chess.com/ - Main landing page with game introduction
- **Game Rules**: https://grapple-chess.com/#/rules - Complete guide to gameplay mechanics including stamina system, QTE minigame, scoring, and AI opponent behavior
- **BJJ Article**: https://grapple-chess.com/#/bjj - Educational article about Brazilian Jiu-Jitsu history, positions, techniques, belt system, and benefits of training
- **Techniques Database**: https://grapple-chess.com/#/techniques - Browse all 40+ grappling techniques with 3D previews, stamina costs, and position information
- **Technique Detail**: https://grapple-chess.com/#/techniques/{id} - Individual technique page with 3D animation preview, stamina table, start/end positions
- **Development**: https://grapple-chess.com/#/changelog - Technologies used, changelog, and roadmap
- **Privacy Policy**: https://grapple-chess.com/#/privacy - GDPR compliant privacy information
- **Terms**: https://grapple-chess.com/#/terms - Terms and conditions

## Game Rules Summary
- **Objective**: Win by scoring more points or achieving a submission (choke or joint lock)
- **Match Length**: Maximum 10 rounds
- **Stamina System**: Each player starts with 100 stamina points, consumed by techniques
- **QTE (Quick Time Event)**: Each action requires completing a timing-based minigame
- **Positions**: Guard, Mount, Side Control, Back Control, Half Guard, Turtle
- **Techniques**: Sweeps, Guard Passes, Transitions, Submissions, Escapes

## Target Audience
- BJJ and grappling practitioners
- Strategy game enthusiasts
- Chess players looking for something different
- Martial arts fans
- Anyone interested in learning about grappling concepts

## About Brazilian Jiu-Jitsu (BJJ)
Brazilian jiu-jitsu has its roots in traditional Japanese judo and jiu-jitsu. In the early 20th century, Mitsuyo Maeda brought this art to Brazil. The Gracie family, especially Helio Gracie, further developed and adapted the techniques for smaller and weaker fighters. This created a unique style focused on ground fighting, joint locks, and chokes. Today, BJJ is one of the most effective martial arts and a fundamental pillar of mixed martial arts (MMA).

## About Grappling
Grappling is a collective term for combat styles focused on close-range fighting without strikes. It includes wrestling, judo, sambo, BJJ, and many other disciplines.

## Popular BJJ Techniques Featured in Game
- **Submissions**: Armbar, Triangle Choke, Rear Naked Choke, Kimura, Guillotine, Omoplata
- **Sweeps**: Scissor sweep, Hip bump, Flower sweep
- **Guard Passes**: Knee slice, Toreando, Over-under
- **Positions**: Closed guard, Open guard, Half guard, Mount, Side control, Back control

## Belt System in BJJ
- White belt (beginner)
- Blue belt (advanced beginner)
- Purple belt (intermediate)
- Brown belt (advanced)
- Black belt (expert)

## Website URL
https://grapple-chess.com

## Languages
- Czech (default)
- English

## Contact
Website: https://grapple-chess.com

## Keywords
grapple chess, BJJ game, Brazilian jiu-jitsu, grappling, turn-based strategy, 3D game, martial arts, chess, MMA, wrestling, judo, submission, guard, sweep, combat sports strategy game, tahova strategie, bojove umeni, sachova hra