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Chess in which a piece can stand on two squares at once, until something asks where it really is.
Quantum Chess is a game for Nextcloud. Challenge colleagues and family with the notifications, avatars and dashboard you already use, play the computer or an AI opponent, or learn the game in ten minutes with the trainer. Twenty-one chess variants, from Bee Flow Chess and 5D chess to shogi and xiangqi, bring the same quantum rules to other boards.
| 🚀 Getting started | Install the app, find your way around and play your first game |
| ♟️ How to play | The quantum rules: split, merge, measure, rolls and links |
| 👥 Playing online | Invitations, open challenges, notifications, ratings and the leaderboard |
| 🤖 Computer and AI opponents | The five computer levels and AI opponents with a personality |
| 🎓 Trainer and review | Lessons, puzzles, the coach and the post-game review |
| 🌌 Chess variants | Twenty-one variants, from Bee Flow Chess to Multiverse chess (5D) |
| ⚙️ Settings | Your own options: board, display, moves, sound, coach and notifications |
| 🛠️ Administration | For Nextcloud administrators: installation, background jobs, multiplayer and AI |
| ❓ FAQ | Answers to the questions players ask most |
- The complete rules, with examples and a glossary: docs/rules.md
- Every variant's rules: docs/variants.md
- What changed in each version: Releases
- Questions and ideas: Discussions · Bugs: Issues