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Chess variants
Open Chess variants in the navigation. Every variant keeps the quantum rules (split, merge, measure, "land = roll, pass = link", solid kings and pawns, the budget of 8) and, where they fit, the classic end rules.
| Group | Variants |
|---|---|
| Bee-Flow | Bee Flow Chess: protect your Queen Bee. Shuffled back ranks, enemy pieces hidden as honeycomb cells until they move, and a privacy shield around the queen |
| Other dimensions | 3D chess (Raumschach), Tri-Dimensional chess, 4D chess, Multiverse chess (5D) |
| Hidden information | Kriegspiel, Fog of war |
| Different rules | Chess960, Atomic, Crazyhouse, Bughouse, Antichess, King of the Hill, Three-check, Horde |
| Different boards and more players | Hexagonal chess, Four-player chess, Capablanca chess |
| Regional relatives | Shogi, Xiangqi, Makruk |
The rules of each variant: docs/variants.md. Inside the app, every variant's page explains its rules too.
The quantum version of 5D Chess With Multiverse Time Travel: timelines side by side, pieces that travel back in time and to other timelines, and ghosts across the whole multiverse, past boards included. It starts on the quick Small 5 × 5 board, and has every official piece and 44 official start positions.
| Computer | Easy, Normal or Hard |
| Pass & play | Two players, or four in Four-player chess and Bughouse. In Kriegspiel and Fog of war a hand-over screen keeps each player's view private until the game ends |
| Online | Against people on your Nextcloud, four players in Four-player chess and Bughouse. In Kriegspiel, Fog of war and Bee Flow Chess the server is the umpire and shows each player only their own view. Each two-player variant has its own rating and leaderboard |
On a phone, large boards zoom with a pinch and pan with a finger; 4D chess, 5D chess and Bughouse open on the boards you play.