The new 4-player chess variant
Matemarch
Chess is better together.
Experience the strategic beauty of chess in a whole new dimension: four players, two teams, a huge 10×10 board and the unique center-line handover that demands real teamwork.
Everything at a glance
Interactive 10×10 board
Start a game right away! Move minimalist pieces on the large 10×10 board, use the move hints and experience rounds with four players.
The center-line handover
The core innovation: when your piece crosses the center line, your teammate takes command. Coordinate devastating flank attacks!
Game modes & bots
Play locally on one device (hotseat), against bots in three strengths, or online with friends using a room code.
Two kings per team
Each partner is responsible for their own king. But beware: if a single king falls, the game is lost immediately.
Play
Choose a mode and start a game.
Local game
All four players share this device and take turns: White 1 → White 2 → Black 1 → Black 2.
The rules of Matemarch
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Strategy & tactics
About Matemarch
"Chess is better together."
- 10×10 board & 40 pieces in 3 styles – fully interactive
- Center-line zones – Player 1 (a–e) & Player 2 (f–j)
- Turn order – W1 → W2 → B1 → B2
- Play against bots – 3 AI levels (Beginner, Advanced, Master)
- Online with friends – room code, 2–4 players, bots on free seats (test phase, approved accounts only)
Country flags: flag-icons (MIT License)
Open-source software: Firebase JavaScript SDK (Apache License 2.0), Inter (SIL Open Font License 1.1) · THIRD-PARTY-NOTICES.txt
Settings
Changes apply immediately and are saved in this browser.
Board & pieces
Design the look of your board.
Gameplay
Optional rules
For local games and against bots. Online, the host chooses.
Profile
Other players see your name, picture, Elo, flag and bio. Picture and bio are optional.