Free to play · no downloads · no paid loot boxes
You never move a piece. You build the bot that does — and you decide, mid-game, when it should attack.
Takes one minute. No email required.
Every match is played move by move by a genuine chess engine: alpha-beta search, transposition tables, quiescence, a tapered evaluation. What your bot’s attributes change is the engine itself — how deep it searches, how far its tactical horizon reaches, how often it blunders.
Below 15 Tactics the quiescence search is switched off entirely, and the bot hangs pieces exactly like a beginner. Below 35 Endgame it genuinely botches rook and king against king. A weak bot is not a strong engine on low depth: it is a different player.
Each bot carries a stable seed that makes it misjudge the same positions the same way in every game. Two bots at identical ratings play nothing alike: one sacrifices on h7 and loses half its games spectacularly, the other trades into equal endings and grinds.
Turn energy and credits into permanent attribute growth. Every attribute has a hidden ceiling — its potential. Scouting reveals it.
Processors, memory, cooling, power supplies, neural modules and opening books. Each one changes a real engine parameter, not a damage number.
Spend instruction points mid-match: go for the attack, calculate deeply, trade and simplify. The engine actually obeys.
Eight divisions, Swiss and knockout tournaments, a season that resets and rewards.
Buy and sell bots on a market that grows with you. Untrained high-potential bots are the expensive ones — which is why scouting is worth paying for.
Export any bot as a portable genome file and run it as a UCI engine in Arena, Cute Chess, Banksia, En Croissant or Nibbler. It plays exactly as it plays here — blunder rate and personality included. Your trained bot can enter a real engine tournament.
node uci/cbm-uci.mjs MYBOT.botxYes. The whole game is playable without paying, and every token can be earned by playing. You may optionally buy tokens or a one-off Manager’s Licence to save time. There are no randomised paid rewards, no loot boxes and no gambling: every purchase states exactly what it contains before you pay.
No. You manage the bot; the bot plays. Knowing chess makes watching more fun and helps you read a position during a critical moment, but the game never asks you to find a move — unless you choose to spar against your own bot.
A manager name and a password, and that is it. No email, no real name, no age, no tracking, no analytics and no advertising. You can download or delete everything from Settings at any moment.
English, Spanish and Italian, including chess notation in each — figurine, localised letters or English letters.
Yes. The layout collapses to a single column with a bottom tab bar, and the board sizes itself to the viewport.