Don’t play the engine move
Copy Stockfish’s first choice and its rating goes up 100. Play something else and nothing happens. The engine gets harder when you cheat the rule.
Don’t play the engine move
Copy Stockfish’s first choice and its rating goes up 100. Play something else and nothing happens. The engine gets harder when you cheat the rule.
Your move
Your own rules
A rule is a trigger, an effect and an amount: engine top move, any other move, capture, non-capture, a move that loses 1.00 or more, check or promotion, set to gain or lose Elo. Named modes below start with the rules already on; /play is the blank customiser.
The engine follows you
The number that moves is Stockfish's rating, between 0 and 3190. Gain Elo makes the game harder; lose Elo makes it easier. On a “don’t” mode, breaking the rule raises Stockfish. On a “reward” mode, doing the thing drops it. An empty rule list is an ordinary game.
Game URLs and review
Each game has its own link that replays it. A finished game opens as a game review, or set a position up first on the sandbox board.