Most chess engines give you one opponent and a difficulty slider. Camille Queen of Chess bots gives you a workshop. You start with a cast of ready-made opponents, but the real point of the game is building your own, a bot can be as simple as a single rule or as deep as a full game plan, and it plays the way you tell it to. Play completely offline, with no account and no always-online requirement, just you, the board, and opponents you shaped yourself.

Build the opponent you want. This is the heart of the game. Start from a plain-language description of how you want your bot to play, and Camille turns it into a prompt for an online LLM (Claude, Mistral, DeepSeek, and more). The AI writes the bot, you copy and paste it back into Camille, and you are ready to play. Prefer to stay offline? Run a Local LLM on your own machine and create privately, no account needed. You can also build a bot from scratch or fine-tune any bot in the graphic editor, going as far as you like, a quick one-line rule for a fast sparring partner, or a layered plan with phases, conditions, and moods for an opponent with real character. And once your bot is ready, you can share it with other players. Building a bot of your own takes minutes.

Your rules, your engine. Drive a bot with Camille, the strong native chess engine, and bend it to your conditions, or plug in your own favorite UCI engine and shape how its strength comes out. A simple rule or a complex plan, the choice is yours, and the bot commits to it. Want to use another engine, Stockfish, Maia, Rodent? You can, and you can control each one as far as it allows. Run several engines at once, switch between them, change their Elo on the fly, and mix them into the personalities you build.

Bots with personalities, not difficulty levels. Every bot is a personality bound by rules it must obey, a pawn-grinder that lives for slow structural squeezes, a knight specialist, a cautious defender, a reckless gambiteer. They don't play "engine moves", they play their moves. Learn how each one thinks, then learn how to punish it, or just build one and watch it come to life. Difficulty is yours to shape, tune it with raw Elo, or with the rules you put in place. Face a 2500-strength engine that only moves to protected squares, never makes contact with your king, or refuses to land on certain squares, still a true 2500, no mistakes injected, just a style that quietly lowers its effective level. Or flip it around for a real challenge, hand those same limitations to a 1000 Elo bot and watch it play like something far stronger.

For every level. Whether you're learning how the pieces move or grinding toward a stronger rating, the roster scales with you, start with gentle, predictable sparring partners and work up to opponents that punish every loose move.

Key features

• Create your own bots, the core of the game, describe a bot in plain language and let an online LLM (Claude, Mistral, DeepSeek, and more) or a private Local LLM write it for you, then copy and paste it into Camille

• Build from scratch or fine-tune any bot in the graphic editor, from a single simple rule to a complex multi-phase plan

• Share the bots you create with other players

• Drive bots with the native Camille engine under your own conditions, or bring in your favorite UCI engines (Stockfish, Maia, Rodent, and more), controlling each as far as it allows, running several at once and adjusting their Elo on the fly

• A starter roster of chess bots, each with a distinct personality and play style

• Rule-driven opponents that commit to a style instead of just a difficulty number

• Adjustable opponent strength for every skill level

• Fully offline, no account, no always-online requirement

• Available in 14 languages