Enjoy a deep chess experience – solo or online – with Just Chess!

Whether you're a beginner or a seasoned player, Just Chess has everything you need. Sharpen your skills against a smart AI in a modern 3D environment, test your tactical vision with over four million chess puzzles, or challenge the world with comprehensive Lichess integration.

Key Features:

Built-in Chess Engine – Play offline instantly using the game's internal chess engine, no setup required.
UCI Engine Support – Take your game to the next level by connecting any external chess engine that supports the UCI protocol, such as Stockfish. Play against opponents at – and even beyond – grandmaster strength.
Advanced UCI Profile Manager – Take full control of your imported engines. Create, rename, and save multiple custom profiles for any external engine. Adjust core settings like Hash (RAM), Threads (CPU), and Skill Level seamlessly from the UI, or dive into engine-specific advanced parameters for the ultimate tailored experience.
Engine vs Engine (EvE) – Curious to see which engine is stronger? Select two of your custom UCI engine profiles and watch them battle it out. Use the quick-adjust sliders in the lobby to independently scale the hardware limits and strength of both engines on the fly before the match begins.
Puzzle Arena – Test your skills and improve your tactical awareness with a massive database of over four million puzzles from Lichess. Try different modes like the fast-paced Puzzle Blitz and the endurance-testing Puzzle Run.
Lichess Integration – Log in to your Lichess account directly from the game!
- Challenge friends or millions of other players online.
- Play against Lichess's own Stockfish AI at various difficulty levels.
- Continue your ongoing correspondence or real-time games.
- All online games are seamlessly synchronized with your Lichess account.
- Spectate Live Tournaments – Follow top-level chess events in real-time with the new Lichess Broadcasts integration. Watch grandmaster games unfold live, directly within the game's immersive 3D environment.
When playing against the computer, the following tools are available.
- The hint function calculates and color-codes the three best move options on the board, and you can preview their possible continuations directly on the board.
- The move analysis calculates color-coded evaluations and scores for your selected piece, and if a variation is available, you can preview it directly on the board.
- The threat analysis displays arrows and evaluations on the board representing the opponent’s threats.

3D Chessboard – With an adjustable viewing angle.

Flip & Reset View – Use F to switch the view from one side to the other, or hold it down to rotate the camera in 90-degree increments, and R to reset it to your playing side.
Chess Clocks & Time Controls – Play timed games with popular formats like Bullet (1+0), Blitz (5+3), Rapid (10+5), and Classical (30+0, 90/40). Time controls under 10 minutes are supported with both the built-in and UCI chess engines. Untimed mode is also available.
2D and 3D Chess Clocks – Switch between practical 2D and immersive 3D clock views using the C key. 3D clocks show remaining time as a circular diagram.
Adjustable Move Speed – Customize how fast the built-in or UCI chess engine plays its moves for a more relaxed or time-pressured experience. Combine with difficulty settings for a personalized challenge.
Easy to Play – Simple controls and an intuitive interface.
Adaptive AI Strength – Both the built-in and UCI chess engines can automatically adjust their strength based on your wins and losses, ensuring a balanced challenge.
PGN Export and Analysis – The game allows you to copy the chess game in PGN format to the clipboard and analyze it on online chess analysis websites. Online analysis may require an account with the analysis service provider.

Note: External chess engines must be downloaded separately. Please use only trusted sources. The developer is not responsible for third-party software.