Your mind is the algorithm. The board is your domain. Play, Calculate, Conquer.
The Hint feature provides suggestions for your next move. Each difficulty level gives you a different number of hints:
The Undo feature allows you to take back your last move. Each difficulty level gives you a different number of undos:
The Threats feature shows you which pieces are threatened by your opponent and which are protected by your pieces. Each difficulty level gives you a different number of threat visualizations:
The Threat Report provides a detailed analysis of threats, including a summary of immediate and potential threats, detailed list of threatened pieces with their priority levels, and recommended actions to handle the threats. Access the Threat Report via the advice button after using the Threats feature.
The Extra Time feature gives you additional time when you're running low. Each difficulty level gives you a different number of extra time uses:
The Refill feature becomes active when you've used all available hints, undos, threat visualizations, and extra time uses. When you click the Refill button:
Note: The Refill button only activates when all features are completely depleted. Payments are processed securely via Pi Network.
Choose a look for your board. Brown is free by default, while Green, Pink, and Blue are premium themes you can unlock instantly with Pi:
Note: Once you unlock a premium theme, it stays unlocked for good. To change or unlock a theme, go back to the theme selection page. The Pi price is calculated at the current market rate. You can also unlock all remaining premium themes at once for 15% off the combined price instead of paying for each one separately.
Choose how your chess pieces look, independently of your board color. Neo is free by default, while Wood, Glass, and Marble are premium sets you can unlock instantly with Pi:
Note: Any piece set works with any board theme — mix and match freely. Once unlocked, a piece set stays unlocked for good. The Pi price is calculated at the current market rate. You can also unlock all remaining premium piece sets at once for 15% off the combined price instead of paying for each one separately.
Each difficulty level has different time controls according to standard chess rules. Only Easy is unlocked from the start — unlock the rest by winning the previous level for free, or instantly with Pi:
The Pi price is calculated at the current market rate. You can also unlock all remaining levels at once for 15% off the combined price instead of paying for each one separately.
The timer starts when the game begins. Time pressure adds excitement to the game!
PGN (Portable Game Notation) is a standard format for recording chess games. You can use it to save, share, or analyze your games.
Use these features to review past games or study famous matches.
To surrender as white, double-click on your king when it's your turn. A confirmation dialog will appear. If you confirm, the game ends with black winning, and you'll see options for a new game or settings.
Note: If you want to pause the game for a break or to drink a cup of coffee, open the help icon and leave it active.