Klar

Requirements

Operating system: Windows 10 or Windows 11, version 20H2 or newer. Custom, modified or Insider builds and Windows Enterprise LTSC are not supported.

Browser: Google Chrome, installed and up to date.

Sites: Chess.com and Lichess.org.

Before You Start

• Turn Off Windows Security Features: Turn off Real-time protection (Windows turns it back on after a restart, so Klar recommends Defender Control to keep it off), Memory Integrity and Control Flow Guard (CFG). If you forget, the loader turns them off for you and asks you to restart your PC.
• Close Conflicting Software: Turn off Riot Vanguard (otherwise the loader shows an error asking you to unload vgk.sys) and make sure no game protected by BattlEye or Easy Anti-Cheat is running. Turn off or uninstall third-party antivirus (e.g. Kaspersky, Malwarebytes, Norton 360, Avast, McAfee) and close RAM cleaners, game boosters, ReShade, Medal and MSI Afterburner / RTSS. Full list: Klar's conflicting software list.

Activation & Launch

• Download the Loader: Go to klar.gg/loader and wait a few seconds for the download to start automatically. If Chrome or Edge says the file is unsafe or dangerous, that is a false positive (the loader manipulates memory to run the cheat), so choose to keep the file.
• Run as Administrator & Sign Up: Right-click the loader and choose Run as administrator. Loader accounts are separate from klar.gg forum accounts: the first time, click SIGN UP below the LOG IN button, fill in the form and press REGISTER. The account is locked to your PC's hardware ID (HWID). If your HWID changes (Windows reinstall, Secure Boot switched on or off, new hardware), the loader shows HWID mismatch and Klar support has to reset it.
• Your key goes here Redeem Your Key: Log in, select Chess, paste your license key into the text box at the bottom right of the loader and press START. Your key starts to expire the moment you press START.
• Launch Klar Chess: Close the side window, click Chess again and press the full-width START button. The loader opens its own Google Chrome window: choose chess.com or lichess.org there and start a game. The cheat only works in the window the loader opens, not in your normal browser, and there is no browser extension to install.
• Configure & Play: Set Depth, Max Elo, Move Delay and Max Random Delay, then choose Auto Move (Klar plays the move) or Display Best Move (Klar shows the move and you play it).

Status & Help

Klar Chess guide (settings and error codes): How to use Klar.gg Chess

Product status: status.klar.gg

Error messages: Klar FAQ at forum.klar.gg/forum/45-faq