Chess, solved
in real time.

Chessr is a browser extension that turns chess.com, Lichess and Worldchess into your personal chess assistant. 5 engines run server-side (Stockfish 18, Komodo, Maia, Maia3, Rodent IV) so your machine stays cool and there's zero process for anti-cheat to fingerprint. You get real-time move suggestions, live evaluation, 12k+ openings, AI game reviews, and auto-move with humanized timing — all from the same Chrome extension.

Yes — 800+ players run it daily without a single anti-cheat hit. The engines run on our servers, never on your machine. The extension never tampers with chess.com's game state directly — it only reads moves from the page and overlays suggestions. Combined with humanized auto-move timing, your move tempo and accuracy stays statistically organic.

Chessr Premium is the full extension — 5 engines, auto-move, openings, live eval, plus game reviews. €2.99/mo or €50 lifetime. Review Unlocker is the standalone lite version on the Chrome Web Store at €1/mo — JUST chess.com game reviews (unlimited), no engine, no anti-cheat angle. Different products, different audiences. If you want to assist your games, get Premium. If you just want chess.com Diamond reviews for free, get the Unlocker.

The full spectrum from 300 (beginner) to 3500 (Stockfish max). Free users get ELO 300-2000, Premium unlocks the full 300-3500 range. The engine auto-detects your rating and adapts. Maia plays at specific human-like ELOs (1100, 1500, 1900) for the most natural cover.

Stockfish 18 (world #1, brute-force max strength), Komodo 14 (positional GM-level play), Maia 1100-1900 (trained on real humans, plays like a real player at the target rating), Maia 3 (newer human-imitation model), and Rodent IV with 8 personalities (Aggressive, Defender, Dynamic, Positional, Endgame, Active, Beginner, Engine). Switch engines mid-game.

Yes — Premium includes a 3-day free trial. Just link your Discord account, no credit card required. Each user gets one free trial. Cancel anytime, 14-day money-back guarantee on all paid plans.

Time-pressure aware mode for blitz and bullet. The engine biases toward fast, sharp moves when your clock drops under 30 seconds — even if they're technically suboptimal. Built for bullet hunters and time-trouble survivors.

Yes — on Android via Kiwi Browser and on iOS via Orion (both support Chrome extensions). On desktop, any Chromium-based browser works: Chrome, Edge, Brave, Arc. Stock iOS Safari and stock Android Chrome don't support extensions, so they're not compatible.

Yes — toggle Stream Mode and the overlays auto-hide on OBS capture. Move arrows and the eval bar stay visible to you locally but disappear for your viewers. Streamer mode is in the free tier.