Warning
Knight — Chess Helper is a chess training and analysis tool designed for educational and self-improvement purposes.It is not a cheat. The extension runs entirely locally using Stockfish WebAssembly, performs all calculations in your browser, and does not interact with or send any data to Chess.com servers.However, using any kind of engine assistance during rated online games violates Chess.com’s Terms of Service and may result in account penalties. We strongly recommend using Knight only in the following cases: Training games Game analysis Play against computer Study and improvement purposes The author is not responsible for any consequences resulting from misuse of this tool. Please use it responsibly and in accordance with the spirit of fair play.
- 🤖 Auto-Play — Automatically execute moves on your behalf with natural, randomized human delay and organic mouse paths.
- 🧠 100% Local Engine — Powered by a local Stockfish WebAssembly engine. It performs all calculations inside an isolated, secure background process without making third-party server calls, bypassing Chess.com's strict Content Security Policy (CSP).
- 🎲 Behavioral Human Presets — Instantly choose from multiple curated play styles (Beginner, Intermediate, Advanced, Aggressive, Positional), or unlock Custom Controls to manually adjust blunder rates, mouse speeds, and thinking time variance.
- 🛡️ Anti-Ban 3.0 Emulations — Deeply integrated behavioral parameters to evade detection:
- Mouse Movement 2.0: Smooth Bezier curves with micro-tremors (physical hand vibrations).
- Mouse Misclicks: A small percentage chance to click a neighboring square first, pause in hesitation, cancel, and then play the correct move.
- Emulated Fatigue: Thinking times naturally slow down by 2.5% per turn as the game progresses past move 15, mimicking mental fatigue.
- Random Distractions: Randomly takes a long, natural pause of 8-15 seconds to simulate a player stepping away from the screen.
-
Dynamic Search Depth: Stockfish search depth randomly fluctuates by
$\pm 2$ plies to break constant depth analysis tracking. - Pondering: Background pre-calculations on your opponent's turn allow for near-instant premoves when the expected line is played.
- 🌌 ZXC / Shadow Fiend Mode — Activating this legendary mode overhauls the interface:
- Visual Theme: Entire UI shifts to a dark-matte neon-red design.
-
Active Avatar: Replaces panel logos and floating orbs with an animated Shadow Fiend GIF (
assets/sf.gif). -
Audio Sync: Upon activation, plays the theme track (
assets/sf.mp3) with active tab visibility auto-play/pause/stop triggers.
- 🔊 Independent Mute Toggles — Easily disable victory sounds, setup greeting voices, or the SF background music.
- ⬡ Instant Board Hints — Draws the best move dynamically on the chessboard using animated dashes and arrows. Zero cooldown—hints update instantly on click.
- 📖 Opening Book — Automatically plays the first 14 half-moves naturally using Lichess Masters Database.
- 📊 Game Statistics — Saves and tracks your offline winrate and total games played.
📐 Click to expand Human Behavior Presets Table
We designed a mathematically calibrated preset system to perfectly emulate human play styles. Adjust these presets directly in the settings panel:
| Profile | Depth | Blunder % | Mouse Speed | Think Variance | Target Audience |
|---|---|---|---|---|---|
| 👶 Beginner | 3 | 12% | 0.7x | 0.8x | Casual/Novice Play |
| 📈 Intermediate | 5 | 5% | 1.0x | 1.0x | Standard Club Level |
| 🎓 Advanced | 8 | 1.5% | 1.3x | 1.3x | Competitive Matchplay |
| ⚔️ Aggressive | 6 | 2% | 1.2x | 0.4x | Fast, tactical and sharp play |
| 🛡️ Positional | 6 | 1% | 0.9x | 1.2x | Deep strategic and slow maneuvering |
| ⚙️ Custom | Manual | Manual | Manual | Manual | Full granular control |
📉 Click to expand ELO Scaling Matrix Table
The ELO slider dynamically adjusts the following core engine parameters in real-time:
| ELO Level | Category | Depth | Mistake Chance | Blunder Chance | Average Thinking Time | Mouse Wobble |
|---|---|---|---|---|---|---|
| 1000 | Beginner | 3 plies | 30% | 8% | ~300ms – 2.0s | Heavy (5px) |
| 1100 | Casual | 4 plies | 25% | 6.5% | ~400ms – 2.4s | Moderate (4.3px) |
| 1200 | Intermediate | 5 plies | 21% | 5.2% | ~450ms – 2.7s | Moderate (3.6px) |
| 1300 | Club Player | 6 plies | 17% | 4% | ~500ms – 3.0s | Light (2.9px) |
| 1400 | Strong Club | 7 plies | 12% | 2.8% | ~550ms – 3.4s | Light (2.2px) |
| 1500 | Advanced | 8 plies | 8% | 1.5% | ~600ms – 3.8s | Smooth (1.5px) |
To help the developer evaluate the active user base and decide whether to continue dedicating time to future updates or archive the project, the extension includes a lightweight, 100% anonymous telemetry system.
- What is tracked: A randomly generated unique client ID (e.g.,
usr_abcdef123) and the date/time of the daily extension launch. - What is NOT tracked: Absolutely no personal data, Chess.com credentials, session cookies, tokens, or game histories are collected.
- How it works: Once a day, when you open Chess.com, the extension sends a single anonymous ping to a secure, private Google Spreadsheet.
- Why this is necessary: This data is used solely as a signal of active interest. It helps the developer understand if there is a real audience using the assistant, determining whether to release future updates or archive the repository.
Since the extension runs locally and is not hosted on the Chrome Web Store, you can easily install it as an unpacked developer extension:
- Download the source: Clone this repository or download the latest zipped bundle from the Releases page.
- Unpack the archive: Extract the files into a dedicated folder on your computer.
- Open Extensions Page: Navigate to
chrome://extensions/in Chromium browsers (orabout:debuggingin Firefox). - Enable Developer Mode: Toggle the Developer mode switch in the top-right corner.
- Load Unpacked: Click the Load unpacked button (or "Load Temporary Add-on") and select the extracted extension folder.
- Start Playing: Open any game on Chess.com and click the floating Knight icon to open the dashboard!
To bypass Chess.com's strict sandboxing and Content Security Policies, Knight uses a modern Manifest V3 multi-layered messaging system:
This project is licensed under the MIT License - see the LICENSE file for details. Stockfish is licensed under the GPLv3.