Opens PGN of a game from chess.com or chessgames.com in lichess.org analysis

Latest Version

Version
4.0.4
Update
December 6, 2024
Size
101KiB
Developer
Category
Users
20,000+
Rating
3.87 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
ActiveTab
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Chess.com Analysis at Lichess Extension

This extension has the following features:

* Allows you to view lichess analysis for any finished chess.com game.
* Works from the Game Archive as well as from finished live games
* Also supports chessgames.com, chess-db.com and chesstempo.com

I am not affiliated in any way with lichess or chess.com (but I'm a fan of both).

I'm not playing chess as much right now, so if it's broken, please let me know at [email protected].

Many thanks to all contributors!

Reddit discussion is here: https://redd.it/47cdew

Source code is on Github here: https://goo.gl/rOZqsm

Recent changes:
2024 December 4: Fixed for recent chess.com changes. Now works for World Championship games and other events.
2023 May 24: Fixed for chess.com games against computers.
2022 April 17: Fixed for change to chess.com download button.
2022 March 28: Fixed some problems with the upgrade to manifest v3. Fixed chessgames.com. Fixed for change to chess.com download button.
2022 March 27: Upgraded to Chrome manifest v3 (thanks Russell!)
2022 March 5: Prevented chess.com analysis from being sent to lichess (thanks Russell!)
2021 December 20: Fixed for chess.com games via download button (thanks Pierre-Louis!).
2021 July 29: Fixed for chess.com daily games and events.
2021 February 6: Fixed when launched from the chess.com analysis pages. (thanks Johannes!)
2020 November 18: Fixes for recent chess.com changes. Now works from chess.com analysis pages.
2020 September 19: Fixes for changes to urls on chess.com and chesstempo.com.
2020 September 3: Updated for new url format on chess.com (thanks mhssmnn!).
2019 December 20: Fixed after recent changes to chess.com.
2019 October 8: Fixed after recent changes to chess.com. Now works with games against the computer.
2019 April 16: Support for games from chessgames.com, chess-db.com and chesstempo.com. Improved manifest to limit permissions as much as possible. Icon now becomes enabled only when there is a valid game to analyse. Improved colour of icon so that it is clear when it is available.
2019 April 4: Fixed after live game. Avoided 'the message port closed...' error.
2019 April 3: Fixed after recent changes to Chess.com (thanks 0ddFell0w!) . Support for 'daily' games.
2018 December 8: Fixed after recent changes to Lichess import page.
2018 October 20: Fixed problem which was preventing working after live games.
2017 January 3: Fix to link after finished game. Also works from chess.com live analysis.
2016 November 30: Print-friendly PDF is now a separate Chrome extension (Lichess Print-friendly PDF).
2016 November 25: Print-friendly PDF now uses AWS lambda.
2016 November 14: Added 'Print-friendly PDF export' which has recently been removed from lichess.
2016 July 5: Fixed for recent chess.com changes.
2016 June 29: Fixed game result in lichess PDF export
2016 June 16: Fixed css name clash.
2016 June 16: Fixes for recent chess.com changes. Now works from any live game in v3 (not just your own)!
2016 June 13: Uses https in lichess.org urls.
2016 Mar 30: Improved reliability of computer analysis toggle before uploading to lichess.
2016 Mar 27: Updated to support recent changes to chess.com.

Thanks to Allan Rempel who created a similar plugin for chess.com v2.

Icon CC-BY-SA 3.0, CBurnett (https://en.wikipedia.org/wiki/User:Cburnett)
with adjustments by AntonSusi (https://commons.wikimedia.org/wiki/User:Antonsusi).
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Source Manifest.json

{ "name": "Chess.com Analysis at Lichess", "version": "4.0.4", "manifest_version": 3, "description": "Opens PGN of a game from chess.com or chessgames.com in lichess.org analysis", "homepage_url": "http://www.zerosharp.com", "update_url": "https://clients2.google.com/service/update2/crx", "icons": { "128": "icons/knight128.png", "16": "icons/knight16.png", "256": "icons/knight256.png", "32": "icons/knight32.png", "512": "icons/knight512.png", "64": "icons/knight64.png" }, "default_locale": "en", "background": { "service_worker": "src/bg/background.js", "type": "module" }, "content_scripts": [ { "js": [ "js/jquery-3.5.1.min.js", "src/bg/analysis.js" ], "matches": [ "https://*.lichess.org/paste" ] }, { "css":[ "css/getpgn.css" ], "js": [ "js/jquery-3.5.1.min.js", "src/bg/getpgn.js" ], "matches": [ "https://www.chess.com/live*", "https://www.chess.com/play/computer", "https://www.chess.com/live/game/*", "https://www.chess.com/game/live/*", "https://www.chess.com/analysis/game/live/*", "https://www.chess.com/game/daily/*", "https://www.chess.com/game/computer/*", "https://www.chess.com/events/*/*", "https://www.chess.com/play/online", "https://www.chessgames.com/perl/chessgame*", "https://chessgames.com/perl/chessgame*", "https://chess-db.com/public/game.jsp*", "https://chesstempo.com/gamedb/*/*", "https://old.chesstempo.com/gamedb/*/*", "https://old.chesstempo.com/game-database.html" ] } ], "action": { "default_icon": { "128": "icons/knight128.png", "16": "icons/knight16.png", "256": "icons/knight256.png", "32": "icons/knight32.png", "512": "icons/knight512.png", "64": "icons/knight64.png" } }, "permissions": [ "activeTab" ]}
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How to download and manually install Chess.com Analysis at Lichess extension for Chrome

Looking for a way to install Chess.com Analysis at Lichess extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Chess.com Analysis at Lichess extensions manually, this article outlines two simple methods to effortlessly install Chess.com Analysis at Lichess extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Chess.com Analysis at Lichess extension and manually install through Drag &Drop

If you ever need to manually install a Chess.com Analysis at Lichess extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Chess.com Analysis at Lichess Extension by clicking the "Download CRX" button on the website.

Look for the Chess.com Analysis at Lichess extension you wish to install. Go to the website and download the Chess.com Analysis at Lichess extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Chess.com Analysis at Lichess extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Chess.com Analysis at Lichess extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Chess.com Analysis at Lichess extension for Chrome and install in Developer Mode

This is another method to install Chess.com Analysis at Lichess extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Chess.com Analysis at Lichess extension file

Select and download the Chess.com Analysis at Lichess extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Chess.com Analysis at Lichess extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Chess.com Analysis at Lichess extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Chess.com Analysis at Lichess extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Chess.com Analysis at Lichess extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Mathew Joseph (ID: 000000c902b63918) Voted 5 ★ - Updated 04/08/2023 Great when it's working! Thanks to the developer for making this. Sometimes, it doesn't work after a game. Occasionally if you refresh or click profile and go to the game that way, it will after sometime. I believe it works from both post-game and analysis board.

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myUser (ID: 000000a6151e1ddd) Voted 5 ★ - Updated 03/24/2023 Safari Support? Please and thank you!

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Dominik Stine (ID: 000000390a215f36) Voted 1 ★ - Updated 10/14/2022 There is no night in my URL bar after a game ends. Doesn't work.

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Марк Сивко (ID: 0000003e13b7aca6) Voted 5 ★ - Updated 10/02/2022 Works fast and perfect. Can't thank you enough for this app.

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Kendouci Otmane (ID: 000000b7d0822f2f) Voted 5 ★ - Updated 09/12/2022 Loved it it easy.