What is Chess.com Analysis at Lichess?

Chess.com Analysis at Lichess is a Chrome extension developed by Robert Anderson, and its main feature is "Opens PGN of a game from chess.com or chessgames.com in lichess.org analysis".

Extension Screenshots

Download Chess.com Analysis at Lichess Extension CRX File

Download Chess.com Analysis at Lichess extension files in crx format, manually install Chrome extensions in the browser, or share the crx files with friends to easily install Chrome extensions.

Extension Usage Instructions

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:
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).

Extension Basic Information

Name	Chess.com Analysis at Lichess
ID	bhjlkimpkkgkmfjlcfngmakenalgleap
Official URL	https://chromewebstore.google.com/detail/chesscom-analysis-at-lich/bhjlkimpkkgkmfjlcfngmakenalgleap
Description	Opens PGN of a game from chess.com or chessgames.com in lichess.org analysis
File Size	98.77 KB
Installation Count	10,000
Current Version	4.0.3
Last Updated	2023-05-30
Publish Date	2019-12-20
Rating	3.83/5 Total 84 Ratings
Developer	Robert Anderson
Email	[email protected]
Payment Type	free
Help Page URL	http://www.zerosharp.com
Supported Languages	en
manifest.json
{ "name": "Chess.com Analysis at Lichess", "version": "4.0.3", "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" ] }