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  This extension adds a lot of functionalities to your lichess web site. It has so many useful and powerful features! I am very proud of it. The extension is always going to be free, ad-free, donation links free, etc. Yet the only way for it to do what YOU want is feedback. Any feedback! Praise, curses, bug reports, feature requests, use stories, anything. The more you tell me, the more I can improve on this!

  I have also written a different page that will function as a user manual, with all the details on features, preferences and what they mean.

  If you are just interested in the list of features, in reversed chronological order, you might want to check out the history file.

  Join the LiChess Tools user team to get updates as they come, ask for features, give feedback, tell your stories!

  Other stuff:

  • all features have been encapsulated in "tools" in the code
  • all ideas for the future will be rewritten as issues on GitHub, where you can also put feature requests and bug reports
  • A help icon has been added to each of the Preferences to show details on each feature 
  • the extension requires Chrome version 111 or higher

  And now back to our regularly scheduled programming (programming, get it? - also, if you get the whole pun, let me know, you may be a dying breed):

  LiChess Tools (ver. 2.3.78) adds the following features to lichess:

  • play ALL variations in Interactive lesson study chapters!
    • computer is going to play a random move (configurable probability), so you don't need to create a chapter for every small variation
  • PGN editor to merge, normalize, split, count, upload, download, copy PGNs.
  • merge multiple PGNs in analysis import
    • I merged 1000 PGNs with 25000 moves and it worked!
  • automatically open/hide/convert to menu or button the Friends box at page load
    • having the friends box as a menu/button item is really neat
  • sound alert when one of your friends starts playing a game
    • also reading the type of game, so you know if you even want to look at it
    • now there is an option to mute this for individual players in the enhanced friends list
  • ability to randomly play one of the next moves (with configurable probability in comments i.e. prc:66) with Ctrl-Right and go back with Ctrl-Left
  • play against the Opening Explorer (either masters, lichess players or a specific player) in Analysis
  • evaluation of Explorer moves, as well as telling you what move leads to gambits
  • Missed Timeline posts or comments to posts you follow notification
  • screen lock on mobiles while playing (scroll and zoom)
  • find interesting moves and allowing cycling through interesting/good/brilliant moves just like with blunders
  • highlights for the last move of variations (special case for the ones that have no comment and do not end in checkmate) in the analysis/study board
    • you immediately see not only where a variation starts, but also where it ends
  • highlights for the transpositions to the current move in the analysis/study board
    • you won't ever have to worry that you are analyzing the exact same variation but in a different order
    • also you can now show all transposing positions in the PGN
  • new shortcut for playing the next best computer move from Space to Ctrl-Space
    • always annoyed me when I accidentally pressed the key
  • a custom chess engine level
    • if it is idle in a lower state, it runs until it gets to that level
    • this is also used as the required engine level by the study context menu option of commenting all last moves with a computer evaluation
  • custom chess engine options: never use cloud/tablebase, use engine in Practice mode
  • sticky Interactive lesson Preview mode
    • you can now play chapter after chapter without hassle
  • use keyboard shortcuts (i, m, b, Alt-i, Alt-m, Alt-b) for inaccuracies, mistakes and blunders in all variations
    • note that this is a native feature of lichess, but only in your game analyses and only the mainline moves
    • added g and Alt-g to cycle between "positive" moves (good, brilliant and interesting) 
  • show player country flags next to their names
    • if they have their country specified in the profile
    • now you will see flags everywhere. It might break some stuff, so let me know.
  • show the order of circles and arrows in a study/analysis.
    • this is great when you want to understand the order of moves/hints
    • option is off by default
  • a new menu item to open the last viewed TV game
  • show opening names in TV and mini games, as well as Analysis board and Studies
  • many TV options:
    • show history section in player TV (just like for category TV - the two latest games of the player)
    • friends and streamers section in the Current Games tab
    • link and bookmark the current TV game
  • quick button to switch to your player and back in personal opening explorer
  • copy to clipboard branch and continuations from a certain position in analysis/study
    • you can now just pick a variation, copy it in its own chapter, with just a few clicks
    • Shift/Ctrl/Alt change the way this item works
  • available languages: English and Romanian
    • ask for more! I will provide you with the English sentences and the context and you can tell me how it is in your language
  • the options for the extension are in the lichess Preferences section
    • complete integration. The extension popup has no functional role anymore
    • this also means that I will be able to port this to other browsers with minimal effort. Ask if you want this!
  • move options from transpositions to the current position
    • the Extended Interactive Lessons and the Ctrl-Arrow functionalities are also able to choose moves following from this list, as well as the variation arrows
  • automatically evaluate last moves in every variation and store it as a comment
    • the engine level for the evaluation is the same as the custom chess engine level in Preferences 
  • buttons in the study chapter edit form to quickly set the title to the content of the Event or of the White/Black PGN tags
  • set colors/styles to study comments
    • note that these will only be visible to people having the extension installed
  • study chapter navigation controls, including random chapter button (also with keyboard shortcut)
  • auto save and button to reload PGNs in Analysis mode (recover from accidental reloads) 
    • now it automatically copies the last PGN in the PGN box, but you have to manually import it by pressing the button
  • show all transpositions in the analysis/study move list
  • hide the score tally while playing
  • live friends page will update automatically and allow TV view, mute playing alerts and much more
  • global switch to enable/disable extension
  • ability to selectively remove artifacts (comments, shapes, glyphs and PGN tags) from the current study chapter
  • custom chat buttons at beginning and end of play
  • one button delete PGN tags
  • draw arrows and circles on mobile devices (analysis and in-game)
  • extra lines on the game analysis chart and local engine chart in analysis board
  • menu entry to go to last opened Study
  • study options: persist settings, create chapter after current, show chapter PGN as in Analysis
  • move list options: indented variations shows all variations as tree branches, not inline, expanded move list uses all the space available for the analysis move list and hide left side hides the left side of the analysis window for even more space. Open in new window lets you see the move list in another window that you can move to another monitor. You can have the computer evaluation toggle back on the right side.
  • bookmark study moves, which allows for collapse/expand variations, linking to position, highlight in the move list, getting the bookmark URL from a context menu and split the chapter from any bookmark.
  • Option to not see cloud values in computer evaluation
  • Wiki pages will now load in Analysis regardless of move order
  • Variation arrows for transpositions
  • Show pawn structure names in TV games, mini games, Analysis board and Studies
  • Click on Explorer total row to get a random move
  • Toggle between different Explorer lichess tab settings
  • Custom mini-game size
  • Play again from same position you entered Preview mode in
  • Use Stockfish 16 on Brave browser
  • Learn from your mistakes in study chapters
  • Pin studies and broadcasts to home page
  • Community forum
  • Freeze board keyboard shortcut in Analysis/Study
  • Player lag chart next to player names during play
  • Link to download all studies of a user
  • Show profile chart time range dates in a label
  • Outside board coordinates, even in Analysis/Study, and bigger font.
  • Puzzle statistics in Profile
  • Move assistant shows the evaluation of your selected piece legal moves
  • Mirror button in Board Editor
  • More decimals in computer eval
  • auto unselect piece after a few seconds
  • Study flairs
  • Customize lobby page elements
  • Explorer resize
  • Custom sound options (just disable move sounds, keep the rest)
  • Back to current position in correspondence
  • Hide chat during play
  • Broadcast OBS support
  • Hide header shortcut
  • Next move behavior for variations (like Chessbase)
  • /commands! Type /help to get a list

  I couldn't wait to share it with you guys. I will be happy for any feedback, suggestions or help.

  I've started a series of use case blog posts, they might show you how to use the extension in real life:

Here are some screenshots, but they don't really tell you the story. You just have to try it.

More power to Studies

Options are now in the lichess Preferences

A lot of new options for lichess TV

Copy variation PGN directly from move list

Good luck using my extension. I am sure I am going to be tinkering with it a bit. Let me know of any problems you have with it.

Other ideas

For readability sake, I've removed all the old ideas from here and moved all of the new ones as GitHub issues. You can go there and add your own!

Q&A

Q: Can you publish your extension code on GitHub?
A: Yes, I did. I could. Probably I will be starting with version 2, which will be a rewrite of a version 1 that has been in use for a while and that people have given me feedback for. As much as I like sharing my code, I really don't want to have to deal with all the GitHub complications right now.

Q: If your code is not on GitHub, it doesn't exist! Also, I looked at your code and it sucks balls!
A: That's not a question. And I agree. But right now I am focusing on features, not quality control. Wait for V2.

Q: How do we contact you with new ideas, bug reports and general roasting of your coding skills?
A: Use this post. This is my personal blog and my preferred method of communication. On top-right you can see a lot of links to various methods of direct communication with me, although I would prefer thoughtful feedback to remain documented here, as comments. You can now also use the GitHub project.

Q: I am addicted to LiChess Tools and I am afraid later on you will fill it with ads, premium features and EULAs that allow you to remove my kidneys. Can you address my fear?
A: Like everything on this blog, it will always remain free. And not free as in "until someone else buys it" or free as in "watch videos and it's free" or free as in "I will fill your screen with junk", but completely utterly free. Like LiChess, I guess. Also, it doesn't connect to any external services or capture any user data. For now! Muhahahaha! Later on it might need some external services for extra features that you ask for, but I hope it doesn't.

Q: How long did it take you to write this?
A: Mostly a week. Following the 80/20 rule, now I have to work at least one more month to make it good. In the end it probably took two months to start and I am still tinkering, but I can only work on it when I get the time. This has been published since the 10th of May 2023 and I am still adding or fixing or changing things. For the cause!

Q: You should write a tutorial on how to use it. Could you make a video of it?
A: I am not a video person. I hope that this post can convey the basic ways in which to use the extension and that the extension itself can be used without the need of a tutorial. Let's work together to make this clear and easy to use for everyone instead. Also, there is now the user manual page. However, I am not adverse to someone who knows how to make videos to make some about LiChess Tools.

Q: Your Extended Interactive Lesson feature is all I had ever wanted from life! But when I am editing the study, I get the same interface as normal studies. Can you fix it?
A: Some parts of LiChess are easy to change, some not so much. Anything related to rendering is a mess to hook to. Additionally, I wouldn't want to have studies that can only be edited and used with my extension. There is a move context menu that allows setting the "explain why any other move is wrong" now. Also you can collapse the controls now, so they don't bother you at least.

Q: So how do I mark the good branches from the bad variations in Extended Interactive Lessons?
A: Any move that is not in the study will be bad. As for the branches that you want to explore specifically, use the annotations (Mistake, Blunder, Brilliant Move, etc) and comments. You can even explore the bad branches in Preview mode this way and learn why they would be bad.

Q: Can you add features to show me what moves to make while playing?
A: LiChess Tools is not a cheating tool. However I try to add as many tools as possible to help you analyze your games after you've played them.

Q: But can you add some features that don't involve cheating for the games that I am playing/watching?
A: Most of the features of LiChess Tools are analysis oriented because analysis is much better exposed than the game code. Because there are a lot of private variables that are not made accessible, it's difficult to selectively change parts of the game interface and any features would have to brutally copy paste and replace some legitimate code bits. I am afraid that until that changes on LiChess, I will not touch that part, mostly because that means I would have to keep score on what they change on the web site and update my extension accordingly. Also, there are some guidelines that expect one to not change the playing interface at all.

Q: How about changing the way LiChess looks?
A: I am not a good visual designer, nor do I do a lot of work on web frontend. There are some extensions that are doing that (like Prettier Lichess, which I used myself, and perhaps you should ask those people for help instead. Also, I am avoiding as much as possible changes to the visual elements of the website specifically because it might interfere with some such extension or custom CSS tool. BTW, if you are working on something like that and find LiChess Tools is interfering with your stuff, let me know. We can figure things out. In v2.0.14 a new Themes tool has been added. I can publish CSS themes this way, but I don't intend to maintain them myself. If you want to see your theme there, contact me. 

Q: OK, you're my new hero. How can I help?
A: Contact me and let's talk. I despise doing anything UI design related, as evidenced by this blog and the extension popup, so maybe you can help there. Also, not a specialist in browser extensions, so any improvements and/or help with other browsers would be welcome.

Q: Yeah, but I can't code. How can I help?
A: Help me by making this extension known. I don't want "marketing", just spread the word. Let people know and if they like it, they will use it. Can't use it if they don't know about it, though, and I am always afraid people think I am spamming them when I try to advertise my work. Make this famous, is it too much to ask?

Q: I use LiChess in my own language and the new features are jarring in English
A: I've implemented the translation mechanism, but I need the texts for the various languages. If you provide them, I will make them available. Each tool starts with something like 

    intl={
      'en-US':{
        'options.general': 'General',
        'openingNameTitle': 'LiChess Tools - opening name'
      },
      'ro-RO':{
        'options.general': 'General',
        'openingNameTitle': 'LiChess Tools - numele deschiderii'
      }
    }

I plan to integrate Crowdin or something like this, but I don't have the time. You can look in Github and either tell me how to translate to your language or even create a Pull Request.

Q: Chrome sucks! Microsoft sold out! Can you make this work for my favorite browser?
A: Short answer: no. Long answer: I want to help people, so the more the merrier, but I also don't have a lot of resources to maintain code on a browser I don't use. Safari is a mess and extensions on it require to have a tool that only works on Macs and they ask you for money. Firefox has less than 5% of the market and refuses to implement the feature that makes LiChess Tools work. Opera already supports Chrome extensions. To be honest, it is not reasonable for me to bother with anything but Chrome. So long answer is also no :)

A: That's not my bug, it comes from LiChess. They have bugs, too.
Q: How could you possibly have answered before I asked the question?

Q: Did you actually think people were going to read this far down?
A: No.

Q: I told about this to all my friends, I came with feedback and constructive criticism and it feels like you ignored me. What gives?
A: For sure I want to take everything into consideration and act on requests as fast as possible, but it might be that I am caught up with something else. I thoroughly intend to give you and the extension as much attention as possible, so maybe make sure I got your message, first.

Hope it helps!

Comments

Sid

Hello, I use the study tool a lot. I NEVER use the chat room feature in studies. Is there a way to get rid of that chat pane and extend the study chapter list downward? that way i can see all my studies and dont have to scroll in that tiny area. Thanks!

Sid

Niels

Hi, what broke down : the Lichess tools menu dissapeared from preferences, interactive lessons not working any longer (I use only the preview mode). Online friends was there. Strangely, it is back to normal today.

Niels

Siderite

OK, Lichess renamed the lichess object and there were some issues with that :) I hope it all works now in v2.3.21

Siderite

Siderite

What EXACTLY is broken? You can chat with me on Discord or with TotalNoob69 on Lichess chat.

Siderite

Niels

Wonderful, unfortunately latest update 2.3.20 broke everything down. Please help !

Niels

Siderite

Primero actívalo en Preferencias (Mobile device game features), luego, en un dispositivo móvil, obtendrás un botón que parece una flecha diagonal que puedes presionar para luego dibujar flechas.

Siderite

Pou

Ya me funciona, gracias por responder. Solo tengo una pregunta, se menciona que se pueden hacer flechas en dispositivos móviles, pero no veo ninguna opción que me deje hacerlas.

Pou

Siderite

Una vez que hayas instalado la extensión, simplemente funciona. Deberías poder hacer clic en el botón de la extensión para ver cuál es la versión e ir a la página de preferencias de Lichess para configurarla en la sección de LiChess Tools.

Siderite

Pou

Como se activa la extensión? Ya tengo la extensión descargada.

Pou

Siderite

I take that back! I found the issue. Stockfish has a parameter called UCI_Elo which by default, for unfathomable reasons, is 1320. Now it should work fine in v.2.3.18.

Siderite

Siderite

Sorry, but I don't use the same SF version. I can't use the one configured locally because that's used by Lichess, so I use another. I noticed that the results are different in some situations, but I can't really solve it. Will try to investigate a solution, but don't get your hopes up.

Siderite

Xyz

Thanks for adding Move Assistans, but it must to be fix. First of all its better to correlated with the stockfish (example if I put Ng3 in green square the stockfish has show the mistake).

Xyz

Xyz

hello. Can you add these plugin/new tool like that: https://www.youtube.com/watch?v=bqenbfrz5Is . I mean add to lichess assist analise, when you click in piece the squares are colorised and green is a good move, red is a blunder, blue is a inactive and yellow mistake? Its would be TOP1 to improvment this tool

Xyz

Xim

You saved me! My study chapter was initially prepared by my coach, that's why I even didn't have a look into its settings.

Xim

Siderite

Sure you can. When you create a study chapter you specify the orientation. If you choose Black, you play as Black.

Siderite

Xim

Hi there, thank you for a really cool tool! I guess I’m not the first one who asks a question about playing black in Extended interactive lessons. Sorry, I haven't found an answer by this time. Lessons are great, and there is no problem when you need to memorize how to play lines for white as computer always plays black, but I can’t find how to switch the color so as to make engine play for white. Is it possible?

Xim

Siderite

In the Kamran Shirazi study in particular, if you make any move that Kamran did not make in those 2000 games in your current position, you will have to retry, but if you make one the same moves, you can continue. You can see at any point how many moves you can make from one position by click on "Get a hint" or even "View the solution", which will show an arrow for every available move. (Note that View the solution affects the final score, which is also a LiChess Tools feature)

Siderite

Siderite

Hi! "play all variations" means that when you use an Interactive Lesson, which normally (Lichess default) would consider every move on the mainline correct and other moves incorrect, now (with LiChess Tools) it considers all moves in the list correct and those not in the list incorrect. One PGN, many variations, all playable. In the case of the study, for example, it was generating by merging 2000 games of Kamran's in a single PGN. Let's simplify it a little. Let's say that I create one PGN out of only two games and create an Interactive Lesson. One game starts with e4, the other with d4. Without LiChess Tools, when you play the lesson, you will make the move d4 and it will say "Retry" because it is a move, but it is not the mainline. With LiChess Tools and Extended Interactive Lesson enabled, you can play d4 and it will say "Good move" and continue. Same for e4. If you try to move c4, both situations you will get a "Retry". Is it clear now?

Siderite

njugush

in your study play the van't like kanram i'm only able to play only one game, it doesnt show me any games,what i'm i missing?

njugush

Utsa

Is it possible to make a live gaming percentage Shower just like in analyze board when engine is turned on

Utsa

Utsa

Yes a bit awkward as for other it show cls:cyan text

Utsa

Siderite

1. it makes sense, since the colors are added by the extension, to need it to see the colors 2. that's a bit unethical, isn't it?

Siderite

Utsa

The study text colour only work for us Anybody else cannot see the color Also is there any extension which show live game winning percentage

Utsa

Utsa

While ur in the game in normal lichess U should make the game screen like that In lichess tool lichess when u r in game the game screen like awkward and we had to zoom out in start of game I mean just make the screen like normal lichess and add the pen beside hamburger

Utsa

Utsa

U should remove the zoom while u r in game and make it normal just like normal lichess

Utsa

Utsa

Actually my original account got hacked So I play in my 2nd account in private mode But i did that it still shoe you can use extension in incognito or guest window

Utsa

Siderite

Ah, that's a browser thing. You have to - install LiChess Tools (in normal mode) - go to the hamburger menu of the browser (three vertical dots) - select Extensions - go to LiChess Tools and choose Details - scroll down to enable the toggle for incognito mode Then you can enter incognito mode and play - when you open lichess.org, you go to Preferences - select LiChess Tools - set the option I sent you before to Yes, so that it saves your Preferences on the server. Otherwise every time you start your browser the options for LiChess Tools will be the default ones Why are you using Lichess in incognito mode, though? You're the second person I've met doing that.

Siderite

Utsa

It show you can not add extension to incognito mode or guest window help plz How to enable that option

Utsa

Siderite

Did you enable "Also save options for browser private/incognito mode" in Preferences?

Siderite

Utsa

It does not work on private mod I use private mod of kiwi plz help me

Utsa

Siderite

You first have to enable it from Lichess Preferences (see Mobile features). Then you have a button like a pen that you touch and that allows you to draw arrows.

Siderite

Arya

How to do draw arrow in mobile It showing cls:yellow

Arya

Siderite

Note that recently I found the percentage a bit dangerous, as you can play and get 90% the most played variation, which means you undertrain the 10% variation. Use with care.

Siderite

Siderite

Thanks a lot, but the probability is already there :) it already computes it based on how many branches follow in 8 ply, but you can specify probability as a comment with prc:number where the number is 1-100

Siderite

Sucre

I love you more than I love my parents. I was looking for chess analysis sites that played random moves instead of always one set move like puzzles. Even considered rewriting the lichess code myself from their github after I couldn't find a site for my needs. This extension is the perfect alternative. Going to modify this extension a bit to allow people to adjust the probability of the computer playing a certain move so that it rarely plays more niche side-lines. Thank you for doing god's work even though he doesn't exist.

Sucre

Siderite

Thanks, man! I am 80% done with the rewrite...

Siderite

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