LiChess Tools, by Siderite EN

This extension adds a lot of extra functionality to the https://lichess.org web site.

Main features:

• Extended Interactive Lessons allow you to play ALL variations
• Explorer Practice allows you to play against the moves in Opening Explorer, essentially helping you train against any rating bracket on the Internet or a specific opponent
• local computer analysis chart when no server one exists, even when not logged in
• Enhanced PGN Import in Analysis board allows you to merge multiple PGNs into a single one (lichess limitations strip down the comments, but I am working on a solution). This helps you quickly collect a player's repertoire and maybe save it as a study Interactive Lesson, simulating their play. Then you can export the current analysis moves into separate lines as well, or just copy a single branch as a PGN.
• See evaluation of possible moves of the selected piece in analysis
• Automatic detection of interesting/brilliant/good/best moves
• a PGN editor supporting a lot of operations and accepting tens of megabytes of text
• Mobile device features (for browsers that support extensions on mobile, like Kiwi), including drawing arrows and circles on mobile, scroll/zoom lock while playing, etc.
• Change the friends box into a menu or a button, live update Friends page,
• Sound and voice notifications where players you follow start playing (with mutable option per player)
• TV enhancements: Current games section for players you follow and streamers, menu to go to previously opened games, previous two games in player TV just like in category TV
• Ctrl-right/left to play a random move from the available ones in the list. This also works for moves coming from transposing positions
• Extra context menus for Analysis/Study move list. One allows you to copy the current branch as a PGN. Another will use add comments with the computer evaluation to the terminating moves in all branches
• Show player country flags and game opening names
• Custom chat buttons when playing

There are many more. Here is a comprehensive list, in the order of implementation:

• randomly play one of the next moves with Ctrl-RightArrow
  • configurable probability to play a move by putting prc:<number> in the move comment, where number is a percentage between 1 and 100
• highlights for the last move of variations in the analysis/study board
  • also showing which of the last moves that have not ended in mate have no comment
• highlights the transpositions to the current move in the analysis/study board
  • also an option to show all transpositions in the PGN
• play multiple variations in Interactive lesson mode in the same chapter! (using the prc: notations if present)
• automatically open/hide/convert to menu the Friends box at page load
• sound alert when one of your friends starts playing a game (for various time controls)
• changing the shortcut for playing the next best computer move from Space to Ctrl-Space
• a minimum chess engine level (if it is idle in a lower state, it runs until it gets to that level)
• sticky Interactive lesson Preview mode (remains in Preview when switching between chapters)
• use keyboard shortcuts (i, m, b, Alt-i, Alt-m, Alt-b) for inaccuracies, mistakes and blunders in analysis
• show player country flags next to their names (if they have their country specified in the profile)
• import multiple PGNs in analysis mode and merge them into one
• show the order of arrows and circles in analysis/study
• add an item in the Watch menu to go to last watched game (and from there to the previously watched game and so on)
• show opening name in TV game and mini games
• opening explorer button to quickly switch between you and the selected user
• show history section (last two games) for user TV
• copy branches from analysis/study to clipboard
• TV games have a link to the game in the title and can be bookmarked during the game
• languages supported: English, Romanian
• extension options in the Preferences menu in LiChess
• next moves from transpositions are now available in the analysis move list
• study move list context menu item to automatically go to the last move of every variation and add a comment with the computer evaluation
• option to save preferences in incognito mode, too (you have to set it from Preferences first!)
• buttons to change chapter names from the Event or Black/White PGN tags in the chapter edit form
• custom styles for study comments
• study chapter navigation controls (including random chapter)
• auto save and button to reload PGNs in Analysis mode (recover from accidental reloads)
• enhanced Friends list now shows live online status and TV links, plus allows the option to "mute" playing alerts for each player
• hide score tally crosstable during play
• select move from variations, computer list or explorer by pressing . (dot), Ctrl-. and Shift-. respectively, then a digit key
• global enable/disable extension switch
• for the currently selected chapter, the ability to selectively remove just the comments, glyphs or drawn shapes
• mobile device settings (use Kiwi browser on mobiles, it allows extensions)
• custom user CSS themes (you can create PRs for them or ask me to include them, but you are maintaining them!)
• delete all PGN tags in bulk or pick individual ones from the current chapter
• practice with Explorer (computer makes moves based on what masters, lichess or a specific player played in that position)
• additional glyphs on…