Chess webapp, with stockfish integration Built for siege week 4 (practice week) on hackclub. All it does is allow you to play chess on a super simple website with either yourself or stockfish. Although, I'm making this so that I can fiddle around with stockfish a bit...

The entire point of this project is to help me in making more interactive websites and give me some experience in how to integrate opensource stuff in them.

• Using keyboard keystrokes to move the pieces/using mouse to move the pieces
  • Will not be done, as the week is nearly over and I have a festival (Dusshera) to attend to

• 23 Sept 2025
  • Created the project
  • Added index.html, style.css, and app.js files and updated base code
  • Made a square chess board along with movable pieces
    • Currently they're just letters, but we'll see if I can design some of them...
  • Added square number/alphabets to the board
    • Will alternate in colours, depending on which colour square they are on
  • Added system for legal moves and showcase it
• 24 Sept 2025
  • Removed all that BS for legal moves, used an external library "chess.js" instead for that cause I aint too good abt it bruh...
    • ;/script>
  • Added an intro screen, and choice picker as to what they'd wanna play as
  • Added promotion screen, so that if the pawn reaches the farthest rank then it can be promoted to either: Queen, Rook, Knight, or Bishop
  • Integrated stockfish functionality
    • Enountered CORS (Cross-Origin Resource Sharing) error when tried to load stockfish as a webworker, apparently browsers block this when running stuff locally...
    • Added a custom chess engine worker stockfish-worker.js
      • it runs in a seperate thread and doesn't block any UI Impliments basic UCI (Universal Chess Interface) commandss
      • Uses chess.js (the external library) to generate ONLY legal moves
    • Main engine interface file: stockfish.js
      • Creates & manages the chessworkerrker
      • Handles the UCI
      • Provides the move requests
    • FEN integration makes it work with any board position
    • Engine also automatically retries to start if "engine not ready" error comes
    • Also added ai toggle, so can only use stockfish for a few moves if wanting to.
• 25 Sept 2025
  • Added king check find out mechanics
    • updateCheckStatus function: It manages the check visual indicators for the king
    • Called after every move from updateBoard
  • findKingSquare(color)
    • Locates the king piece on specific color on the board
    • parameters are either w (white) or b (black)
  • Added css animations for the king square when the king is in check
  • Added move history dialogue
    • Also added a delete history button, dunno where it would be used tho
    • But, there's a noice singular plural form condition I used :p
  • Added so that a warning message pops up when you access via mobile, was pretty easy tbh...
    • I just dont know when it'll be popping up and all, I'm kinda too laxy to test it from my mobile and all
    • Was trying to add a button where if they click that, then they go to the home page of their browser
    • It doesn't really work that well, but eh at least it's there...
  • Added the gyrating feature thing for whatever the piece that's checking the king is
  • Added a feature where if you move a piece, then the previous square and the current square light up a lil, should help with noticing the moves done by the ai cause it's too fast
    • Maybe I should add some delay to the ai? but that'd break the fluidity at times...
• 26 Sept 2025
  • Added a export option for moves
  • Updated comments
  • Added end game dialogue
    • Anarchy chess button
    • OK button, just removes the dialogue
  • Anarchy chess
    • Basically every piece get's a randomised movement pattern, after every move, each piece's movement pattern get's reset.
    • I dont know how this'll work properly, cause I wont test this... Seriously, I dont have the brainpower to do so
    • This should be able to add a easter egg or something to the game ig?
• 27 Sept 2025
  • AI get's disabled when anarchy chess starts, this is because ai isn't really good with "Randomised moves", and I dont wanna code more :')
  • Changed depth in stockfish.js
    • Should make the engine think farther ahead now, make it a little bit more difficult to beat?
    • Although, I didn't find it to become harder in any way...

I probably wont update this again, at least not until there's something new I want to do in this (which, to be fair, is mostly done anywyas) This project was made for Siege week 4, thanks a lot to those guys cause they're single handedly helping me learn javascript..