Java OOP Chess

Chess in Java with Swing. I started with everything in one big GUI.java file and slowly pulled the rules into their own classes so the board UI isn’t doing all the work.

Java 21 and Maven.

Run

mvn compile exec:java

Main class: com.schess.ChessFrame.

Playing

Click your piece — legal squares highlight. Click a highlighted square to move (click the same piece again to cancel). Pawns promote to a queen on the last rank. Captured pieces show above and below the board. New Game starts over. Checkmate and stalemate show in the status bar and the board stops taking moves.

White is at the bottom (ranks 8–1, files a–h).

What works

Standard moves for all pieces, captures, turns, castling both sides, check/checkmate/stalemate, you can’t move into check, king highlight when in check, rank/file labels, legal-move highlights, captured-piece strips.

Not done yet

• En passant
• Underpromotion (promotion is queen only for now)

Might add later: undo, draw rules, timer, etc...

Project layout

src/main/java/com/schess/
  ChessFrame.java          — entry point
  ui/                      — BoardPanel, CapturedPanel, ChessController, icons
  game/                    — Game, Board, MoveValidator, moves, castling
  pieces/                  — Piece types (King, Pawn, …)
src/main/resources/images/ — piece artwork (12 files)