en-passant method for white and black pawns

OOP_2B1_Project/src/backend/Board.java

@@ -15,6 +15,7 @@ public class Board {
 	private int ym;
 	private int turnNumber;
 	private boolean turnColor;
+	private Move lastMove; // new field
 	private ArrayList<ArrayList<Boolean>> possibleMoves = new ArrayList<>();
 	private LinkedList<BoardHistory> boardHistory = new LinkedList<>();
 	
@@ -129,6 +130,13 @@ public class Board {
 			boardHistory.add(new BoardHistory(board,turnNumber,turnColor));
 			Piece pieceToMove = this.board.get(this.ym).get(this.xm);
 			boolean isCastlingMove = pieceToMove.getType() == PieceType.King && Math.abs(x - xm) == 2;
+			
+			if (pieceToMove instanceof Pawn && x != xm && board.get(y).get(x) == null) {
+			    // En passant capture
+			    board.get(ym).set(x, null);
+			}
+
+
 
 			//check for castling mode:
 			if (isCastlingMove) {
@@ -156,6 +164,7 @@ public class Board {
 			board.get(this.ym).set(this.xm,null);
 			this.setPiece(x,y,pieceToMove.getType(),pieceToMove.isWhite());
 			Piece movedPiece = this.getPiece(x, y);
+			lastMove = new Move(xm, ym, x, y);
 			if (movedPiece instanceof Pawn) {
 			    int promotionRow = movedPiece.isWhite() ? 0 : 7;
 			    if (y == promotionRow) {
@@ -215,6 +224,9 @@ public class Board {
 //			System.out.println("a"); // Debug
 			select = false;
 		}
+		
+		possibleMoves = board.get(y).get(x).getPossibleMoves(board, lastMove);//same as kingCheck
+
 	}
 
 	public boolean isSelected(int x, int y) {
@@ -285,6 +297,13 @@ public class Board {
 		boardHistory.add(new BoardHistory(board,turnNumber,turnColor));
 		Piece pieceToMove = this.board.get(ym).get(xm);
 		boolean isCastlingMove = pieceToMove.getType() == PieceType.King && Math.abs(x - xm) == 2;
+		lastMove = new Move(xm, ym, x, y);
+		
+		if (pieceToMove instanceof Pawn && x != xm && board.get(y).get(x) == null) {
+		    // En passant capture
+		    board.get(ym).set(x, null); 
+		}
+
 
 		//check for castling mode:
 		if (isCastlingMove) {

OOP_2B1_Project/src/backend/Move.java

@@ -31,4 +31,9 @@ public class Move {
     public String toString() {
         return "(" + fromX + "," + fromY + ") → (" + toX + "," + toY + ")";
     }
+
+	public Pawn getMovedPiece() {
+		// TODO Auto-generated method stub
+		return null;
+	}
 }