fix en passant

app/src/main/java/chess/model/ChessBoard.java

@@ -70,6 +70,7 @@ public class ChessBoard {
 		pieceComes(movingPiece, move.getStart());
 		pieceLeaves(move.getFinish());
 		pieceComes(deadPiece, move.getDeadPieceCoords());
+		assert movingPiece != null;
 		movingPiece.unMove();
 	}
 

app/src/main/java/chess/model/Move.java

@@ -30,7 +30,7 @@ public class Move {
 		int diffY = getFinish().getY() - getStart().getY();
 
 		assert Math.abs(diffX) < Coordinate.VALUE_MAX : "Move is too big!";
-		assert Math.abs(diffX) < Coordinate.VALUE_MAX : "Move is too big!";
+		assert Math.abs(diffY) < Coordinate.VALUE_MAX : "Move is too big!";
 
 		if (diffX == 0)
 			return Math.abs(diffY);
@@ -53,4 +53,11 @@ public class Move {
 		return deadPieceCoords;
 	}
 
+	@Override
+	public boolean equals(Object obj) {
+		if (obj instanceof Move other)
+			return this.start.equals(other.start) && this.finish.equals(other.finish);
+		return false;
+	}
+
 }

app/src/main/java/chess/model/visitor/PiecePathChecker.java

@@ -96,7 +96,14 @@ public class PiecePathChecker implements PieceVisitor<Boolean> {
 		if (pieceToEat.getColor() == pawn.getColor())
 			return false;
 
-		if (lastMove.getMiddle().equals(this.move.getFinish())
+		Direction lastMoveDir = Direction.findDirection(lastMove);
+
+		if ((lastMoveDir != Direction.Front && lastMoveDir != Direction.Back) || lastMove.traversedCells() != 2)
+			return false;
+
+		Coordinate middle = lastMove.getMiddle();
+
+		if (middle.equals(this.move.getFinish())
 				&& new PawnIdentifier(pieceToEat.getColor()).isPawn(pieceToEat)) {
 			this.move.setDeadPieceCoords(lastMove.getFinish());
 			return true;