Added all other pieces and moved them into a separate package

src/dev/kske/chess/Board.java

@@ -1,6 +1,13 @@
 package dev.kske.chess;
 
-import dev.kske.chess.Piece.Color;
+import dev.kske.chess.piece.Bishop;
+import dev.kske.chess.piece.King;
+import dev.kske.chess.piece.Knight;
+import dev.kske.chess.piece.Pawn;
+import dev.kske.chess.piece.Piece;
+import dev.kske.chess.piece.Piece.Color;
+import dev.kske.chess.piece.Queen;
+import dev.kske.chess.piece.Rook;
 
 /**
  * Project: <strong>Chess</strong><br>
@@ -17,12 +24,41 @@ public class Board {
 		initializeDefaultPositions();
 	}
 
+	/**
+	 * Initialized the board array with the default chess pieces and positions.
+	 */
 	private void initializeDefaultPositions() {
 		// Initialize pawns
 		for (int i = 0; i < 8; i++) {
 			boardArr[i][1]	= new Pawn(Color.BLACK);
 			boardArr[i][6]	= new Pawn(Color.WHITE);
 		}
+
+		// Initialize kings
+		boardArr[4][0]	= new King(Color.BLACK);
+		boardArr[4][7]	= new King(Color.WHITE);
+
+		// Initialize queens
+		boardArr[3][0]	= new Queen(Color.BLACK);
+		boardArr[3][7]	= new Queen(Color.WHITE);
+
+		// Initialize rooks
+		boardArr[0][0]	= new Rook(Color.BLACK);
+		boardArr[0][7]	= new Rook(Color.WHITE);
+		boardArr[7][0]	= new Rook(Color.BLACK);
+		boardArr[7][7]	= new Rook(Color.WHITE);
+
+		// Initialize knights
+		boardArr[1][0]	= new Knight(Color.BLACK);
+		boardArr[1][7]	= new Knight(Color.WHITE);
+		boardArr[6][0]	= new Knight(Color.BLACK);
+		boardArr[6][7]	= new Knight(Color.WHITE);
+
+		// Initialize bishops
+		boardArr[2][0]	= new Bishop(Color.BLACK);
+		boardArr[2][7]	= new Bishop(Color.WHITE);
+		boardArr[5][0]	= new Bishop(Color.BLACK);
+		boardArr[5][7]	= new Bishop(Color.WHITE);
 	}
 
 	/**

src/dev/kske/chess/BoardPanel.java

@@ -13,6 +13,8 @@ import java.util.Map;
 
 import javax.swing.JPanel;
 
+import dev.kske.chess.piece.Piece;
+
 /**
  * Project: <strong>Chess</strong><br>
  * File: <strong>BoardPanel.java</strong><br>

src/dev/kske/chess/piece/Bishop.java

@@ -0,0 +1,17 @@
+package dev.kske.chess.piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Bishop.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class Bishop extends Piece {
+
+	public Bishop(Color color) {
+		super(color);
+	}
+
+	@Override
+	public Type getType() { return Type.BISHOP; }
+}

src/dev/kske/chess/piece/King.java

@@ -0,0 +1,17 @@
+package dev.kske.chess.piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>King.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class King extends Piece {
+
+	public King(Color color) {
+		super(color);
+	}
+
+	@Override
+	public Type getType() { return Type.KING; }
+}

src/dev/kske/chess/piece/Knight.java

@@ -0,0 +1,17 @@
+package dev.kske.chess.piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Knight.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class Knight extends Piece {
+
+	public Knight(Color color) {
+		super(color);
+	}
+
+	@Override
+	public Type getType() { return Type.KNIGHT; }
+}

src/dev/kske/chess/piece/Pawn.java

@@ -1,4 +1,4 @@
-package dev.kske.chess;
+package dev.kske.chess.piece;
 
 /**
  * Project: <strong>Chess</strong><br>

src/dev/kske/chess/piece/Piece.java

@@ -1,4 +1,4 @@
-package dev.kske.chess;
+package dev.kske.chess.piece;
 
 /**
  * Project: <strong>Chess</strong><br>

src/dev/kske/chess/piece/Queen.java

@@ -0,0 +1,17 @@
+package dev.kske.chess.piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Queen.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class Queen extends Piece {
+
+	public Queen(Color color) {
+		super(color);
+	}
+
+	@Override
+	public Type getType() { return Type.QUEEN; }
+}

src/dev/kske/chess/piece/Rook.java

@@ -0,0 +1,17 @@
+package dev.kske.chess.piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Rook.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class Rook extends Piece {
+
+	public Rook(Color color) {
+		super(color);
+	}
+
+	@Override
+	public Type getType() { return Type.ROOK; }
+}