comment3

src/backend/Board.java

@@ -300,9 +300,9 @@ public class Board {
         System.out.println("Choose piece to promote to:");
         System.out.println("Enter Q for Queen, R for Rook, B for Bishop, N for Knight");
 
-        while (true) {
+        while (true) { // as long as user has not responded a correct answer (which would return something) don't go on with rest of code
             String input = scanner.nextLine().trim().toUpperCase();
-            switch (input) {
+            switch (input) {  // Switch function (which we have studied in C++ last year in Embedded Software) is just a faster way to write successive if and else if conditions, default works as the final else{
                 case "Q": return PieceType.Queen;
                 case "R": return PieceType.Rook;
                 case "B": return PieceType.Bishop;
@@ -317,7 +317,7 @@ public class Board {
         // TODO
     }
 
-    public void playMove(Move move) {
+    public void playMove(Move move) { //For AI
         int fromX = move.getFromX();
         int fromY = move.getFromY();
         int toX = move.getToX();
@@ -339,7 +339,7 @@ public class Board {
         System.out.println(toString());
     }
 
-    public Board(Board otherBoard) {
+    public Board(Board otherBoard) {   //FOR AI
         this.width = otherBoard.width;
         this.height = otherBoard.height;
         this.turnNumber = otherBoard.turnNumber;