yes

chess/src/chess/Board.java

@@ -14,10 +14,12 @@ import javalib.worldimages.WorldImage;
 class Board {
     Map<Coord, Piece> board;
     Map<Coord, Info> info;
+    Game game;
 
-    Board() {
+    Board(Game game) {
         this.board = new HashMap<Coord, Piece>();
         this.info = new HashMap<Coord, Info>();
+        this.game = game;
     }
 
     WorldScene draw() {
@@ -93,6 +95,7 @@ class Board {
         Piece piece = this.get(targ);
         this.drop(targ);
         this.set(dest, piece);
+        this.game.changeActive();
     }
 
     // Get the valid moves for a piece.

chess/src/chess/Game.java

@@ -18,7 +18,7 @@ class Game extends World {
     }
 
     Game() {
-        this.board = new Board();
+        this.board = new Board(this);
         this.white = new Player(Util.Col.WHITE, this.board);
         this.black = new Player(Util.Col.BLACK, this.board);
         this.activeActor = this.white;
@@ -116,4 +116,9 @@ class Game extends World {
     }
 
     public void onKeyEvent(String key) { this.activeActor.key(key); }
+
+    void changeActive() {
+        if (this.activeActor.equals(this.white)) this.activeActor = this.black;
+        else this.activeActor = this.white;
+    }
 }

chess/src/chess/Player.java

@@ -9,36 +9,50 @@ class Player extends Actor {
     Player(Util.Col col, Board board) { super(col, board); }
 
     void click(Coord coord) {
-        if (this.board.get(coord) == null) {
-            if (this.selected == null) return;
+        Piece piece = this.board.get(coord);
+
+        if (this.selected == null) {
+            if (piece == null) {
+                return;
+            } else {
+                if (piece.col.equals(this.col)) {
+                    System.out.println("clicked piece with nothing selected");
+                    this.selected = coord;
+                    this.board.displaySelected(coord);
+                    this.board.displayMoves(coord);
+                    return;
+                } else {
+                    System.out.println(
+                        "clicked other actor with nothing selected"
+                    );
+                    return;
+                }
+            }
+        } else {
             ArrayList<Coord> moves = this.board.getMoves(this.selected);
             if (moves.contains(coord)) {
+                System.out.println(
+                    "clicked on moveable space with something selected"
+                );
                 this.board.move(this.selected, coord);
+                this.board.unselect(this.selected);
+                this.board.undisplayMoves(moves);
+                this.selected = null;
+                return;
+            } else {
+                System.out.println(
+                    "clicked on bad space with something selected"
+                );
+                this.board.undisplayMoves(moves);
+                this.board.unselect(coord);
+                this.selected = null;
+                return;
             }
-            this.board.unselect(this.selected);
-            this.board.undisplayMoves(moves);
-            this.selected = null;
-            return;
-        };
-
-        // Click while something selected.
-        if (this.selected != null) {
-            ArrayList<Coord> moves = this.board.getMoves(this.selected);
-            // Click on same piece -- unselect.
-            if (this.selected.equals(coord)) {}
-            this.board.unselect(this.selected);
-            this.board.undisplayMoves(moves);
-            this.selected = null;
-            return;
-        } else {
-            this.selected = coord;
-            this.board.displaySelected(this.selected);
-            this.board.displayMoves(this.selected);
-            return;
         }
     }
 
     void key(String key) {
+        if (this.selected == null) return;
         this.board.undisplayMoves(this.board.getMoves(this.selected));
         this.board.unselect(this.selected);
         this.selected = null;