@@ -8,9 +8,9 @@
 {
 	this(in Game g) { solver = new Solver(g); }
 	Solver solver;
 	bool fin;
-	override void on_game_changed(char c, const(Game) g, bool finished)
+	override void on_game_changed(char c, in Game g, bool finished)
 	{
 		fin = finished;
 	}
 }