@@ -707,9 +707,25 @@
 		return "";
 	}
 }
 
+class Switcher
+{
+	this(in Game g)
+	{
+		if(g.map.W*g.map.H <= 1600)
+			sub_solver = new 侵掠如火!(徐如林)(g);
+		else
+			sub_solver = new 侵掠如火!(疾如風)(g);
+	}
+	char single_step() { return sub_solver.single_step(); }
+	void force(char c) { return sub_solver.force(c); }
+
+	private Solver sub_solver;
+}
+
+alias Switcher MainSolver;
 //alias 侵掠如火!(疾如風) MainSolver;
 //alias 侵掠如火!(徐如林) MainSolver;
-alias 疾如風 MainSolver;
+//alias 疾如風 MainSolver;
 //alias 徐如林 MainSolver;
 //alias 不動如山 MainSolver;