Index: src/output.d
==================================================================
--- src/output.d
+++ src/output.d
@@ -23,25 +23,30 @@
 {
 	this(in Game g)
 	{
 		setup_sigint_handling();
 		ideal_log ~= g.score_if_abort_now;
+		flushed = false;
 	}
 
 	override void on_game_changed(char c, in Game g, bool finished)
 	{
+		if(flushed)
+			return;
+
 		log ~= c;
 		score_log ~= g.score;
 		ideal_log ~= g.score_if_abort_now;
-		if(finished)
+		if(finished || log.length+1==g.map.W*g.map.H)
 			flush();
 	}
 
 private:
 	string log;
 	long[] score_log;
 	long[] ideal_log;
+	bool   flushed;
 
 	void flush()
 	{
 		Tuple!(long, int, int) cand;
 		cand[0] = long.min;
@@ -59,10 +64,11 @@
 		} else {
 			string str = log[0..cand[1]];
 			std.c.stdio.printf("%.*sA\n", str.length, str.ptr);
 		}
 		std.c.stdio.fflush(std.c.stdio.stdout);
+		flushed = true;
 	}
 
 private:
 	static __gshared GuardedOutput g_output;