From 23f81af2ed7dd0908d429762a656b1284b037e84 Mon Sep 17 00:00:00 2001
From: spatialfree <mail@ethanmerchant.com>
Date: Fri, 22 Nov 2024 07:15:12 -0500
Subject: [PATCH] prevent backtracking

---
 src/Mono.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Mono.cs b/src/Mono.cs
index 4bdb1fd..313c2f2 100644
--- a/src/Mono.cs
+++ b/src/Mono.cs
@@ -235,6 +235,7 @@ static class Mono
             }
             if (viable_step)
             {
+                tail_fill[min_cell] = -1; // prevent backtracking
                 cell = min_cell;
             }
             // if (min_dist <= 1)