diff --git a/src/day15/2.rs b/src/day15/2.rs
index 7caef88..e899296 100644
--- a/src/day15/2.rs
+++ b/src/day15/2.rs
@@ -2,9 +2,6 @@
 #![feature(test)]
 extern crate test;
 
-
-use fxhash::FxHashSet;
-
 const INPUTS: [&str; 2] = [
     "##########
 #..O..O.O#
@@ -147,7 +144,6 @@ fn validate_move(grid: &mut Bitmap, walls: &Bitmap, x: i64, y: i64, direction: i
         }
 
         0 | 2 => {
-            let mut seen = FxHashSet::default();
             let mut to_move = vec![];
 
             let starting_point = if grid.get_left(x,y) {
@@ -157,7 +153,6 @@ fn validate_move(grid: &mut Bitmap, walls: &Bitmap, x: i64, y: i64, direction: i
             } else {
                 return false;
             };
-            seen.insert(starting_point);
             to_move.push(starting_point);
 
             let mut last_checked = 0;
@@ -177,11 +172,7 @@ fn validate_move(grid: &mut Bitmap, walls: &Bitmap, x: i64, y: i64, direction: i
                             continue;
                         };
 
-                        if seen.contains(&p) {
-                            continue;
-                        }
                         to_move.push(p);
-                        seen.insert(p);
                     }
                     last_checked = i+1;
                 }
@@ -191,6 +182,9 @@ fn validate_move(grid: &mut Bitmap, walls: &Bitmap, x: i64, y: i64, direction: i
             let mut grida = grid.clone();
 
             while let Some(coord) = to_move.pop() {
+                if coord.iter().all(|x| !grida.get(x.0,x.1)) {
+                    continue;
+                }
                 if coord.iter().any(|x| grida.get(x.0+delta.0, x.1+delta.1) || walls.get(x.0+delta.0, x.1+delta.1)) {
                     return false;
                 }