diff --git a/2022-aoc/src/d10.rs b/2022-aoc/src/d10.rs
index c9c2b8d..c27ee00 100644
--- a/2022-aoc/src/d10.rs
+++ b/2022-aoc/src/d10.rs
@@ -110,13 +110,13 @@ fn part1(input: &Vm) -> i32 {
 #[aoc_run(day10, part2)]
 fn part2(input: &Vm) -> String {
     let mut vm = input.clone();
-    let mut crt = vec![vec![' '; 40]; 6];
+    let mut crt = vec![vec!['.'; 40]; 6];
 
     for _ in 0..240 {
         let (cycle, x) = vm.run();
+        let x = (x - 1)..=(x + 1);
         let (row, col) = cycle2beam(cycle);
-        let diff = (x.abs() - col as i32).abs();
-        if diff < 2 {
+        if x.contains(&(col as i32)) {
             crt[row][col] = '#';
         }
     }
@@ -299,9 +299,164 @@ noop";
 ####....####....####....####....####....
 #####.....#####.....#####.....#####.....
 ######......######......######......####
-#######.......#######.......#######.....";
+#######.......#######.......#######.....
+";
         let out = part2(&vm);
         println!("{}", &out);
-        assert_eq!(&out.trim(), &expected.trim());
+        assert_eq!(&out, &expected);
+    }
+
+    #[test]
+    fn p2_alt_test() {
+        let input = "noop
+addx 10
+addx -4
+addx -1
+noop
+noop
+addx 5
+addx -12
+addx 17
+noop
+addx 1
+addx 2
+noop
+addx 3
+addx 2
+noop
+noop
+addx 7
+addx 3
+noop
+addx 2
+noop
+noop
+addx 1
+addx -38
+addx 5
+addx 2
+addx 3
+addx -2
+addx 2
+addx 5
+addx 2
+addx -4
+addx 26
+addx -19
+addx 2
+addx 5
+addx -2
+addx 7
+addx -2
+addx 5
+addx 2
+addx 4
+addx -17
+addx -23
+addx 1
+addx 5
+addx 3
+noop
+addx 2
+addx 24
+addx 4
+addx -23
+noop
+addx 5
+addx -1
+addx 6
+noop
+addx -2
+noop
+noop
+noop
+addx 7
+addx 1
+addx 4
+noop
+noop
+noop
+noop
+addx -37
+addx 5
+addx 2
+addx 1
+noop
+addx 4
+addx -2
+addx -4
+addx 9
+addx 7
+noop
+noop
+addx 2
+addx 3
+addx -2
+noop
+addx -12
+addx 17
+noop
+addx 3
+addx 2
+addx -3
+addx -30
+addx 3
+noop
+addx 2
+addx 3
+addx -2
+addx 2
+addx 5
+addx 2
+addx 11
+addx -6
+noop
+addx 2
+addx -19
+addx 20
+addx -7
+addx 14
+addx 8
+addx -7
+addx 2
+addx -26
+addx -7
+noop
+noop
+addx 5
+addx -2
+addx 5
+addx 15
+addx -13
+addx 5
+noop
+noop
+addx 1
+addx 4
+addx 3
+addx -2
+addx 4
+addx 1
+noop
+addx 2
+noop
+addx 3
+addx 2
+noop
+noop
+noop
+noop
+noop";
+        let mut vm = parse_input(input);
+        let out = part2(&vm);
+        let expected = "
+###...##...##..####.#..#.#....#..#.####.
+#..#.#..#.#..#.#....#.#..#....#..#.#....
+###..#..#.#....###..##...#....####.###..
+#..#.####.#....#....#.#..#....#..#.#....
+#..#.#..#.#..#.#....#.#..#....#..#.#....
+###..#..#..##..####.#..#.####.#..#.#....
+";
+        assert_eq!(out, expected);
     }
 }