diff --git a/2023/Cargo.lock b/2023/Cargo.lock
index f265292..18bf40c 100644
--- a/2023/Cargo.lock
+++ b/2023/Cargo.lock
@@ -140,6 +140,7 @@ dependencies = [
  "log",
  "nom",
  "test-log",
+ "thiserror",
 ]
 
 [[package]]
@@ -246,9 +247,12 @@ dependencies = [
 name = "day-2"
 version = "2023.0.0"
 dependencies = [
+ "error-stack",
  "itertools 0.12.0",
  "log",
  "nom",
+ "test-log",
+ "thiserror",
 ]
 
 [[package]]
@@ -384,7 +388,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "semver",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
@@ -507,7 +511,7 @@ checksum = "53b153fd91e4b0147f4aced87be237c98248656bb01050b96bf3ee89220a8ddb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
@@ -895,18 +899,18 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "907a61bd0f64c2f29cd1cf1dc34d05176426a3f504a78010f08416ddb7b13708"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -1050,7 +1054,7 @@ dependencies = [
  "regex",
  "relative-path",
  "rustc_version",
- "syn 2.0.39",
+ "syn 2.0.47",
  "unicode-ident",
 ]
 
@@ -1063,7 +1067,7 @@ dependencies = [
  "quote",
  "rand",
  "rustc_version",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
@@ -1141,7 +1145,7 @@ checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
@@ -1183,9 +1187,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "1726efe18f42ae774cc644f330953a5e7b3c3003d3edcecf18850fe9d4dd9afb"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1220,27 +1224,27 @@ checksum = "7ba277e77219e9eea169e8508942db1bf5d8a41ff2db9b20aab5a5aadc9fa25d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
 name = "thiserror"
-version = "1.0.51"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f11c217e1416d6f036b870f14e0413d480dbf28edbee1f877abaf0206af43bb7"
+checksum = "d54378c645627613241d077a3a79db965db602882668f9136ac42af9ecb730ad"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.51"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01742297787513b79cf8e29d1056ede1313e2420b7b3b15d0a768b4921f549df"
+checksum = "fa0faa943b50f3db30a20aa7e265dbc66076993efed8463e8de414e5d06d3471"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
 
 [[package]]
@@ -1341,5 +1345,5 @@ checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.47",
 ]
diff --git a/2023/Cargo.toml b/2023/Cargo.toml
index 2abab2b..99d8b8e 100644
--- a/2023/Cargo.toml
+++ b/2023/Cargo.toml
@@ -25,6 +25,7 @@ num-traits = "0.2.17"
 rustworkx-core = "0.13.2"
 pathfinding = "4.8.0"
 test-log = {version="0.2.14", features=["default", "unstable"]}
+thiserror = "1.0.56"
 
 
 [profile.dhat]
diff --git a/2023/day-1/Cargo.toml b/2023/day-1/Cargo.toml
index 7ca8ea0..4c5fc8e 100644
--- a/2023/day-1/Cargo.toml
+++ b/2023/day-1/Cargo.toml
@@ -14,6 +14,7 @@ error-stack.workspace = true
 itertools.workspace = true
 log.workspace = true
 nom.workspace = true
+thiserror.workspace = true
 
 [dev-dependencies]
 test-log = {workspace=true}
diff --git a/2023/day-1/src/main.rs b/2023/day-1/src/main.rs
index e4db865..3e02b2c 100644
--- a/2023/day-1/src/main.rs
+++ b/2023/day-1/src/main.rs
@@ -3,10 +3,22 @@
 use day_1::part1::part1;
 use day_1::part2::part2;
 
-fn main() {
-    let input = include_str!("./input.txt");
-    let part1_result = part1(input).unwrap();
-    println!("part 1: {part1_result}");
-    let part2_result = part2(input).unwrap();
-    println!("part 2: {part2_result}");
+use error_stack::{Result, ResultExt};
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+enum Day1Error {
+    #[error("Part 1 failed")]
+    Part1Error,
+    #[error("Part 2 failed")]
+    Part2Error,
+}
+
+fn main() -> Result<(), Day1Error> {
+    let input = include_str!("./input.txt");
+    let part1_result = part1(input).change_context(Day1Error::Part1Error)?;
+    println!("part 1: {part1_result}");
+    let part2_result = part2(input).change_context(Day1Error::Part2Error)?;
+    println!("part 2: {part2_result}");
+    Ok(())
 }
diff --git a/2023/day-1/src/part1.rs b/2023/day-1/src/part1.rs
index bd3bc56..0840369 100644
--- a/2023/day-1/src/part1.rs
+++ b/2023/day-1/src/part1.rs
@@ -1,7 +1,5 @@
 #![warn(clippy::all, clippy::pedantic)]
 
-use std::fmt::Display;
-
 use log::trace;
 use nom::{
     self,
@@ -9,17 +7,15 @@ use nom::{
     multi::separated_list1,
 };
 
-use error_stack::{Context, Report, Result, ResultExt};
+use error_stack::{Report, Result, ResultExt};
+use thiserror::Error;
 
-#[derive(Debug)]
-pub struct Day1Part1Error;
-
-impl Context for Day1Part1Error {}
-
-impl Display for Day1Part1Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "day 1 part 1 error")
-    }
+#[derive(Debug, Error)]
+pub enum Day1Part1Error {
+    #[error("Problem parsing Day 1")]
+    ParseError,
+    #[error("Day 1 Input parsed to Empty")]
+    EmptyInput,
 }
 
 /// Day-1 part 1 of AC2023
@@ -32,21 +28,16 @@ impl Display for Day1Part1Error {
 pub fn part1(input: &str) -> Result<String, Day1Part1Error> {
     let (_input, values) = parse_input(input)
         .map_err(|x| Report::from(x.to_owned()))
-        .change_context(Day1Part1Error)?;
+        .change_context(Day1Part1Error::ParseError)?;
     trace!("{values:?}");
     values
         .iter()
         .map(|v| {
             v.first()
                 .and_then(|first| v.last().map(|last| *first * 10 + *last))
-                .ok_or(Day1Part1Error)
-        })
-        .try_fold(0_u32, |sum, number| {
-            let Ok(number) = number else {
-                return Err(Report::from(Day1Part1Error));
-            };
-            Ok(sum + number)
+                .ok_or(Day1Part1Error::EmptyInput)
         })
+        .try_fold(0_u32, |sum, number| Ok(sum + number?))
         .map(|x| x.to_string())
 }
 
diff --git a/2023/day-1/src/part2.rs b/2023/day-1/src/part2.rs
index 1fcb81f..3bef3bc 100644
--- a/2023/day-1/src/part2.rs
+++ b/2023/day-1/src/part2.rs
@@ -1,19 +1,17 @@
 #![warn(clippy::all, clippy::pedantic)]
 
-use std::{fmt::Display, ops::Not};
+use std::ops::Not;
 
-use error_stack::{Context, Report, Result};
+use error_stack::{report, Result};
 use log::trace;
+use thiserror::Error;
 
-#[derive(Debug)]
-pub struct Day1Part2Error;
-
-impl Context for Day1Part2Error {}
-
-impl Display for Day1Part2Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "day 1 part 2 error")
-    }
+#[derive(Debug, Error)]
+pub enum Day1Part2Error {
+    #[error("Problem parsing Day-1 Part2")]
+    ParseError,
+    #[error("Day 1 Input parsed to Empty")]
+    EmptyInput,
 }
 
 /// Day 1 Part 2 of AOC2023
@@ -34,14 +32,9 @@ pub fn part2(input: &str) -> Result<String, Day1Part2Error> {
         .map(|v| {
             v.first()
                 .and_then(|first| v.last().map(|last| *first * 10 + *last))
-                .ok_or(Day1Part2Error)
-        })
-        .try_fold(0_u32, |sum, number| {
-            let Ok(number) = number else {
-                return Err(Report::from(Day1Part2Error));
-            };
-            Ok(sum + number)
+                .ok_or(report!(Day1Part2Error::EmptyInput))
         })
+        .try_fold(0_u32, |sum, number| Ok(sum + number?))
         .map(|x| x.to_string())
 }
 
@@ -80,7 +73,7 @@ fn parse_line(line: &str) -> Result<Vec<u32>, Day1Part2Error> {
         .is_empty()
         .not()
         .then_some(numbers)
-        .ok_or(Report::from(Day1Part2Error))
+        .ok_or(report!(Day1Part2Error::ParseError))
 }
 
 #[cfg(test)]
diff --git a/2023/day-2/Cargo.toml b/2023/day-2/Cargo.toml
index ed23618..199f72e 100644
--- a/2023/day-2/Cargo.toml
+++ b/2023/day-2/Cargo.toml
@@ -11,3 +11,8 @@ repository.workspace = true
 nom.workspace = true
 itertools.workspace = true
 log.workspace = true
+error-stack.workspace = true
+thiserror.workspace = true
+
+[dev-dependencies]
+test-log.workspace = true
diff --git a/2023/day-2/src/main.rs b/2023/day-2/src/main.rs
index 5950776..0075c8d 100644
--- a/2023/day-2/src/main.rs
+++ b/2023/day-2/src/main.rs
@@ -3,10 +3,22 @@
 use day_2::part1;
 use day_2::part2;
 
-fn main() {
-    let input = include_str!("./input.txt");
-    let part1_result = part1(input);
-    println!("part 1: {part1_result}");
-    let part2_result = part2(input);
-    println!("part 2: {part2_result}");
+use error_stack::{Result, ResultExt};
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+enum Day2Error {
+    #[error("Part 1 failed")]
+    Part1Error,
+    #[error("Part 2 failed")]
+    Part2Error,
+}
+
+fn main() -> Result<(), Day2Error> {
+    let input = include_str!("./input.txt");
+    let part1_result = part1(input).change_context(Day2Error::Part1Error)?;
+    println!("part 1: {part1_result}");
+    let part2_result = part2(input).change_context(Day2Error::Part2Error)?;
+    println!("part 2: {part2_result}");
+    Ok(())
 }
diff --git a/2023/day-2/src/part1.rs b/2023/day-2/src/part1.rs
index 7fd9088..c9b87b8 100644
--- a/2023/day-2/src/part1.rs
+++ b/2023/day-2/src/part1.rs
@@ -1,5 +1,6 @@
 #![warn(clippy::all, clippy::pedantic)]
 
+use error_stack::{Report, Result, ResultExt};
 use log::debug;
 use nom::{
     bytes::complete::tag,
@@ -7,6 +8,13 @@ use nom::{
     multi::separated_list1,
     sequence::{preceded, separated_pair},
 };
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Day2Part1Error {
+    #[error("there was a problem parsing")]
+    ParseError,
+}
 
 #[derive(Debug)]
 struct Round {
@@ -23,8 +31,7 @@ struct Game {
 
 impl Game {
     fn to_part1(&self) -> Option<u32> {
-        if self
-            .rounds
+        self.rounds
             .iter()
             .find_map(|r| {
                 //TODO if inverted use find_map
@@ -34,12 +41,8 @@ impl Game {
                     None
                 }
             })
-            .is_some()
-        {
-            None
-        } else {
-            Some(self.id)
-        }
+            .is_none()
+            .then_some(self.id)
     }
 }
 
@@ -48,16 +51,18 @@ impl Game {
 /// # Arguments
 /// - input the puszzle input
 ///
-/// # Panics
-/// panics whenever the input isn't parsable
-pub fn part1(input: &str) -> String {
-    let (_, games) = process_input(input).expect("there should be input");
+/// # Errors
+/// errors whenever the input isn't parsable
+pub fn part1(input: &'static str) -> Result<String, Day2Part1Error> {
+    let (_, games) = process_input(input)
+        .map_err(|err| Report::from(err.to_owned()))
+        .change_context(Day2Part1Error::ParseError)?;
     debug!("{games:?}");
-    games
+    Ok(games
         .iter()
         .filter_map(Game::to_part1)
         .sum::<u32>()
-        .to_string()
+        .to_string())
 }
 
 fn process_block(input: &str) -> nom::IResult<&str, (u32, String)> {
@@ -107,9 +112,10 @@ Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
 Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
 Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green";
 
-    #[test]
+    #[test_log::test]
+    #[test_log(default_log_filter = "trace")]
     fn part1_works() {
-        let result = part1(INPUT);
+        let result = part1(INPUT).unwrap();
         assert_eq!(result, "8".to_string());
     }
 }
diff --git a/2023/day-2/src/part2.rs b/2023/day-2/src/part2.rs
index ea4a794..a6cbe15 100644
--- a/2023/day-2/src/part2.rs
+++ b/2023/day-2/src/part2.rs
@@ -1,11 +1,19 @@
 #![warn(clippy::all, clippy::pedantic)]
 
+use error_stack::{Report, Result, ResultExt};
 use nom::{
     bytes::complete::tag,
     character::complete::{self, newline},
     multi::separated_list1,
     sequence::{preceded, separated_pair},
 };
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Day2Part2Error {
+    #[error("there was a problem parsing")]
+    ParseError,
+}
 
 #[derive(Debug)]
 struct Round {
@@ -44,11 +52,13 @@ impl Game {
 /// # Arguments
 /// - input the puszzle input
 ///
-/// # Panics
-/// panics whenever the input isn't parsable
-pub fn part2(input: &str) -> String {
-    let (_, games) = process_input(input).expect("there should be input");
-    games.iter().map(Game::to_power).sum::<u64>().to_string()
+/// # Errors
+/// errors whenever the input isn't parsable
+pub fn part2(input: &str) -> Result<String, Day2Part2Error> {
+    let (_, games) = process_input(input)
+        .map_err(|err| Report::from(err.to_owned()))
+        .change_context(Day2Part2Error::ParseError)?; //expect("there should be input");
+    Ok(games.iter().map(Game::to_power).sum::<u64>().to_string())
 }
 
 fn process_block(input: &str) -> nom::IResult<&str, (u32, String)> {
@@ -98,9 +108,10 @@ Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
 Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
 Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green";
 
-    #[test]
+    #[test_log::test]
+    #[test_log(default_log_filter = "trace")]
     fn part2_works() {
-        let result = part2(INPUT);
+        let result = part2(INPUT).unwrap();
         assert_eq!(result, "2286".to_string());
     }
 }