diff --git a/src/bin/solve/simple.rs b/src/bin/solve/simple.rs
index 7b1c2aa..2b3d28f 100644
--- a/src/bin/solve/simple.rs
+++ b/src/bin/solve/simple.rs
@@ -1,14 +1,12 @@
 #![warn(clippy::all)]
 // #![warn(missing_docs)]
 #![warn(missing_debug_implementations)]
-use std::io::Write;
 
 use clap::Parser;
 use libpt::log::*;
-use wordle_analyzer::error::GameError;
+
 use wordle_analyzer::game::response::GuessResponse;
 
-use wordle_analyzer::game::Game;
 use wordle_analyzer::solve::{stupid, BuiltinSolvers, Solver};
 use wordle_analyzer::wlist::builtin::BuiltinWList;
 use wordle_analyzer::wlist::word::Word;
@@ -49,17 +47,15 @@ fn main() -> anyhow::Result<()> {
         .max_steps(cli.max_steps)
         .precompute(cli.precompute);
     let solver = match cli.solver {
-        BuiltinSolvers::Naive => {
-            stupid::StupidSolver::build(&wl)?
-        },
-        _ => todo!()
+        BuiltinSolvers::Naive => stupid::StupidSolver::build(&wl)?,
+        _ => todo!(),
     };
     let mut game = builder.build()?;
 
     debug!("{game:#?}");
 
     let mut response: GuessResponse;
-    let mut guess: Word;
+    let mut _guess: Word;
     loop {
         response = solver.play(&mut game)?;
         println!("{response}");
diff --git a/src/error.rs b/src/error.rs
index 8b1b880..ab98955 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -17,7 +17,7 @@ pub enum Error {
     },
     // for `FromStr` of `BuiltinSolver`
     #[error("Unknown builtin solver")]
-    UnknownBuiltinSolver
+    UnknownBuiltinSolver,
 }
 
 #[derive(Debug, Clone, Error)]
diff --git a/src/game/mod.rs b/src/game/mod.rs
index be12292..ab40bc3 100644
--- a/src/game/mod.rs
+++ b/src/game/mod.rs
@@ -178,7 +178,7 @@ impl<'wl, WL: WordList> GameBuilder<'wl, WL> {
             length: super::DEFAULT_WORD_LENGTH,
             precompute: false,
             max_steps: super::DEFAULT_MAX_STEPS,
-            wordlist: wl
+            wordlist: wl,
         }
     }
 
diff --git a/src/game/response.rs b/src/game/response.rs
index a74303f..d14f02c 100644
--- a/src/game/response.rs
+++ b/src/game/response.rs
@@ -25,7 +25,11 @@ pub enum Status {
 }
 
 impl GuessResponse {
-    pub(crate) fn new<WL: WordList>(guess: Word, status: Vec<(char, Status)>, game: &Game<WL>) -> Self {
+    pub(crate) fn new<WL: WordList>(
+        guess: Word,
+        status: Vec<(char, Status)>,
+        game: &Game<WL>,
+    ) -> Self {
         let finish: bool = if game.step() > game.max_steps() {
             true
         } else {
diff --git a/src/solve/naive/mod.rs b/src/solve/naive/mod.rs
index e69de29..8b13789 100644
--- a/src/solve/naive/mod.rs
+++ b/src/solve/naive/mod.rs
@@ -0,0 +1 @@
+