diff --git a/labirust/src/executor.rs b/labirust/src/executor.rs
index 99b1794..b9e3320 100644
--- a/labirust/src/executor.rs
+++ b/labirust/src/executor.rs
@@ -92,21 +92,15 @@ impl<'m> Context<'m> {
 mod builder;
 
 /// A structure holding a [`Maze`] and iteratively solving it with a provided [`Algorithm`].
-pub struct Executor<Algo>
-where
-    Algo: Algorithm,
-{
+pub struct Executor {
     delay: Duration,
     maze: Maze,
-    algorithm: Algo,
+    algorithm: Box<dyn Algorithm>,
 }
 
-impl<A> Executor<A>
-where
-    A: Algorithm,
-{
+impl Executor {
     /// Constructor.
-    fn new(maze: Maze, algorithm: A, delay: Duration) -> Self {
+    fn new(maze: Maze, algorithm: Box<dyn Algorithm>, delay: Duration) -> Self {
         Self {
             maze,
             algorithm,
@@ -114,22 +108,27 @@ where
         }
     }
 
-    pub fn build<'f, F, MS>(algorithm: A, builder: F) -> Self
+    pub fn build<'f, A, F, MS>(algorithm: A, builder: F) -> Self
     where
+        A: Algorithm + 'static,
         MS: BuildableMazeState,
         F: Fn(ExecutorBuilder<Unprovided>) -> ExecutorBuilder<MS>,
     {
         let operation = builder;
         let builder = (operation)(new_builder());
         let (maze, delay) = builder.build();
+        let algorithm = Box::new(algorithm);
         Self::new(maze, algorithm, delay)
     }
 
-    pub fn build_dyn<F>(algorithm: A, builder: F) -> Self
+    pub fn build_dyn<F>(algorithm: Box<dyn Algorithm>, builder: F) -> Self
     where
         F: Fn(DynExecutorBuilder) -> DynExecutorBuilder,
     {
-        todo!()
+        let operation = builder;
+        let builder = (operation)(DynExecutorBuilder::new());
+        let (maze, delay) = builder.build();
+        Self::new(maze, algorithm, delay)
     }
 
     /// Submit the maze to the [`Algorithm`] and iteratively progress through the maze driven by said algorithm.
diff --git a/labirust/src/executor/builder.rs b/labirust/src/executor/builder.rs
index d08e862..994b737 100644
--- a/labirust/src/executor/builder.rs
+++ b/labirust/src/executor/builder.rs
@@ -11,7 +11,7 @@ pub mod maze_state {
     /// Describe the state of the [`Maze`] parameter in the builder of an [`crate::Executor`]. Not ment to be implemented.
     pub trait MazeState {}
     pub trait BuildableMazeState: MazeState {
-        fn get(self) -> Maze;
+        fn get(&self) -> Maze;
     }
 
     pub struct Unprovided;
@@ -30,8 +30,8 @@ pub mod maze_state {
 
     impl MazeState for Provided {}
     impl BuildableMazeState for Provided {
-        fn get(self) -> Maze {
-            self.maze
+        fn get(&self) -> Maze {
+            self.maze.clone()
         }
     }
 
@@ -51,7 +51,7 @@ pub mod maze_state {
 
     impl MazeState for Generated {}
     impl BuildableMazeState for Generated {
-        fn get(self) -> Maze {
+        fn get(&self) -> Maze {
             self.generator.generate()
         }
     }
@@ -120,4 +120,34 @@ impl<MS: BuildableMazeState> ExecutorBuilder<MS> {
     }
 }
 
-pub struct DynExecutorBuilder {}
+pub struct DynExecutorBuilder {
+    maze: Option<Box<dyn BuildableMazeState>>,
+    delay: Duration,
+}
+
+impl DynExecutorBuilder {
+    pub(crate) fn new() -> Self {
+        Self {
+            maze: None,
+            delay: Duration::from_millis(100),
+        }
+    }
+
+    pub fn maze(self, maze: Maze) -> Self {
+        todo!()
+    }
+
+    pub fn generated(self, maze: Box<dyn MazeGenerator>) -> Self {
+        todo!()
+    }
+
+    pub fn delay_ms(self, delay: u64) -> Self {
+        todo!()
+    }
+
+    pub(crate) fn build(self) -> (Maze, Duration) {
+        let maze = self.maze.expect("no buildable maze provided").get();
+        let delay = self.delay;
+        (maze, delay)
+    }
+}