diff --git a/src/lib.rs b/src/lib.rs
index 76f737a..1cfd376 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -89,5 +89,7 @@ pub mod uci;
 
 /// The eschac prelude.
 pub mod prelude {
-    pub use crate::{position::Position, san::San, setup::Setup, uci::UciMove};
+    pub use crate::{
+        bitboard::Bitboard, board::*, position::Position, san::San, setup::Setup, uci::UciMove,
+    };
 }