diff --git a/game.nim b/game.nim
index ed5b2a9..a295a40 100644
--- a/game.nim
+++ b/game.nim
@@ -50,7 +50,8 @@ type
     initialized: bool
 
 
-proc `[]`*[T](b: var Board, idx: T): var Square =
+# use a template here for better inlining
+template `[]`*[T](b: var Board, idx: T): var Square =
   b.squares[idx]