diff --git a/src/js/types.d.ts b/src/js/types.d.ts
index 09d85de..3633da2 100644
--- a/src/js/types.d.ts
+++ b/src/js/types.d.ts
@@ -6,16 +6,9 @@ type CellOwner = "" | "r" | "b";
 /**
  * Represents a row of the game field.
  */
-type Row = [CellOwner, CellOwner, CellOwner, CellOwner, CellOwner, CellOwner, CellOwner];
+type Row = CellOwner[];
 
 /**
  * Represents a game board.
  */
-type Board = [
-    Row,
-    Row,
-    Row,
-    Row,
-    Row,
-    Row
-];
+type Board = Row[];