-/// The first template T parameter is the base type of the array, the W parameter
-/// is the weight applied to the bonuses when we update values with the << operator,
-/// the D parameter limits the range of updates (range is [-W * D, W * D]), and
-/// the last parameters (Size and Sizes) encode the dimensions of the array.
-template <typename T, int W, int D, int Size, int... Sizes>
-struct Stats : public std::array<Stats<T, W, D, Sizes...>, Size>
+/// The first template parameter T is the base type of the array, the second
+/// template parameter D limits the range of updates in [-D, D] when we update
+/// values with the << operator, while the last parameters (Size and Sizes)
+/// encode the dimensions of the array.
+template <typename T, int D, int Size, int... Sizes>
+struct Stats : public std::array<Stats<T, D, Sizes...>, Size>