Yes, I want to talk about categories that are still missing. Games with pieces that can merge or split apart, as in Fusion Chess, is another missing category. One option would be to have a category for different rules concerning pieces, such as Diff-PieceRules, which could parallel Diff-BoardRules without being anymore specific. However, this might already overlap with Diff-Moving or Diff-Capturing.
Amidst all this, could there be a category for Different Promotion Rules? (Like in Short Sliders.)
Amidst all this, could there be a category for Different Promotion Rules? (Like in Short Sliders.)