By the 1930s, many revisions of the rules developed that were substantially different from Babcock's classical version (including some that were considered fundamentals in other variants, such as the notion of a standard hand).
Do 30-tih godina prošlog stoljeća napravljeno je mnogo izmjena pravila koje su se odmaknule od Babcockove klasične verzije (uključujući i neke koje se smatraju osnovnim u ostalim varijantama, poput standardne ruke).