How does the Belt Ranks System work for the mahjong versions available on your site? Is it the same for all versions?

Q: How does the Belt Ranks System work for the mahjong versions available on your site? Is it the same for all versions?
A: The Belt Ranks System does not work similarly for all the versions. Hong Kong, Mahjong Competition Rules and American share the same belt rating, whereas Riichi Competition, European Classical and Taiwanese versions have different ratings.

 

Belt Hong Kong/Competition Rules/ American Riichi European Taiwanese
         
White belt <1 <120 <2 <0.2
One green stripe on white belt 1-4.99 120-599.99 2-9.99 0.2-0.99
Two green stripes on white belt 5-9.99 600-1199.99 10-19.99 1-1.99
         
Green belt 10-24.99 1200-2999.99 20-49.99 2-4.99
One brown stripe on green belt 25-49.99 3000-5999.99 50-99.99 5-9.99
Two brown stripes on green belt 50-74.99 6000-8999.99 100-149.99 10-14.99
         
Brown belt 75-99.99 9000-11999.99 150-199.99 15-19.99
One black stripe on brown belt 100-149.99 12000-17999.99 200-299.99 20-29.99
Two black stripes on brown belt 150-199.99 18000-23999.99 300-399.99 30-39.99
         
Black belt 200+ 24000+ 400+ 40+

 

The ratings in all styles of Mahjong are calculated according to our formula which is based on Official International rules:

  1. NewRating= OldRating +( (Score*4 + Difficulty –OldRating)/41 ) /4

*The Difficulty is the average of all the participating players' ratings.

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