The more time a game is in the market, the more are the innovations. Every game that gets a bit of fame tries different variations. Take lawn tennis and you have singles, doubles and mixed doubles.
Backgammon, an enticing board game, has been molded into too many variants that they have begun to get confused. The newcomers may be happy with the Blast Off and Eureika and the intermediaries with Fevga, Gioul and Narde. These are the variations that have a fan following in their country of origin.

There is no lack of variants that are quite interesting and even attract the champions sometimes. The backgammon to lose is a unique format where the rule is that the last remaining player wins. Suppose in horse racing that the loser wins, then what a lot will not happen!

There are shorter and longer variants of the game too, called HyperGammon and LongGammon. There are other grueling variations too.