Actually ive been playing chess the same way for 25 years. But if the rules for the game have changed every year, and i missed one book of changes each yeart for all the years ive played. Thats 25 book of improved rules on the game that people now call chess, that ive never read or even know about.
That's nice. There are people who have been playing the same edition of D&D, unchanged, for 30+ years. The fact that there are other versions of D&D hasn't affected them, just like the fact that there are other versions of Chess apparently hasn't affected you.
And if you're really interested in reading about thousands of variations on the rules of chess, here ya go.
And if you're really interested in reading hundreds of books about Chess, here ya go.