Hello Guaponimo,
Welcome to Wikipedia and thank you for the barnstar. The edits to backgammon were fairly rudimentary and work-a-day, but I appreciate your appreciation.
Regarding creating a re-direct for anti-gammon, a bit of googling turns up very few hits for anti-gammon as a variant of backgammon, none of which would qualify as a reliable source. Meanwhile, the term seems to have recently acquired a totally different meaning in the last year or so. So I don't know that it would pass muster as a new page, even if it's only a redirect.
Which is to say that I'm not going to create it. That doesn't mean that you can't do it yourself. See https://en.wikipedia.org/wiki/Wikipedia:How_to_make_a_redirect for instructions. Even if the page gets deleted (and it might not) it should be a good introductory exercise in how wikipedia works. Happy editing! Mr. Swordfish (talk) 13:46, 8 February 2019 (UTC)