At Gridgammon, there are 4 tourneys daily M-F, one on Saturday and one on Sunday. I live in USA, central standard time zone. The tourneys for me are, 2 ptrs, 9 am, 1 ptrs, noon, 3 ptrs, 4:30 pm, 1 ptrs, 7 pm, and Nackgammon 2 ptrs M-Thurs, 3 ptrs on Friday, 8:30 am 3 ptrs, on Saturdays, and 8:30 pm 1 ptrs on Sunday.
I won two tourneys yesterday.
The difference is mostly shorter matches and shorter sign-up time. They only allow 10 minutes of sign-up time, so you have to be on your toes. They are quickies.
Doesn't "expecting the unexpected" make the unexpected expected? ~ George Carlin