Ludus Duodecim Scriptorum – Duodecim Scripta – The Game of Twelve Inscriptions

From ancient games.com

Ludus Duodecim Scriptorum, or Duodecim Scripta, is an ancient Roman game, which combined elements of luck and strategy. It is somewhat similar to Backgammon, in the fact that each player has 15 pieces, and the pieces stack and move on and off the board in a similar fashion. The name Ludus Duodecim Scriptorum in Latin, means The Game of Twelve Inscriptions, and refers to the fact that many Duodecim Scripta boards had a Latin letter written for each cell, instead of just circles. There is a theory that the reason letters were used and not circles or squares is because the game was used for gambling, which was prohibited during the later years of the Roman empire, and so the writing on the boards was used as an excuse to call them “inscriptions”, instead of gambling devices, thus preventing the users from being arrested and the boards confiscated. I emphasize that this is just a theory, because some of the inscriptions are so specific to gaming and gambling that it is really hard to believe that somehow the inscription would conceal the gambling aspect of the game. The three large rosettes or circles in the center of the boards were markers where the players would put the coins that were being gambled on.

https://www.ancientgames.org/ludus-duodecim-scriptorum-duodecim-scripta-the-game-of-twelve-inscriptions/