I'm going to [somewhat] briefly explain Ur for the Event. It's going to look complicated, but it's pretty simple when actually put into practice:
This is the basic layout for the game, which consists of 2 players[Wooden Buttons for P1, and Stone Buttons for P2], where the goal is to get all 7 of the pieces from the beginning of the board to the end of the board.
In the real game, there were 4 "dice" which had the ability to roll a 1 or a 0. This meant that you could roll a 0, skipping your turn, or a 1, 2, 3, or 4. To have this work in game, whoever is playing will be rolling a 1d5-1 every turn, so it's only possible to get a 0, 1, 2, 3, or 4.
The blue spaces on the board are spaces which only their respective player can land on, whereas the green spaces are a "battlefield", in which either player can send another player's piece back into their hand. The five stars on the board, called the rosettes, are places which, when landed on, the player is allowed to roll again, and are invulnerable from being sent back into the player's hand. For example, if a piece is on the space just behind the Green Rosette Space, and someone rolls and lands their piece on the same space, the original piece would return to the player, able to be used again, but have to go through the entire board. However, if that piece was on the Green Rosette, it would be impossible for anyone to roll a piece onto that space.
In order to send a piece "off" the board, which is the objective of the game, you must get them past the space with the arrow on it, but must roll exactly enough to do so. For example, if a piece is on the Blue Rosette just before the arrow, you can only roll a two in order to send them off the board, one to land on the arrow, and one to get off the board. As well, if you were to roll a three, and decide to put a piece onto the board, you would spend one movement to get onto the board, then the other two to go to the space just behind the Blue Space Rosette.
In some cases, your turn can be skipped while playing. One example is when you roll the 1d5-1, you roll a 0. Another example would be rolling a 1, 2, 3, or 4, and not being able to move any of your pieces. To be able to move a piece, you must move it the exact amount that you rolled. You can't roll a two, and move a piece one, or roll a four and move it one, etc.
Finally, there is a variant which Brit & I have come up with, in which both players are given a certain amount of golden coins, and everytime a player's button passes, but does not land on a rosette, they must put a golden coin on the side, and when a player lands on a rosette, they collect the golden coins that are there. Any other rules or questions will be explained/answered during the event, unless you're overly confused, then you should probably PM myself or
BoredBrit on discord.