Someone's made a really nice implementation of the Royal Game of Ur including multiplayer and a fairly decent AI:
https://royalur.net/
(https://i.imgur.com/zJIwiyd.png)
I really do like the Royal Game of Ur - it's got a very strong catchup mechanic in that the further ahead you are, the harder it is not to get chased down and captured by the larger number of enemy pieces on the board. It is pretty luck driven but there's a degree of skill and strategy too.