https://github.com/davepinch/pinchy.cc/blob/master/content/topics/gaming/board-games/royal-game-of-ur/royal-game-of-ur.md
RoyalUr.net - Play the Royal Game of Ur (royalur.net) The Royal Game of Ur is one of the oldest board games in the world, with evidence of it being played by people who lived over 4500 years ago. That includes many play-urs enjoying the game today!
I have never made much account of what has proceeded from my own mind; and so long as I gathered no other advantage from the Method I employ beyond satisfying myself on some difficulties belonging to the speculative sciences, or endeavouring to regulate my actions according to the principles it taught me, I never thought myself bound to publish anything respecting it.