Wikipedia Trails: From Lugh to Draughts

Lugh: Lugh is an Irish god of many things, commonly equated to Mercury. He is the son of Cian and Ethniu, and a member of the Tuatha Dé Danann. He is best known for killing his grandfather, the tyrant Balor. He invented a number of things, including the board game fidchell.

Fidchell: Fidchell, also called gwyddbwyll, is an ancient Celtic board game. Played on a 7 by 7 grid, it was said to sometimes have supernatural powers over real events. Little evidence remains for how it was played, though it is theorized to have been a battle between two players, one of whom was trying to get their king piece to the outside of the board. The word fidchell morphed over time into ficheall, which is the Modern Irish word for chess.

Ludus latrunculorum: This is a game that is theorized to be similar to fidchell. Even less is known about how this game was played- five different, playable rule reconstructions exist, which range from being similar to checkers to being more chess-like. These reconstructions don't even agree on what the dimensions of the board or number of pieces should be.

Draughts/Checkers: Checkers, called Draughts in British English, is a game of strategy in which two players try to capture each other's pieces on an 8 by 8 or 10 by 10 board. I had previously thought that checkers was just a simple game, but from this article, I learned that there is in fact strategy involved, and there is a World Championship for the game. 

One theorized way to play Ludus latrunculorum. (Source)