Grandpa Moses was brilliant by all accounts. Although he was the son of a minister, and grew up in an evangelical house where playing cards was forbidden, he played cards, and not only did he play cards, but he was a card counter. He knew by the cards that folks discarded in any given game exactly what cards they held in their hand . . . Amazing.
AND he knew how to play backgammon and win, knew how to throw the dice so that he could get whatever combination of numbers he needed!