Cribbage

Cribbage was a card game. In 1852, Ada Lovelace regularly played 5-card cribbage at the Papplewick Arms. She did so in secret, escaping from Newstead Abbey at night, as Colonel Wildman had been instructed not to allow her to engage in gambling.

On the night after first meeting her, the Fourth Doctor found the pub which Lovelace frequented. Rather than outright oppose her interest, the Doctor joined in. He partnered with Lovelace, competing against two other pairs, consisting, in some order, of Harry, Ted, George, and Charlie. (AUDIO: The Enchantress of Numbers)