Abstract: A portable electronic card game simulator having a housing mounting a display and input keys and containing electronic data processing circuitry organized to provide the automatic play of a hand of Gin Rummy in opposition to an operator. The simulator deals a hand to the operator and to the electronic opponent. The play of the electronic opponent is controlled by circuitry to simulate the play of a human in accordance with the rules of the game. The simulator includes circuitry for determining the presence of runs, of cards of the same value, and of the value of cards left in a hand.