This paper aims at the construction of a cooperative partner system that plays a seven-card stud poker game with a human partner against a computer opponent player. The partner system gives a human partner player presentation about which tactics to take in a game and the grounds for presented tactics. When a human player makes another tactics, a human player and the partner system discuss which tactics to take by presenting their grounds for tactics to each other as follows.(1) A human player presents the grounds for his/her tactics.(2) If the partner system accepts the player's grounds, they take presented tactics. Otherwise, the partner system asks whether the player has other grounds or not. Through these discussions, a human player and the partner system play a poker game cooperating with each other
This paper also performs comparative experiments to confirm the usefulness of the presented partner system, where each subject plays games with/without the partner system.