It's wrong to not follow the rules when gaming.
Jan is one of several friends who have met for a night of board gaming.
Jan wants to win the game tonight.
Jan studies the rules, and figures out the optimal strategy to win.
Jan uses misdirection to take extra cards, giving him an unfair advantage.
Jan wins the game, and his friends congratulate him.
Jan wins the game, but when his friends found out that Jan wasn't playing by the rules, they refuse to play with him again.