Tigmanshu challenged the actor to a game of chess and only after he beat him hands down, did he let him sign on the dotted line.
A source says, "For the sequel of Saheb, Biwi aur Gangster, everyone thought that since Irrfan is Tigmanshu's good friend, getting in would be a cakewalk for Irrfan. But the director came up with this unique test." Irrfan finally beat Tigmanshu in the game and came on board for the film.
The source adds, "It was only later that Tigmanshu explained to Irrfan that since his character plays mind games in the film, he wanted to see him in action in real-life too."