An old proverb has it that a good son-in-law should be intelligent and nimble, "skilled at the six arts and at chess." If you believe this Yuan dynasty saying, it appears that chess ability was a requirement for the post of son-in-law.
「人人說道好女婿，… … 又聰明，又伶俐，雙六象棋通六藝」，根據元代話本這一說法，下一手好象棋儼然是乘龍快婿的必備條件了。