Couples who play together, stay together—especially if what they play is intellectually stimulating, engaging, and enough to bring them closer together as a couple while at the same time, improving their brainpower. If you want to know some of the very best intellectual games you can play as a couple, consider the following smart games to add to your board game nights. Chess Chess for couples is one of the most intellectual games you can play, and for good reason: playing regularly with chess sets is known to improve your brain power, improve your memory, and even increase your IQ. Chess is one of the most beneficial games you can…