Tired of playing chess with the same old rules? You can play chess with different rules instead! Make pieces explode in atomic chess (don't blow up your king), or conjure pieces from the future in time travel chess (just make sure you don't break the timeline), or try any of dozens of other crazy and slightly less crazy variants!

Suppose you have N men and N women, and each of them submits preference rankings for the other set of people. It's your job to pair them up to go to a dance, but you need to make sure that nobody wants to cheat: make sure no pair of people likes each other better than their partners. Can you always make it work? What if the women bribe you to care more about their preferences? What if the situation isn't so ridiculously heteronormative? Aah! Matching is hard!

Mint-apple sauce food tongue. Pear spinach sauce food tongue. Pear wonton pasta-peach-sauce food tongue? Pear shrimp kumquat plantain mint-apple clam peach-sauce pear!