A strange little side quest
Between one round of Obby: Defend your base from 67 and the next, this is worth knowing: Games resembling checkers were being played thousands of years ago; evidence of related games reaches back to around 1600 BC. The same trail leads to another fact: Midway's Gun Fight from 1975 was the first arcade video game to use a microprocessor. The details change, but the appeal of learning a system and trying again is remarkably persistent.