With the help of an all-star panel, we’ve chosen 400 nominees for our battle engine. They include politicians, inventors, reformers, athletes, and entertainers. There are pioneers of business, medicine, education, arts, and science. This game serves them up in random pairs; you choose the winner. You’ll likely never see the same matchup twice, but if you find a battle you can’t keep to yourself, share it with friends on Twitter and Facebook. Over time, the more a Bostonian wins, the higher she or he rises. So vote early and often! We’ll publish our list of the 100 Best Bostonians in our January 2016 issue.