It’s another barn burner of a day here at the March Mayhem tournament. Bout 7 is a rollicking battle for the ages, pitting Reiner Knizia’s classic Tigris and Euphrates against the deceptively vicious tile placement juggernaut Azul. And then there’s this crazy match up: Stefan Feld’s classic Castles of Burgundy goes up against the thematic space thriller NEMESIS. How can we decide?