Last night’s two-hour Playoffs Round had Jennifer Hudson, then Blake Shelton, guiding their six-person teams to emotional and challenging performances, then slicing those teams in half. Hudson made the right choices, selecting the most electrifying or captivating singers from her group – and so did Shelton, from his, including Chloe Kohanski, pictured, performing a smartly subdued version of Cyndi Lauper’s “Time After Time.” (Well, I correctly identified all s