On October 21, the Toronto Maple Leafs suffered a tough loss against the Ottawa Senators. They fell behind 3-0 after two periods, and a goal frenzy in the third led to a 6-3 final score. The major issue: the Leafs struggled mightily to beat the Senators' 1-3-1 forecheck.
It's been a big conversation topic around the league for a while, but in case you aren't familiar with it, here's a little refresher.
The 1-3-1 is a forechecking system that gained league-wide attention in the 2010-11 season, when the Tampa Bay Lightning and the Philadelphia Flyers played what might be the most boring hockey game ever.