In a Head-to-Head League, your team squares off in a weekly matchup against another manager's to see who can compile the best stats across a number of different categories.
A new weekly matchup begins every Monday and consists of a set number of games based on your league's statistical categories. Each stat category counts as one game, with the win going to the team that finishes the week with the highest total in that category (the cumulative total after each Sunday's games).
So, if in a given week, your team scores more goals than your opponent's, you would be credited with a victory. However, if your opponent's team ended the week with a better save percentage than your team, you'd be charged with a loss. If the two teams end up tied in a given category, each receives credit for a tied game.
This weekly win-loss total is added to a cumulative season record where each win counts for two points, each tie counts for one and each loss counts for none. The total of these points is used to determine standings and playoff seedings.
I've done it for baseball and hockey leagues, and its really pretty simple.
For more explanation on Blueshirt Banter FHL, keep reading after the jump