These are the most focused rivalries in the league,
as determined by the aggregate rivalry score (points of A->B + points of B->A).

Philadelphia Flyers 129.98 Pittsburgh Penguins
Montreal Canadiens 128.61 Boston Bruins
New York Rangers 109.53 New York Islanders
St. Louis Blues 108.92 Chicago Blackhawks
San Jose Sharks 105.46 Los Angeles Kings
Minnesota Wild 96.10 Colorado Avalanche
New York Rangers 90.28 New Jersey Devils
Anaheim Ducks 87.05 Los Angeles Kings
Ottawa Senators 72.74 Toronto Maple Leafs
Toronto Maple Leafs 68.03 Montreal Canadiens

One team's fans may see another team as a rival, but it isn't always reciprocated.
This list shows the largest gaps in Rivalry Score between two teams.

63.14 Arizona Coyotes 60.67 Los Angeles Kings 2.47
56.17 Columbus Blue Jackets 54.56 Pittsburgh Penguins 1.62
50.26 Nashville Predators 45.77 Chicago Blackhawks 4.49
50.27 Washington Capitals 40.84 Pittsburgh Penguins 9.43
64.34 New Jersey Devils 38.40 New York Rangers 25.94
51.06 Calgary Flames 35.26 Vancouver Canucks 15.80
36.03 Tampa Bay Lightning 34.92 Boston Bruins 1.11
38.76 Buffalo Sabres 34.57 Toronto Maple Leafs 4.19
36.50 Tampa Bay Lightning 32.27 Montreal Canadiens 4.23
43.95 Winnipeg Jets 31.99 Minnesota Wild 11.95