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2 percent of brackets have both teams

Only 2 percent of the 6.45 million Tournament Challenge brackets got both Louisville and Ohio State to reach the Final Four. That would be because just 6.8 percent of brackets had Louisville in the Final Four (highest of the No. 4 seeds, though), compared to 34.4 percent for Ohio State (even more than No. 1 seed Syracuse, which was picked to advance in 22.8 percent of brackets).

There are three brackets (here, here and here) tied for the lead with 1,010 points, and each has a different team winning the championship. (Note: The winner of the grand prize isn't necessarily the entry with the most points at the end of the tournament, but rather a drawing of entries that score in the top 1 percent of the game.)

President Obama's bracket

The president got Ohio State into the Final Four but missed Louisville. His other two Final Four teams (Kentucky and North Carolina) are still alive. He has 780 points, ranked in the 98.4 percentile overall.

Looking ahead to Sunday

Percent of brackets picking each team to reach the Final Four:

Kentucky: 68.3 percent

Baylor: 10.6 percent

North Carolina: 57.0 percent

Kansas: 18.2 percent

Percent picking these combinations of teams to reach the Final Four:

Kentucky/North Carolina: 41.6 percent

Kentucky/Kansas: 20.9 percent

Baylor/North Carolina: 5.3 percent

Baylor/Kansas: 3.4 percent

Percent picking these entire Final Four combinations:

Louisville/Ohio State/Kentucky/North Carolina: 0.7 percent (48,110 total)

Louisville/Ohio State/Kentucky/Kansas: 0.4 percent (25,304 total)

Louisville/Ohio State/Baylor/North Carolina: 0.1 percent (7,211 total)

Louisville/Ohio State/Baylor/Kansas: 0.1 percent (4,255 total)

Brackets to pick national champion among remaining teams

Kentucky: 35.1 percent

North Carolina 17.9 percent

Kansas: 6.2 percent

Ohio State: 4.8 percent

Baylor: 1.7 percent

Louisville: 0.8 percent

Notable brackets (Total points, percentile; Final Four teams remaining)

President Obama: (780; 98.4; 3)

Jay Bilas: (700; 88.8; 3)

Andy Katz: (620; 63.2; 3)

Dick Vitale: (450; 9.4; 2)

Doug Gottlieb: (690; 86.3; 3)

Mike Greenberg: (540; 32.5; 2)

Mike Golic: (780; 98.4; 3)

Colin Cowherd: (620; 63.2; 2)

Michelle Beadle: (460; 11.0; 1)

Michael Wilbon: (600; 55.6; 1)

Tony Kornheiser: (690; 86.3; 3)

Scott Van Pelt: (730; 94.2; 3)

LeBron James: (600; 55.6; 3)

Chalk bracket (picking all higher seeds): (640; 71.3; 2)

America's bracket: (700; 88.8; 3)