Event: Christmas Rapid

Opponent Rating Result
Nikolay Starodubcevs-Snaiders 1400 1 - 0
Josh Bewsey-Holden 1500 1 - 0
Mark Heffer 1644 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1781 = (4544 + 400 * (2 - 0)) / 3)

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