Event: Division 2 Cup

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Opponent	Rating	Result
Sam Watson	1482	1 - 0
Howard Brears	1628	1 - 0
Efe Kitis	1481	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1797 = (4591 + 400 * (2 - 0)) / 3)