Event: U1800 Cup

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Opponent	Rating	Result
Martyn Colebrook	1480	1 - 0
John Price	1540	1 - 0
Robert L Jones	1765	½ - ½

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

1862 = (4785 + 400 * (2 - 0)) / 3)