Event: U1650 Cup

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Opponent	Rating	Result
Melvin Steele	1608	0 - 1
Felix Todd	1600	0 - 1
John Barty	1285	½ - ½

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

1231 = (4493 + 400 * (0 - 2)) / 3)