Event: U1450

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Opponent	Rating	Result
Martin J Chadwick	1297	½ - ½
Luke Attwater	1389	1 - 0
Becky Kerton	1413	0 - 1

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

1366 = (4099 + 400 * (1 - 1)) / 3)