Event: Atkinson Cup

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Opponent	Rating	Result
Andrei Ciuravin	2029	0 - 1
Paul Kennedy	1713	½ - ½
Paul SN Kendall	1878	0 - 1

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

1607 = (5620 + 400 * (0 - 2)) / 3)