Event: Eastman Cup

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Opponent	Rating	Result
Claudio Moni	1735	½ - ½
David Foster	1455	1 - 0
Laurie Mackellar	1700	0 - 1

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

1630 = (4890 + 400 * (1 - 1)) / 3)