Event: Spring OTB Division 4

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Opponent	Rating	Result
David Veress	1550	1 - 0
Ian Mitchell	1580	½ - ½
Terry Cowling	1639	0 - 1

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

1590 = (4769 + 400 * (1 - 1)) / 3)