Event: SCCA Division 1

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Opponent	Rating	Result
Ed Kirkham	0	½ - ½
Andrew Shephard	1864	1 - 0
Simon Riley	1620	1 - 0

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

1428 = (3484 + 400 * (2 - 0)) / 3)