Event: Summer League (Pool A)

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Opponent	Rating	Result
Ian P Blencowe	1518	0 - 1
David Horton	1350	1 - 0
Ian Webster	1411	1 - 0
Charles Martin	1230	1 - 0
Charles Martin	1230	1 - 0
Ian Webster	1411	1 - 0
David Horton	1350	0 - 1
Ian P Blencowe	1518	1 - 0

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

1577 = (11018 + 400 * (6 - 2)) / 8)