Event: Summer League Division 2

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Opponent	Rating	Result
Brian Crofts	1586	0 - 1
Nathaniel Holroyd-Doveton	1696	½ - ½
Robert Porter	1624	1 - 0
Colin Reid	1472	1 - 0
Brendan Stoneham	1507	0 - 1
David Matthews	1203	1 - 0

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

1581 = (9088 + 400 * (3 - 2)) / 6)