Event: Open

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Opponent	Rating	Result
Julian H Summerfield	143	0 - 1
Adam Szelc	181	0 - 1
Gordon SG Christie	145	0 - 1
Moin Uddin	133	0 - 1
Phil Wells	131	½ - ½
Julian H Summerfield	143	½ - ½
Adam Szelc	181	0 - 1
Gordon SG Christie	145	0 - 1
Moin Uddin	133	1 - 0
Christopher J Evans	131	1 - 0

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

-13 = (1466 + 400 * (2 - 6)) / 10)