Event: Durham City Club Tournament

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Opponent	Rating	Result
Vaughan Davison	1585	1 - 0
Dave Renton	0	½ - ½
Andy Proudfoot	1547	1 - 0
Philip Brooks	1581	½ - ½
Ken P Neat	2169	0 - 1

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

1456 = (6882 + 400 * (2 - 1)) / 5)