Event: Northamptonshire Silver King League Division 2

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Opponent	Rating	Result
Bob McDonald	1694	½ - ½
Claude Masseron	1686	0 - 1
Peter Storey	1491	1 - 0

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

1624 = (4871 + 400 * (1 - 1)) / 3)