Event: Division 3

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Opponent Rating Result
Peter K Harrison 1750 1 - 0
Mark BW Waterfield 1756 0 - 1
David J Walton 1615 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1707 = (5121 + 400 * (1 - 1)) / 3)

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