Event: 6th Somerset New Year Intermediate

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Opponent	Rating	Result
Sam Wood	1662	1 - 0
David R Rogers	1682	0 - 1
Leon Nelson	1716	0 - 1
Lynne J Fursman	1636	½ - ½
Huw Jones	1728	½ - ½

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

1605 = (8424 + 400 * (1 - 2)) / 5)