Event: Division 1

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Opponent	Rating	Result
Gavin Wall	2305	0 - 1
John D Carlin	2277	0 - 1
John J Cox	2330	½ - ½

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

2037 = (6912 + 400 * (0 - 2)) / 3)