Event: Deric Cox Trophy

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Opponent	Rating	Result
H Martin Dale	1300	1 - 0
Anthony Barnett	970	½ - ½
David Wickes	1100	0 - 1

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

1123 = (3370 + 400 * (1 - 1)) / 3)