Event: Billingham Synthonia Rapid February 2024

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Opponent	Rating	Result
John Marsden	1579	1 - 0
Brian Whitaker	1633	0 - 1
Harry Tennant	1540	½ - ½

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

1584 = (4752 + 400 * (1 - 1)) / 3)