Event: Individual Challenge 2022-3

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Opponent	Rating	Result
Roger J Edwards	1641	1 - 0
Simon R Edwards	2043	0 - 1
David Millington	1629	0 - 1

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

1638 = (5313 + 400 * (1 - 2)) / 3)