Event: Camberley Chess Club Championship 2023

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Opponent	Rating	Result
Robert Smith	1494	0 - 1
Luke Alstrom	1291	1 - 0
Lee Savill	0	½ - ½
James Wallman	1253	1 - 0
Martin J Wallman	1762	½ - ½

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

1240 = (5800 + 400 * (2 - 1)) / 5)