Event: Leon Garfield Rapid-Play Cup

Opponent Rating Result
Peter McGill 1635 0 - 1
Leon A Garfield 1291 0 - 1
Joseph Morris 1391 0 - 1
Asher Sunil 1000 1 - 0
David Sawyer 1200 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1063 = (6517 + 400 * (1 - 4)) / 5)

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