Event: Spring OTB Division 4

Opponent Rating Result
David N Holt 1743 0 - 1
Dave S Almond 1730 ½ - ½
Khalid Khokhar 1489 1 - 0
Christopher Hodgson 1684 0 - 1
David Mathieson 1569 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1643 = (8215 + 400 * (2 - 2)) / 5)

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