Event: Division Four

Opponent Rating Result
Ray Bettam 1551 ½ - ½
Philip J Jones 1567 0 - 1
Hamish W Scott 1692 ½ - ½
Chaniru Ranasinghe 1539 0 - 1
Ben Cooper 1764 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1463 = (8113 + 400 * (0 - 2)) / 5)

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