Event: Division 2

Opponent Rating Result
Matthew Hammond 1780 ½ - ½
Richard J West 1708 1 - 0
Leighton Emson 0 1 - 0
Alex Jackson 0 1 - 0
Peter Nelson 1801 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1218 = (5289 + 400 * (3 - 1)) / 5)

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