Event: Division Two

Opponent Rating Result
Nigel S Towers 1855 0 - 1
John Freeman 1726 ½ - ½
Jim A Gillespie 1522 1 - 0
Ben Larkin 1945 0 - 1
Derek Backhouse 1743 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1598 = (8791 + 400 * (1 - 3)) / 5)

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