Event: Division 3

Opponent Rating Result
Peter J R Oliver 1560 ½ - ½
David J Barker 1463 0 - 1
Tony Brothwood 1629 0 - 1
Albert Chacko 1319 1 - 0
Peter Gavin 1438 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1402 = (7409 + 400 * (1 - 2)) / 5)

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