Event: Division 2

Opponent Rating Result
Philip Sykes 1562 ½ - ½
Peter Turner 1309 ½ - ½
Ryan Wood 1390 0 - 1
David Smith 1129 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1348 = (5390 + 400 * (1 - 1)) / 4)

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