Event: Division 1

Opponent Rating Result
Paul W Anderson 1762 ½ - ½
Rob Lockwood 1588 ½ - ½
Michael Jackson 1871 0 - 1
David Wm Smith 1790 0 - 1
Rob Lockwood 1622 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1647 = (8633 + 400 * (1 - 2)) / 5)

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