Event: Division 4

Opponent Rating Result
Andrew Powell 1503 ½ - ½
Barry Kocan 1597 0 - 1
Thomas Plummer 1200 0 - 1
John Conway 1567 0 - 1
Andy Glover 978 ½ - ½
Trevor Reece 1291 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1089 = (8136 + 400 * (0 - 4)) / 6)

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