Event: Division 4

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Opponent Rating Result
Stephen Rumsby 1547 1 - 0
Roland Robson 1367 ½ - ½
Rocco Beer 1105 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1606 = (4019 + 400 * (2 - 0)) / 3)

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