Event: Division 1

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Opponent Rating Result
Dave Young 1396 1 - 0
Steve Harrington 1610 0 - 1
Nigel Redmond 1641 0 - 1
Robert Dennington 1634 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1570 = (6281 + 400 * (2 - 2)) / 4)

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