Event: Division A

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Opponent Rating Result
Martin Mitchell 2268 0 - 1
Malcolm R Peacock 2073 ½ - ½
Mike Kenworthy 0 1 - 0
Cliff H Rutlidge 1848 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1547 = (6189 + 400 * (1 - 1)) / 4)

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