Event: Division 1

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Opponent Rating Result
Nigel E Povah 2283 0 - 1
Colin Purdon 2088 1 - 0
Mark Josse 2260 ½ - ½
Blair N Connell 2215 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2112 = (8846 + 400 * (1 - 2)) / 4)

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