Event: Division Five

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Opponent Rating Result
Peter J Hughes 1383 0 - 1
Richard Simpson 1270 ½ - ½
Stephanie Brown 0 0 - 1
Phil Dyson 1302 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

889 = (3955 + 400 * (1 - 2)) / 4)

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