Event: Sheffield Mini Standardplay OTB

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Opponent Rating Result
George Swanson 1540 0 - 1
Luke Harper 1270 0 - 1
Oliver Dewis 119 1 - 0
Michael W Simmons 1165 ½ - ½
John Crewe 119 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

843 = (4213 + 400 * (2 - 2)) / 5)

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