Event: B&DCL Div 4

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Opponent Rating Result
Stuart Mallon 1727 0 - 1
Oleksii Panchenko 1600 0 - 1
Robert M Willington 1672 0 - 1
Andrew M Alderton 1587 ½ - ½
John E Harris 1578 ½ - ½
Stuart Mallon 1727 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1515 = (9891 + 400 * (1 - 3)) / 6)

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