Event: Roger Goldsmith Div 2

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Opponent Rating Result
Haroon Majeed 1863 0 - 1
Alan Wadsworth 1758 ½ - ½
Alan Watkins 1827 0 - 1
Anthony Chan 1600 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1662 = (7048 + 400 * (1 - 2)) / 4)

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