Event: Div 1 - Davy Trophy

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Opponent Rating Result
Martin Pettinger 2029 ½ - ½
Peter M Gayson 2126 1 - 0
Samuel A Milson 2210 0 - 1
Chris N Ross 2220 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2146 = (8585 + 400 * (1 - 1)) / 4)

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