Event: Div 2 - Weston Trophy

Opponent Rating Result
John R Mercy 1766 ½ - ½
Szilard Tamas 1846 ½ - ½
Chris G Willey 1758 1 - 0
Ivan Dunnachie 1857 0 - 1
Phil Griffiths 1837 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1813 = (9064 + 400 * (1 - 1)) / 5)

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