Event: Division A

Opponent Rating Result
Jim Sumner 2120 ½ - ½
Matthew JE Searles 1933 ½ - ½
John Whitfield 1797 1 - 0
Matthew JE Searles 1933 ½ - ½
Jon I Lonsdale 1906 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2098 = (9689 + 400 * (2 - 0)) / 5)

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