Event: NSDCA Division 1

Opponent Rating Result
John P Ewens 1940 1 - 0
David P Price 1647 1 - 0
Jon EW Blackburn 1628 1 - 0
David I Hulme 1772 1 - 0
Martin J Burns 1910 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2179 = (8897 + 400 * (5 - 0)) / 5)

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