Event: Whittlesford (Open)

Opponent Rating Result
Martin G Walker 2305 0 - 1
Savin Dias 2155 1 - 0
Jane Richmond 2200 1 - 0
Ian D Thompson 2215 ½ - ½
Phil Hopkins 2035 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2182 = (10910 + 400 * (2 - 2)) / 5)

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