Event: Open County Championship

Opponent Rating Result
Roy Hughes 2085 1 - 0
Declan Shafi 2288 0 - 1
Andrew P Lewis 2283 0 - 1
Martin G Walker 2180 0 - 1
Gwilym T Price 2262 ½ - ½
Andrew P Lewis 2283 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2097 = (13381 + 400 * (1 - 3)) / 6)

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