Event: Open County Championship

Opponent Rating Result
Declan Shafi 2288 1 - 0
Michael Harris 2327 1 - 0
Stephen C Ledger 2145 1 - 0
Declan Shafi 2288 1 - 0
Martin G Walker 2180 ½ - ½
Stephen C Ledger 2145 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2496 = (13373 + 400 * (4 - 0)) / 6)

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