Event: Whittlesford (Open)

Opponent Rating Result
David N Walker 1900 ½ - ½
Neil H Bradbury 2339 1 - 0
Jaden Jermy 2058 1 - 0
David L Haydon 2403 ½ - ½
Martin G Walker 2305 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2361 = (11005 + 400 * (2 - 0)) / 5)

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