Event: Whittlesford (Open)

Opponent Rating Result
Norman A Hutchinson 1953 1 - 0
David L Haydon 2403 0 - 1
Johnathan D Bourne 1990 1 - 0
Aarnavh Trivedi 1953 ½ - ½
Jaden Jermy 2058 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2231 = (10357 + 400 * (3 - 1)) / 5)

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