Event: Division One

Opponent Rating Result
Matthew J Harborne 2150 ½ - ½
Ben Larkin 2163 ½ - ½
Ben Larkin 2163 0 - 1
Amrik J Singh 1959 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2109 = (8435 + 400 * (1 - 1)) / 4)

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