Event: Division 1

Opponent Rating Result
John Cawdery 2089 0 - 1
David L Haydon 2336 ½ - ½
John Davenport 1959 1 - 0
Roman Ismailov 2024 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2102 = (8408 + 400 * (1 - 1)) / 4)

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