Event: Division 1 - Open

Opponent Rating Result
Andrew S Kinder 1828 1 - 0
Charles V Howard 1877 1 - 0
James Schofield 1892 ½ - ½
Freddie Sugden 1671 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2017 = (7268 + 400 * (2 - 0)) / 4)

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