Event: Division 1

Opponent Rating Result
James Hall 2029 0 - 1
Callum Welsh 1941 ½ - ½
John K Holliday 1644 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1871 = (5614 + 400 * (1 - 1)) / 3)

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