Event: Division 1

Opponent Rating Result
Malcolm J Lightfoot 1915 1 - 0
Panagiotis Kanellopoulos 2277 ½ - ½
David J Spence 2332 0 - 1
Malcolm J Lightfoot 1923 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2212 = (8447 + 400 * (2 - 1)) / 4)

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