Event: Division 1

Opponent Rating Result
Andrew P Lewis 2278 0 - 1
Malcolm J Lightfoot 1894 0 - 1
Andrew P Lewis 2275 0 - 1
Simon Wilks 1926 ½ - ½
Jan Balogh 1995 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1754 = (10368 + 400 * (0 - 4)) / 5)

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