Event: D Division

Opponent Rating Result
Dave Elsdon 1200 1 - 0
John Marsden 1399 1 - 0
Zhuoyi Lin 1390 1 - 0
J Alan Stockley 1402 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1748 = (5391 + 400 * (4 - 0)) / 4)

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