Event: Major

Opponent Rating Result
Arnold Hunt 1477 0 - 1
Stephen D Simon 1206 1 - 0
Gary Shelley 1416 1 - 0
Barry DA Fraser 1455 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1589 = (5554 + 400 * (3 - 1)) / 4)

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