Event: Major

Opponent Rating Result
Colm O'Shea 1834 ½ - ½
Samuel Riggs 1645 1 - 0
Derek W Hadley 1641 1 - 0
Cledwyn Davies 1615 1 - 0
Greg Billenness 1780 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1863 = (8515 + 400 * (3 - 1)) / 5)

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