Event: Armstrong Cup

Opponent Rating Result
Andrew Perella 1659 1 - 0
Steve Burnell 1858 0 - 1
Richard Oxnard 1596 ½ - ½
John S Clarke 1820 0 - 1
Steve Burnell 1827 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1672 = (8760 + 400 * (1 - 2)) / 5)

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