Event: Armstrong Cup

Opponent Rating Result
J Dave H Hair 1723 1 - 0
Andrew Perella 1659 1 - 0
John S Clarke 1817 ½ - ½
Andrew Perella 1625 ½ - ½
J Dave H Hair 1712 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1867 = (8536 + 400 * (2 - 0)) / 5)

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