Event: Ladder

Opponent Rating Result
Martin Thompson 1485 1 - 0
Thomas Beckwith 1839 1 - 0
Steve Armstrong 1492 1 - 0
Thomas Beckwith 1624 0 - 1
Thomas Beckwith 1633 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1775 = (8073 + 400 * (3 - 1)) / 5)

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