Event: Division Four

Opponent Rating Result
Shane Cooksey 1457 ½ - ½
Javier Castells Gil 1400 0 - 1
Lennie Johnson 1593 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1483 = (4450 + 400 * (1 - 1)) / 3)

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