Event: Division Four

Opponent Rating Result
Andrew Powell 1490 0 - 1
Steve Alcock 1530 ½ - ½
Ken Wise 1518 1 - 0
Mark Tangri 1533 0 - 1
Andy Tipper 1368 1 - 0
Aaron Norton 1506 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1558 = (8945 + 400 * (3 - 2)) / 6)

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