Event: Division 4

Opponent Rating Result
Wojciech Slupski 1481 1 - 0
Patrick Eaton 1422 0 - 1
Stephanie Brown 1384 0 - 1
Tony Newbanks 1100 ½ - ½
Penny A Wood 1443 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1206 = (6830 + 400 * (1 - 3)) / 5)

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