Event: Division 3

Opponent Rating Result
Hendrik Brackmann 2150 ½ - ½
John S Walton 1810 1 - 0
Iozeph Okosieme 1993 ½ - ½
Alistair P Dyte 1765 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2130 = (7718 + 400 * (2 - 0)) / 4)

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