Event: OTB HBZGP 8v8

Opponent Rating Result
Ashley Freeman 1871 1 - 0
Philip Staniland 1664 ½ - ½
Terry D Whitton 1780 ½ - ½
Terry D Whitton 1756 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1868 = (7071 + 400 * (1 - 0)) / 4)

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