Event: OTB HBZGP 8v8

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Opponent Rating Result
Mark RA Murrell 1755 ½ - ½
Philip Staniland 1664 0 - 1
Mark RA Murrell 1771 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (5190 + 400 * (0 - 1)) / 3)

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