Event: Bath Summer Tournament 2023

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Opponent	Rating	Result
Roy Whaley	1256	½ - ½
Duncan Mak	1260	1 - 0
Wayne Timbrell	1418	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1311 = (3934 + 400 * (1 - 1)) / 3)