Event: Bath Summer Tournament 2022

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Opponent	Rating	Result
Robbie Hirst	0	0 - 1
Rob Draper	0	½ - ½
Roy Whaley	1275	1 - 0

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

425 = (1275 + 400 * (1 - 1)) / 3)