Event: 53rd Cotswold Open

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Opponent	Rating	Result
Robert M Ashworth	1897	1 - 0
David L Roberts	2030	1 - 0
Aitor Garcia-Ruiz	2117	1 - 0
Yichen Han	2500	0 - 1
Michael J Ashworth	2142	1 - 0
Dominic Mackle	2239	1 - 0

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

2421 = (12925 + 400 * (5 - 1)) / 6)