Event: 54th Cotswold Minor

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Opponent	Rating	Result
Nathan Cave	1595	1 - 0
Siyao Ou	1419	0 - 1
Ben Hughes	1210	1 - 0
Tom A Cleverley	1629	1 - 0
Stephen Williams	1598	0 - 1

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

1570 = (7451 + 400 * (3 - 2)) / 5)