Event: 53rd Cotswold Open

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Opponent	Rating	Result
Philip Staniland	1926	1 - 0
Stephen J Homer	2030	½ - ½
Richard CP Freeman	1975	½ - ½
Timothy J Kett	2145	½ - ½
Graham Bolt	2058	1 - 0
Jonathan WR Underwood	2082	½ - ½

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

2169 = (12216 + 400 * (2 - 0)) / 6)