Event: Doncaster League

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Opponent Rating Result
Zak Tomlinson 1841 ½ - ½
A David Smart 1539 1 - 0
Martin J Sheard 1884 0 - 1
Richard F Hall 1761 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1656 = (7025 + 400 * (1 - 2)) / 4)

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Opponent Rating Result
Colin Parrish 1551 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1951 = (1551 + 400 * (1 - 0)) / 1)