Event: Essex OL Open Championship

Opponent Rating Result
Martin McCall 1999 ½ - ½
John H Hodgson 2090 ½ - ½
Robin Slade 1996 0 - 1
George Horan 1871 1 - 0
Tom A Barton 1904 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1892 = (9860 + 400 * (1 - 2)) / 5)

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