Event: Open

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Opponent Rating Result
Martin P Burrows 2123 0 - 1
Simon E Lazarus 2026 1 - 0
Alan Agnew 2192 ½ - ½
Jack Pilley 2075 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2004 = (8416 + 400 * (1 - 2)) / 4)

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