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Derbyshire Chess Association
2024/2025
Derby & District Division 1
2024/2025
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Derby & District Division 1
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Event: Derby & District Division 1
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Excel
Opponent
Rating
Result
Derek A Jarvis
1902
1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games
2302 = (1902 + 400 * (1 - 0)) / 1)
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