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Doncaster & District Chess Association
2021/22
Doncaster Jamboree
Event: Doncaster Jamboree
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Excel
Opponent
Rating
Result
David P Hatfield
1578
½ - ½
Phillip J Battye
1656
0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games
1417 = (3234 + 400 * (0 - 1)) / 2)
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