| Player data |
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 | SNo | 20 | FIDE | 1949 | Local | 2200 |
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| Name | Kośny, Marek | Fed | POL | Birthday | 1953-05-30 |
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| Club | UKS TSz Zieloni Zielonka | Title | k | Local ID | PL-2753 |
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| Code | 1133845 | Sex | M | State | MA |
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| Number of rated opponents: | 9 | Score vs. rated opponents: | 6.0 |
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| Average rating: | 1889 | Rating Change: | 0.87 |
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