| Player data |
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 | SNo | 30 | FIDE | 2003 | Local | 2000 |
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| Name | Kowalczyk, Mariusz | Fed | POL | R.ChessArbiter | 2144 |
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| Club | LKS PARK Starzenice | Title | I | Local ID | PL-4481 |
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| Code | 1126202 | Sex | M | Birthday | 1997-04-03 |
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| Number of rated opponents: | 9 | Score vs. rated opponents: | 7.0 |
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| Average rating: | 2027 | Rating Change: | 2.84 |
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