| Player data |
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 | SNo | 4 | FIDE | R 1980 | Local | 2000 |
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| Name | KOWALCZYK, Mariusz | Fed | POL | R.ChessArbiter | 0 |
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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: | 6 | Score vs. rated opponents: | 4.0 |
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| Average rating: | 1760 | Rating Change: | -0.09 |
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