Niedzielski
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| WchT U26 prel-D 05th | 07/05/1958 | 0 |  Bulgaria |
| WchT U26 fin-B 05th | 07/09/1958 | 0 | Bulgaria |
Most Played Openings as White
| ECO | Opening | Games |
| C77 | Ruy Lopez, Morphy defence | 1 games |
| B32 | Sicilian defence | 1 games |
| B15 | Caro-Kann defence | 1 games |
| B11 | Caro-Kann, two knights, 3...Bg4 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C67 | Ruy Lopez, Berlin defence, open variation | 1 games |
| C70 | Ruy Lopez | 1 games |
| C65 | Ruy Lopez, Berlin defence | 1 games |
| A00 | Polish (Sokolsky) opening | 1 games |
