| Name: | Marc Mastalerz |
| Federation: |  |
| Years: | 2004 - 2004 |
| Total Games: | 9 |
| Wins: | 4 (44.44 %) |
| Draws: | 0 (0 %) |
| Losses: | 5 (55.56 %) |
| Score: | 44.44 % |
| Tournament | Date | Elo Avg. | Country |
| BEL-ch U10 | 04/07/2004 | 68 |  Belgium |
| ECO | Opening | Games |
| A25 | English, Sicilian reversed | 3 games |
| A21 | English opening | 1 games |
| A22 | English opening | 1 games |
| ECO | Opening | Games |
| A11 | English, Caro-Kann defensive system | 1 games |
| C01 | French, exchange variation | 1 games |
| D00 | Queen's pawn game | 1 games |
| C02 | French, advance variation | 1 games |
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Mastalerz, M | Schomers, P | 1-0  |
14 | A22 | 2004 | BEL-ch U10 |
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| Mastalerz, M | De Loor, J | 1-0 |
35 | A21 | 2004 | BEL-ch U10 |
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| Wouters, J | Mastalerz, M | 1-0 |
24 | C02 | 2004 | BEL-ch U10 |
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| Mastalerz, M | Lagae, F | 0-1 |
30 | A25 | 2004 | BEL-ch U10 |
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| Van den Heede, D | Mastalerz, M | 1-0 |
25 | D00 | 2004 | BEL-ch U10 |
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| Mastalerz, M | De Mul, J | 1-0 |
34 | A25 | 2004 | BEL-ch U10 |
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| Demblon, C | Mastalerz, M | 1-0 |
8 | C01 | 2004 | BEL-ch U10 |
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| Mastalerz, M | Barbe, R | 1-0 |
21 | A25 | 2004 | BEL-ch U10 |
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| Godart, F | Mastalerz, M | 1-0 |
17 | A11 | 2004 | BEL-ch U10 |
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