| Name: | J. Kostalek |
| Federation: |  |
| Years: | 1998 - 1998 |
| Total Games: | 8 |
| Wins: | 1 (12.5 %) |
| Draws: | 1 (12.5 %) |
| Losses: | 6 (75 %) |
| Score: | 18.75 % |
| Tournament | Date | Elo Avg. | Country |
| CZE-chMa U16 | 10/??/1998 | 58 |  Czech Republic |
| ECO | Opening | Games |
| B11 | Caro-Kann, two knights, 3...Bg4 | 1 games |
| B18 | Caro-Kann, classical variation | 1 games |
| A13 | English opening | 1 games |
| C01 | French, exchange variation | 1 games |
| ECO | Opening | Games |
| C57 | Two knights defence | 1 games |
| C53 | Giuoco Piano | 1 games |
| E91 | King's Indian, 6.Be2 | 1 games |
| C23 | Bishop's opening | 1 games |
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Kostalek, J | Hurt, L | 0-1  |
57 | B11 | 1998 | CZE-chMa U16 |
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| Kostalek, J | Vorlicek, P | 0-1 |
64 | B18 | 1998 | CZE-chMa U16 |
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| Kostalek, J | Hlavacek, K | 1-0 |
19 | A13 | 1998 | CZE-chMa U16 |
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| Kostalek, J | Cap, K | ½-½ |
39 | C01 | 1998 | CZE-chMa U16 |
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| Vacha, J | Kostalek, J | 1-0 |
9 | C57 | 1998 | CZE-chMa U16 |
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| Certik, O | Kostalek, J | 1-0 |
50 | C53 | 1998 | CZE-chMa U16 |
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| Mutl, J | Kostalek, J | 1-0 |
39 | E91 | 1998 | CZE-chMa U16 |
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| Jana, M | Kostalek, J | 1-0 |
65 | C23 | 1998 | CZE-chMa U16 |
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