Games played by Karsten Kostbar
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Kostbar, K | Weinhold, O | 0-1  |
34 | B76 | 1995 | SJRP-ch U13 |
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| Kostbar, K | Scholtes, M | 0-1 |
34 | C87 | 1995 | SJRP-ch U13 |
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| Kostbar, K | Flackus, S | 1-0 |
41 | C78 | 1995 | SJRP-ch U13 |
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| Kostbar, K | Baum, C | 0-1 |
38 | C17 | 1995 | SJRP-ch U13 |
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| Dang Quoc Thang, | Kostbar, K | 1-0 |
31 | E61 | 1995 | SJRP-ch U13 |
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| Lantzsch, C | Kostbar, K | 1-0 |
53 | D95 | 1995 | SJRP-ch U13 |
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| Schaefer, M | Kostbar, K | ½-½ |
17 | B40 | 1995 | SJRP-ch U13 |
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