| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Habermann, D | Castle, K | ½-½ ![]() |
18 | A03 | 2004 | Berlin Unicorn op |
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| Castle, K | Koch, F | ½-½ ![]() |
25 | C80 | 2004 | Berlin Unicorn op |
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| Schildt, R | Castle, K | ½-½ ![]() |
24 | B20 | 2004 | Berlin Unicorn op |
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| Castle, K | Glantz, R | ½-½ ![]() |
37 | B23 | 2004 | Berlin Unicorn op |
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| Moehring, G | 2302 | Castle, K | 1-0 ![]() |
38 | E68 | 2004 | Berlin Unicorn op |
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| Castle, K | 1780 | Verfuerth, T | 2205 | 0-1 ![]() |
31 | B23 | 2003 | Goch op 14th |
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| Castle, K | 1780 | Lehmann, H | 1670 | 1-0 ![]() |
40 | B23 | 2003 | Goch op 14th |
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| Castle, K | 1780 | Klas, G | ½-½ ![]() |
20 | B12 | 2003 | Goch op 14th |
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| Riedel, H | 2220 | Castle, K | 1780 | 1-0 ![]() |
29 | E12 | 2003 | Goch op 14th |
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| Van Gemert, M | Castle, K | 1780 | 0-1 ![]() |
26 | B40 | 2003 | Goch op 14th |
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| Hoening, A | Castle, K | 1780 | ½-½ ![]() |
21 | A21 | 2003 | Goch op 14th |
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| Castle, K | Croonenborghs, T | 2202 | 0-1 ![]() |
36 | C05 | 2003 | Leuven op 15th |
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| Castle, K | Grecuccio, N | ½-½ ![]() |
20 | B23 | 2003 | Leuven op 15th |
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