| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. J Koscielski vs D Steinhagen |
| 1-0 | 36 | 2001 | 12th Süder Sommerpokal | B15 Caro-Kann |
| 52. N Niebius vs J Koscielski |
| 0-1 | 41 | 2001 | 12th Süder Sommerpokal | A07 King's Indian Attack |
| 53. J Koscielski vs L Konietzka |
| 1-0 | 27 | 2001 | 12th Süder Sommerpokal | B32 Sicilian |
| 54. K Podzielny vs J Koscielski |
| 1-0 | 41 | 2001 | 12th Süder Sommerpokal | A01 Nimzovich-Larsen Attack |
| 55. J Koscielski vs H Pusch |
| 1-0 | 47 | 2001 | 12th Süder Sommerpokal | C03 French, Tarrasch |
| 56. K Bischoff vs J Koscielski |
| 0-1 | 47 | 2001 | 12th Süder Sommerpokal | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 57. J Koscielski vs R Mainka |
| ½-½ | 59 | 2001 | 12th Süder Sommerpokal | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 58. J Koscielski vs H Haselhorst |
| 1-0 | 34 | 2001 | Sportland NRW Cup | B15 Caro-Kann |
| 59. C Lingnau vs J Koscielski |
| 1-0 | 27 | 2001 | Sportland NRW Cup | E63 King's Indian, Fianchetto, Panno Variation |
| 60. J Koscielski vs I Ibragimov |
| 0-1 | 64 | 2001 | Sportland NRW Cup | C46 Three Knights |
| 61. M Saltaev vs J Koscielski |
| 1-0 | 38 | 2001 | Sportland NRW Cup | B90 Sicilian, Najdorf |
| 62. J Koscielski vs Epishin |
| 0-1 | 27 | 2001 | Bayern-chI Bank Hofmann 5th | B42 Sicilian, Kan |
| 63. J Koscielski vs P Haba |
| 0-1 | 37 | 2002 | Datteln | C49 Four Knights |
| 64. P Haba vs J Koscielski |
| 1-0 | 48 | 2002 | Datteln | E80 King's Indian, Samisch Variation |
| 65. P Haba vs J Koscielski |
| 1-0 | 45 | 2002 | Schleusen IM 4th | E81 King's Indian, Samisch |
| 66. J Koscielski vs P Haba |
 | 0-1 | 53 | 2002 | Schleusen IM 4th | C49 Four Knights |
| 67. T Henrichs vs J Koscielski |
| 1-0 | 41 | 2002 | Julian Borowski-C 4th | E80 King's Indian, Samisch Variation |
| 68. J Koscielski vs T Henrichs |
| 0-1 | 33 | 2003 | Herne Laufer op | B63 Sicilian, Richter-Rauzer Attack |
| 69. Rozentalis vs J Koscielski |
| 1-0 | 50 | 2003 | Bad Wiessee Open | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 70. J Koscielski vs R Mainka |
| 1-0 | 33 | 2003 | Bad Wiessee Open | B42 Sicilian, Kan |
| 71. J Koscielski vs F Doettling |
| 0-1 | 40 | 2003 | Bad Wiessee Open | B18 Caro-Kann, Classical |
| 72. G Meins vs J Koscielski |
| 1-0 | 46 | 2003 | Bad Wiessee Open | A80 Dutch |
| 73. J Koscielski vs S Krivoshey |
| ½-½ | 43 | 2004 | Bad Woerishofen op 20th | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 74. T Henrichs vs J Koscielski |
| 1-0 | 34 | 2004 | Laufer op | A04 Reti Opening |
| 75. J Koscielski vs V Malakhatko |
| 0-1 | 53 | 2005 | Bad Zwesten op 9th | C07 French, Tarrasch |
Kibitzing
