| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 201. G Siegel vs P Ostermeyer |
| ½-½ | 30 | 1985 | Bundesliga 1984/85 | A28 English |
| 202. P Ostermeyer vs V Ruehrig |
| 1-0 | 32 | 1985 | Bundesliga 8485 | D27 Queen's Gambit Accepted, Classical |
| 203. D Barlov vs P Ostermeyer |
| 1-0 | 33 | 1985 | Biel Master Open | A46 Queen's Pawn Game |
| 204. M Feist vs P Ostermeyer |
| 0-1 | 18 | 1986 | Dortmund Open | B92 Sicilian, Najdorf, Opocensky Variation |
| 205. P Meister vs P Ostermeyer |
| ½-½ | 23 | 1986 | Dortmund Open | E11 Bogo-Indian Defense |
| 206. R Mainka vs P Ostermeyer |
| ½-½ | 55 | 1986 | Dortmund Open | B90 Sicilian, Najdorf |
| 207. P Ostermeyer vs K Berg |
| 0-1 | 29 | 1986 | Dortmund Open | A57 Benko Gambit |
| 208. P Ostermeyer vs K Schlenga |
| 1-0 | 32 | 1986 | Dortmund Open | D16 Queen's Gambit Declined Slav |
| 209. Short vs P Ostermeyer |
| 1-0 | 43 | 1986 | Solingen | B29 Sicilian, Nimzovich-Rubinstein |
| 210. Huebner vs P Ostermeyer |
| 1-0 | 40 | 1986 | Solingen | B92 Sicilian, Najdorf, Opocensky Variation |
| 211. P Ostermeyer vs R Borngaesser |
| ½-½ | 26 | 1986 | Solingen | A80 Dutch |
| 212. P Ostermeyer vs Kavalek |
| ½-½ | 14 | 1986 | Solingen | C95 Ruy Lopez, Closed, Breyer |
| 213. P Ostermeyer vs Westerinen |
| ½-½ | 37 | 1986 | Solingen | D68 Queen's Gambit Declined, Orthodox Defense, Classical |
| 214. B Schneider vs P Ostermeyer |
| ½-½ | 16 | 1986 | Solingen | A20 English |
| 215. P Ostermeyer vs Spassky |
| ½-½ | 20 | 1986 | Solingen | C95 Ruy Lopez, Closed, Breyer |
| 216. L Brunner vs P Ostermeyer |
| 1-0 | 70 | 1986 | Solingen | A00 Uncommon Opening |
| 217. P Ostermeyer vs G Capelan |
| 1-0 | 57 | 1986 | Solingen | B42 Sicilian, Kan |
| 218. P Ostermeyer vs R Lau |
 | 0-1 | 35 | 1986 | Solingen | E15 Queen's Indian |
| 219. J Sunye Neto vs P Ostermeyer |
| 0-1 | 36 | 1986 | Solingen | A20 English |
| 220. G Hertneck vs P Ostermeyer |
| ½-½ | 46 | 1987 | Bundesliga 1987/88 | A43 Old Benoni |
| 221. P Ostermeyer vs J Fedorowicz |
| 0-1 | 41 | 1988 | Cologne (Germany) | B50 Sicilian |
| 222. L Christiansen vs P Ostermeyer |
| ½-½ | 11 | 1988 | Cologne (Germany) | E11 Bogo-Indian Defense |
| 223. P Ostermeyer vs M Glienke |
| ½-½ | 75 | 1988 | Bundesliga 1987/88 | B50 Sicilian |
| 224. P Ostermeyer vs L Christiansen |
| 0-1 | 65 | 1989 | Deutschland Cup | B06 Robatsch |
| 225. V Beim vs P Ostermeyer |
| 1-0 | 66 | 1991 | Porz op 26th | A00 Uncommon Opening |
Kibitzing
