| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 326. Shabalov vs A Kosten |
| ½-½ | 55 | 1988 | GMA-JAT Open | E32 Nimzo-Indian, Classical |
| 327. A Kosten vs D Nestorovic |
| 1-0 | 41 | 1988 | GMA-JAT Open | C55 Two Knights Defense |
| 328. Westerinen vs A Kosten |
| 1-0 | 26 | 1988 | GMA-JAT Open | B62 Sicilian, Richter-Rauzer |
| 329. A Kosten vs G M Todorovic |
| 1-0 | 38 | 1988 | GMA-JAT Open | B21 Sicilian, 2.f4 and 2.d4 |
| 330. I Marinkovic vs A Kosten |
| ½-½ | 17 | 1988 | GMA-JAT Open | B58 Sicilian |
| 331. A Kosten vs A Soltis |
| 1-0 | 42 | 1988 | GMA-JAT Open | B08 Pirc, Classical |
| 332. Larsen vs A Kosten |
 | 0-1 | 45 | 1988 | Hastings 1988/89 | A00 Uncommon Opening |
| 333. A Kosten vs Korchnoi |
| ½-½ | 43 | 1988 | Hastings 1988/89 | C09 French, Tarrasch, Open Variation, Main line |
| 334. Smyslov vs A Kosten |
| 0-1 | 41 | 1988 | Hastings 1988/89 | E11 Bogo-Indian Defense |
| 335. A Kosten vs E Bricard |
| 0-1 | 52 | 1989 | FRA-chT | C50 Giuoco Piano |
| 336. Adams vs A Kosten |
| ½-½ | 19 | 1989 | Paris Open-1 | B45 Sicilian, Taimanov |
| 337. D Barua vs A Kosten |
| ½-½ | 28 | 1989 | London NWYM | B58 Sicilian |
| 338. A Kosten vs O Renet |
| 0-1 | 84 | 1989 | FRA-chT | B46 Sicilian, Taimanov Variation |
| 339. P Sinkovics vs A Kosten |
| ½-½ | 68 | 1989 | Paris Open-1 | E11 Bogo-Indian Defense |
| 340. A Kosten vs S Gottuk |
| 1-0 | 32 | 1989 | Paris Open-1 | C42 Petrov Defense |
| 341. N Murshed vs A Kosten |
| 1-0 | 37 | 1989 | London NWYM | E21 Nimzo-Indian, Three Knights |
| 342. A Kosten vs Jean Brault |
| 1-0 | 35 | 1989 | FRA-chT | B06 Robatsch |
| 343. J Dubois vs A Kosten |
| 0-1 | 39 | 1989 | FRA-chT | B21 Sicilian, 2.f4 and 2.d4 |
| 344. D Chevallier vs A Kosten |
| ½-½ | 35 | 1989 | FRA-chT | B33 Sicilian |
| 345. A Kosten vs C McNab |
| 1-0 | 42 | 1989 | London NWYM | B09 Pirc, Austrian Attack |
| 346. A Kosten vs S Conquest |
| 1-0 | 28 | 1989 | London NWYM | C55 Two Knights Defense |
| 347. A Kosten vs J Levitt |
| ½-½ | 12 | 1989 | London NWYM | C02 French, Advance |
| 348. Y Guidez vs A Kosten |
| 0-1 | 40 | 1989 | FRA-chT | E11 Bogo-Indian Defense |
| 349. G Flear vs A Kosten |
| 0-1 | 32 | 1989 | FRA-chT | E12 Queen's Indian |
| 350. A Kosten vs P Herb |
| ½-½ | 41 | 1989 | FRA-chT | C24 Bishop's Opening |
Kibitzing
