| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 301. Dreev vs K Thorsteins |
| 1-0 | 41 | 1990 | Reykjavik Open | D87 Grunfeld, Exchange |
| 302. K Thorsteins vs Benjamin |
| ½-½ | 60 | 1990 | Reykjavik Open | E81 King's Indian, Samisch |
| 303. K Thorsteins vs A Wojtkiewicz |
 | 0-1 | 60 | 1990 | Reykjavik Open | A57 Benko Gambit |
| 304. A Ivanov vs K Thorsteins |
| 0-1 | 40 | 1990 | Reykjavik Open | B82 Sicilian, Scheveningen |
| 305. Geller vs K Thorsteins |
| 1-0 | 40 | 1990 | Reykjavik Open | B83 Sicilian |
| 306. K Thorsteins vs H Steingrimsson |
| 0-1 | 54 | 1990 | Reykjavik Open | A10 English |
| 307. K Thorsteins vs M Sharif |
| 1-0 | 29 | 1990 | Lyon Open | E92 King's Indian |
| 308. M Santo-Roman vs K Thorsteins |
| 1-0 | 38 | 1990 | Lyon Open | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 309. M Saucey vs K Thorsteins |
| 0-1 | 42 | 1990 | Lyon Open | B06 Robatsch |
| 310. K Thorsteins vs P Meinsohn |
| 1-0 | 42 | 1990 | Lyon Open | A57 Benko Gambit |
| 311. K Thorsteins vs J Orlowski |
| 1-0 | 50 | 1990 | Lyon Open | E30 Nimzo-Indian, Leningrad |
| 312. Smirin vs K Thorsteins |
| ½-½ | 43 | 1991 | Paris-ch op | B13 Caro-Kann, Exchange |
| 313. K Thorsteins vs H A Gretarsson |
| 1-0 | 37 | 1991 | ISL-ch | E97 King's Indian |
| 314. K Thorsteins vs T Thorhallsson |
| ½-½ | 24 | 1991 | ISL-ch | D43 Queen's Gambit Declined Semi-Slav |
| 315. K Thorsteins vs S Atalik |
| ½-½ | 21 | 1991 | Borsodtavho SC I | E38 Nimzo-Indian, Classical, 4...c5 |
| 316. N Luecke vs K Thorsteins |
| 0-1 | 34 | 1991 | Borsodtavho SC I | B63 Sicilian, Richter-Rauzer Attack |
| 317. K Thorsteins vs I Manor |
| ½-½ | 34 | 1991 | Borsodtavho SC I | D34 Queen's Gambit Declined, Tarrasch |
| 318. L Somlai vs K Thorsteins |
| 1-0 | 41 | 1991 | Borsodtavho SC I | B80 Sicilian, Scheveningen |
| 319. K Thorsteins vs L Vadasz |
| 1-0 | 25 | 1991 | Borsodtavho SC I | E30 Nimzo-Indian, Leningrad |
| 320. P Lukacs vs K Thorsteins |
| 1-0 | 40 | 1991 | Borsodtavho SC I | E94 King's Indian, Orthodox |
| 321. K Thorsteins vs T Luther |
| 1-0 | 53 | 1991 | Borsodtavho SC I | A19 English, Mikenas-Carls, Sicilian Variation |
| 322. R Lendwai vs K Thorsteins |
| ½-½ | 17 | 1991 | Borsodtavho SC I | B21 Sicilian, 2.f4 and 2.d4 |
| 323. K Thorsteins vs E Porper |
| ½-½ | 16 | 1991 | Borsodtavho SC I | D35 Queen's Gambit Declined |
| 324. Z Varga vs K Thorsteins |
| 1-0 | 40 | 1991 | Borsodtavho SC I | E80 King's Indian, Samisch Variation |
| 325. K Thorsteins vs M Sjoberg |
| 1-0 | 26 | 1991 | Borsodtavho SC I | A42 Modern Defense, Averbakh System |
Kibitzing
