| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 326. K Thorsteins vs Kotronias |
| 0-1 | 42 | 1992 | Reykjavik | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 327. T Thorhallsson vs K Thorsteins |
| ½-½ | 44 | 1992 | Reykjavik | B04 Alekhine's Defense, Modern |
| 328. K Thorsteins vs S Conquest |
| 1-0 | 78 | 1992 | Reykjavik | A21 English |
| 329. Shirov vs K Thorsteins |
| ½-½ | 26 | 1992 | Reykjavik | D17 Queen's Gambit Declined Slav |
| 330. K Thorsteins vs Plaskett |
| 0-1 | 67 | 1992 | Reykjavik | A21 English |
| 331. K Thorsteins vs Gulko |
| ½-½ | 63 | 1993 | Saint Martin Open | D86 Grunfeld, Exchange |
| 332. J Waitzkin vs K Thorsteins |
| 0-1 | 31 | 1993 | Saint Martin Open | B64 Sicilian, Richter-Rauzer Attack |
| 333. K Thorsteins vs A Frolov |
| 1-0 | 62 | 1993 | World Team Championship | E73 King's Indian |
| 334. J Costa vs K Thorsteins |
| 0-1 | 38 | 1993 | World Team Championship | D12 Queen's Gambit Declined Slav |
| 335. K Thorsteins vs W Li |
| ½-½ | 36 | 1993 | World Team Championship | A18 English, Mikenas-Carls |
| 336. K Thorsteins vs W Arencibia Rodriguez |
| 1-0 | 58 | 1993 | World Team Championship | E73 King's Indian |
| 337. L Christiansen vs K Thorsteins |
| ½-½ | 18 | 1993 | World Team Championship | D18 Queen's Gambit Declined Slav, Dutch |
| 338. K Thorsteins vs Hjartarson |
| 0-1 | 37 | 1994 | EUCup Gr1 | E21 Nimzo-Indian, Three Knights |
| 339. D Ruzele vs K Thorsteins |
| 1-0 | 41 | 1994 | EUCup final | D17 Queen's Gambit Declined Slav |
| 340. K Thorsteins vs Timoshenko |
| 0-1 | 33 | 1994 | 10th ECC final | E90 King's Indian |
| 341. Lobron vs K Thorsteins |
| ½-½ | 23 | 1995 | EUCup Gr1 | D19 Queen's Gambit Declined Slav, Dutch |
| 342. K Thorsteins vs A Greenfeld |
| 0-1 | 24 | 1996 | ISL-ISR | D20 Queen's Gambit Accepted |
| 343. K Thorsteins vs B Jonasson |
| 1-0 | 25 | 1996 | ISL Team Ch | A04 Reti Opening |
| 344. A Greenfeld vs K Thorsteins |
| ½-½ | 19 | 1996 | ISL-ISR | D47 Queen's Gambit Declined Semi-Slav |
| 345. J Agustsson vs K Thorsteins |
| ½-½ | 59 | 1998 | ISL-chT 9798 | B07 Pirc |
| 346. K Thorsteins vs S Kristjansson |
| 0-1 | 44 | 2012 | TCh-ISL -13 | A28 English |
| 347. K Thorsteins vs D Ragnarsson |
| 0-1 | 52 | 2017 | ISL-chT Div 1 2017/18 | A28 English |
Kibitzing
