| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 301. J L Arnason vs Smyslov |
| ½-½ | 39 |
1995 |
It (cat.11), Reykjavik (Iceland) | C76 Ruy Lopez, Modern Steinitz Defense, Fianchetto Variation |
| 302. J L Arnason vs Petursson |
| ½-½ | 16 |
1995 |
cat.11 | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 303. Zsofia Polgar vs J L Arnason |
| 1-0 | 40 |
1995 |
It (cat.11), Reykjavik (Iceland) | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 304. J L Arnason vs Larsen |
| 1-0 | 25 |
1995 |
Reykjavik Olafsson | B27 Sicilian |
| 305. J L Arnason vs Petursson |
| 0-1 | 80 |
1996 |
Ch Iceland tt 1995 | B75 Sicilian, Dragon, Yugoslav Attack |
| 306. J L Arnason vs J Kristinsson |
| 1-0 | 31 |
1999 |
Icelandic Teams | B42 Sicilian, Kan |
| 307. T Thorhallsson vs J L Arnason |
| ½-½ | 31 |
1999 |
Icelandic Teams | B90 Sicilian, Najdorf |
| 308. J L Arnason vs A Karason |
| 1-0 | 38 |
1999 |
Icelandic Teams | B50 Sicilian |
| 309. J L Arnason vs Hjartarson |
| 0-1 | 40 |
2000 |
Chess@iceland rapidplay Group B | C33 King's Gambit Accepted |
| 310. J L Arnason vs E Keogh |
| 1-0 | 21 |
2001 |
ECC | A25 English |
| 311. A Jakubiec vs J L Arnason |
| 1-0 | 46 |
2001 |
ECC | B42 Sicilian, Kan |
| 312. J L Arnason vs G Timoshenko |
 | 0-1 | 35 |
2001 |
ECC | A13 English |
| 313. I Miladinovic vs J L Arnason |
| ½-½ | 19 |
2001 |
ECC | E20 Nimzo-Indian |
| 314. J L Arnason vs J Vestly |
| 1-0 | 40 |
2001 |
ECC | A25 English |
| 315. M Ahn vs J L Arnason |
| ½-½ | 27 |
2001 |
ECC | B43 Sicilian, Kan, 5.Nc3 |
| 316. J L Arnason vs R Lev |
| ½-½ | 61 |
2001 |
ECC | C26 Vienna |
| 317. J L Arnason vs H Olafsson |
| ½-½ | 10 |
2004 |
Icelandic Team Championship | A07 King's Indian Attack |
| 318. G Thorhallsson vs J L Arnason |
| 0-1 | 33 |
2004 |
Icelandic Team Championship | B41 Sicilian, Kan |
| 319. A Gunnarsson vs J L Arnason |
| ½-½ | 55 |
2005 |
Icelandic Team Championship | A30 English, Symmetrical |
| 320. L E Johannessen vs J L Arnason |
| ½-½ | 56 |
2005 |
Icelandic Team Championship | E15 Queen's Indian |
| 321. J L Arnason vs B Thorsteinsson |
| 1-0 | 41 |
2005 |
Icelandic Team Championship | C90 Ruy Lopez, Closed |