| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. S Halkias vs B Thorfinnsson |
| ½-½ | 46 | 1992 | Wch U12 | E12 Queen's Indian |
| 2. S Halkias vs T Gelashvili |
| 0-1 | 25 | 1998 | GRE-chT | E12 Queen's Indian |
| 3. S Halkias vs M Labollita |
| 1-0 | 20 | 1999 | World Junior Championship | E12 Queen's Indian |
| 4. S Halkias vs S Bohnenblust |
| 1-0 | 35 | 1999 | European Junior Championship | E12 Queen's Indian |
| 5. S Halkias vs I Karkanaqe |
| 1-0 | 40 | 2000 | Yerevan Zonal | E12 Queen's Indian |
| 6. S Halkias vs A Anastasian |
| ½-½ | 53 | 2000 | Yerevan Zonal | E12 Queen's Indian |
| 7. S Halkias vs K Nikolaidis |
| 1-0 | 34 | 2001 | Ano Liosia Open 2000/01 | E12 Queen's Indian |
| 8. S Halkias vs P Genov |
| 1-0 | 27 | 2001 | Patras Open | E12 Queen's Indian |
| 9. S Halkias vs J Asik |
| 1-0 | 43 | 2001 | Kavala Open | E12 Queen's Indian |
| 10. S Halkias vs M Mchedlishvili |
| ½-½ | 31 | 2001 | European Team Championship | E12 Queen's Indian |
| 11. S Halkias vs M Mchedlishvili |
| 0-1 | 44 | 2002 | Bled Olympiad | E12 Queen's Indian |
| 12. S Halkias vs E Ahmed |
 | 1-0 | 32 | 2003 | X Anibal Open | E12 Queen's Indian |
| 13. S Halkias vs O Cvitan |
| ½-½ | 19 | 2003 | European Team Championship | E12 Queen's Indian |
| 14. S Halkias vs E Romanov |
| 1-0 | 49 | 2005 | Aeroflot Open-B | E12 Queen's Indian |
| 15. S Halkias vs Rozentalis |
| ½-½ | 40 | 2005 | Athens Acropolis GM | E12 Queen's Indian |
| 16. S Halkias vs B Socko |
| ½-½ | 79 | 2005 | Athens Acropolis GM | E12 Queen's Indian |
| 17. S Halkias vs E Alekseev |
| ½-½ | 43 | 2007 | Aeroflot Open | E12 Queen's Indian |
| 18. S Halkias vs E Shaposhnikov |
| 1-0 | 34 | 2007 | Aeroflot Open | E12 Queen's Indian |
| 19. S Halkias vs Z Medvegy |
| ½-½ | 38 | 2007 | Bundesliga 2007/08 | E12 Queen's Indian |
| 20. S Halkias vs M Roiz |
| ½-½ | 69 | 2008 | European Championship | E12 Queen's Indian |
| 21. S Halkias vs G Milos |
| 1-0 | 52 | 2010 | World Team Championship | E12 Queen's Indian |
Kibitzing
