Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. M Costley vs G Lock |
| 0-1 | 36 | 1999 | Hastings Challengers 1999/00 | D15 Queen's Gambit Declined Slav |
2. G Lock vs Plaskett |
| ½-½ | 36 | 1999 | Hastings Challengers 1999/00 | A46 Queen's Pawn Game |
3. S Beshukov vs G Lock |
| 1-0 | 27 | 2000 | Hastings Challengers 1999/00 | A07 King's Indian Attack |
4. S Williams vs G Lock |
| 1-0 | 42 | 2000 | Southend op | A11 English, Caro-Kann Defensive System |
5. C Duncan vs G Lock |
| 1-0 | 52 | 2001 | South Wales Masters 7th | D37 Queen's Gambit Declined |
6. G Lock vs J Ruigrok |
| 1-0 | 33 | 2001 | Guernsey Open | E12 Queen's Indian |
7. A van der Poel vs G Lock |
| 0-1 | 32 | 2001 | Guernsey Open | C00 French Defense |
8. G Lock vs R Bellin |
| ½-½ | 21 | 2001 | Guernsey Open | E11 Bogo-Indian Defense |
9. G Lock vs A Corkett |
| 0-1 | 19 | 2001 | Guernsey Open | E11 Bogo-Indian Defense |
10. J Buchanan vs G Lock |
| 0-1 | 36 | 2001 | Guernsey Open | D13 Queen's Gambit Declined Slav, Exchange Variation |
11. K Arkell vs G Lock |
| 1-0 | 36 | 2001 | Guernsey Open | D43 Queen's Gambit Declined Semi-Slav |
12. G Lock vs K White |
 | 0-1 | 31 | 2001 | Guernsey Open | D02 Queen's Pawn Game |
13. G Lock vs E Josiah Lutton |
| 0-1 | 29 | 2002 | Southend op | A40 Queen's Pawn Game |
14. S Williams vs G Lock |
| 1-0 | 30 | 2003 | Portsmouth op | D44 Queen's Gambit Declined Semi-Slav |
15. G Lock vs F Hamperl |
| ½-½ | 23 | 2005 | Southend op | A39 English, Symmetrical, Main line with d4 |
16. S Collins vs G Lock |
| 1-0 | 42 | 2007 | Hastings 2007/08 | D15 Queen's Gambit Declined Slav |
17. G Lock vs R Ringor |
| 1-0 | 35 | 2007 | Hastings 2007/08 | A17 English |
18. J Garnett vs G Lock |
| 0-1 | 32 | 2007 | Hastings 2007/08 | D05 Queen's Pawn Game |
19. G Lock vs V Malakhatko |
 | 0-1 | 50 | 2007 | Hastings 2007/08 | D52 Queen's Gambit Declined |
20. R Norinkeviciute vs G Lock |
| ½-½ | 30 | 2008 | Hastings 2007/08 | A11 English, Caro-Kann Defensive System |
21. G Lock vs A Wilson |
| 1-0 | 26 | 2008 | Hastings 2007/08 | A15 English |
22. V Georgiev vs G Lock |
| 1-0 | 20 | 2008 | Hastings 2007/08 | D11 Queen's Gambit Declined Slav |
23. G Lock vs S Knott |
| ½-½ | 45 | 2008 | Hastings 2007/08 | A15 English |
24. G O'Toole vs G Lock |
 | 0-1 | 36 | 2008 | Hastings 2007/08 | A96 Dutch, Classical Variation |
25. G Lock vs T Rendle |
| 1-0 | 47 | 2008 | Hastings 2007/08 | A04 Reti Opening |