Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. M Leskiewicz vs Shulman |
 | 1-0 | 32 | 1995 | 12th Katowice Open | E81 King's Indian, Samisch |
2. M Leskiewicz vs Romanishin |
| ½-½ | 53 | 1995 | 12th Katowice Open | E17 Queen's Indian |
3. D Paz Ladron de Guevara vs M Leskiewicz |
| 0-1 | 39 | 1995 | Wch U16 | B92 Sicilian, Najdorf, Opocensky Variation |
4. M Leskiewicz vs Kasimdzhanov |
| 0-1 | 41 | 1995 | Wch U16 | D43 Queen's Gambit Declined Semi-Slav |
5. H Stevic vs M Leskiewicz |
| 1-0 | 29 | 1996 | Wch U18 | B22 Sicilian, Alapin |
6. T Reilly vs M Leskiewicz |
| 0-1 | 37 | 1998 | Australian Ch | E81 King's Indian, Samisch |
7. N Kagan vs M Leskiewicz |
| 0-1 | 34 | 1998 | Melbourne Black Opal | E69 King's Indian, Fianchetto, Classical Main line |
8. M Leskiewicz vs M Kobalia |
 | 0-1 | 20 | 1998 | World Junior Championship | A80 Dutch |
9. M Leskiewicz vs Pham Minh Hoang |
| ½-½ | 49 | 1999 | Budapest First Saturday IM04 B | A65 Benoni, 6.e4 |
10. M Bodrogi vs M Leskiewicz |
| 0-1 | 43 | 1999 | Budapest First Saturday IM04 B | A07 King's Indian Attack |
11. M Leskiewicz vs E N Cooke |
| 0-1 | 35 | 1999 | Budapest First Saturday IM04 B | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
12. L Eperjesi vs M Leskiewicz |
| 1-0 | 42 | 1999 | Budapest First Saturday IM04 B | E61 King's Indian |
13. M Leskiewicz vs G Khechumyan |
| 1-0 | 40 | 1999 | Budapest First Saturday IM04 B | D85 Grunfeld |
14. A Schneider vs M Leskiewicz |
| 1-0 | 31 | 1999 | Budapest First Saturday IM04 B | E81 King's Indian, Samisch |
15. M Leskiewicz vs C Serrer |
| 0-1 | 77 | 1999 | Budapest First Saturday IM04 B | D18 Queen's Gambit Declined Slav, Dutch |
16. T Dolgener vs M Leskiewicz |
| ½-½ | 27 | 1999 | Budapest First Saturday IM04 B | B90 Sicilian, Najdorf |
17. M Leskiewicz vs E Kahn |
 | 0-1 | 24 | 1999 | Budapest First Saturday IM04 B | A52 Budapest Gambit |
18. G Jamrich vs M Leskiewicz |
| 0-1 | 44 | 1999 | Budapest First Saturday IM04 B | B22 Sicilian, Alapin |
19. Neverov vs M Leskiewicz |
| 1-0 | 40 | 1999 | MK Cafe Cup-B | E60 King's Indian Defense |
20. Gleizerov vs M Leskiewicz |
| 1-0 | 41 | 1999 | MK Cafe Cup-B | D11 Queen's Gambit Declined Slav |
21. S Williams vs M Leskiewicz |
| 1-0 | 40 | 1999 | Wch U20 | A26 English |
22. M Leskiewicz vs T Gelashvili |
| 0-1 | 32 | 1999 | Wichern op 5th | B01 Scandinavian |