| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 651. Barcza vs M Udovcic |
| 1-0 | 77 | 1967 | October Revolution 50 | A49 King's Indian, Fianchetto without c4 |
| 652. R Fuchs vs M Udovcic |
| ½-½ | 30 | 1967 | October Revolution 50 | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 653. M Udovcic vs Gufeld |
 | 0-1 | 60 | 1967 | October Revolution 50 | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 654. M Udovcic vs W Addison |
| ½-½ | 41 | 1967 | Maribor | D16 Queen's Gambit Declined Slav |
| 655. L Lengyel vs M Udovcic |
| ½-½ | 40 | 1967 | Maribor | E64 King's Indian, Fianchetto, Yugoslav System |
| 656. M Udovcic vs S Malesic |
| ½-½ | 27 | 1967 | Maribor | D32 Queen's Gambit Declined, Tarrasch |
| 657. Reshevsky vs M Udovcic |
| 1-0 | 31 | 1967 | Maribor | A96 Dutch, Classical Variation |
| 658. M Udovcic vs L Zinn |
| 0-1 | 43 | 1967 | Maribor | A14 English |
| 659. Matulovic vs M Udovcic |
| 0-1 | 56 | 1967 | Maribor | B15 Caro-Kann |
| 660. M Udovcic vs A Matanovic |
| ½-½ | 42 | 1967 | Maribor | A07 King's Indian Attack |
| 661. Pirc vs M Udovcic |
| 0-1 | 33 | 1967 | Maribor | A17 English |
| 662. M Udovcic vs L Crepinsek |
| 1-0 | 65 | 1967 | Maribor | A04 Reti Opening |
| 663. Janosevic vs M Udovcic |
| 0-1 | 40 | 1967 | Maribor | B08 Pirc, Classical |
| 664. M Udovcic vs Ivkov |
 | 0-1 | 44 | 1967 | Maribor | A41 Queen's Pawn Game (with ...d6) |
| 665. V Musil vs M Udovcic |
| ½-½ | 29 | 1967 | Maribor | C45 Scotch Game |
| 666. M Udovcic vs N Minev |
| ½-½ | 47 | 1967 | Maribor | A15 English |
| 667. M Udovcic vs Robatsch |
| 0-1 | 48 | 1967 | Maribor | D35 Queen's Gambit Declined |
| 668. Unzicker vs M Udovcic |
| ½-½ | 14 | 1967 | Maribor | B06 Robatsch |
| 669. M Udovcic vs Janosevic |
| 0-1 | 23 | 1967 | Yugoslav First League | A46 Queen's Pawn Game |
| 670. M Udovcic vs M Damjanovic |
| 0-1 | 46 | 1969 | Zagreb | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 671. M Cebalo vs M Udovcic |
| 0-1 | 63 | 1969 | Zagreb | A15 English |
| 672. M Udovcic vs D Minic |
| 1-0 | 26 | 1969 | Zagreb | A41 Queen's Pawn Game (with ...d6) |
| 673. M Bertok vs M Udovcic |
| ½-½ | 21 | 1969 | Zagreb | B06 Robatsch |
| 674. M Udovcic vs Lombardy |
| 1-0 | 35 | 1969 | Zagreb | A04 Reti Opening |
| 675. B Kurajica vs M Udovcic |
| ½-½ | 54 | 1969 | Zagreb | B06 Robatsch |
Kibitzing
