| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 426. W Pietzsch vs N Padevsky |
| 0-1 | 40 | 1966 | Czechoslovak Championship (International) | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 427. Kavalek vs W Pietzsch |
| ½-½ | 36 | 1966 | Czechoslovak Championship (International) | A30 English, Symmetrical |
| 428. V Ciocaltea vs W Pietzsch |
| 1-0 | 40 | 1966 | Czechoslovak Championship (International) | A07 King's Indian Attack |
| 429. W Pietzsch vs E Jimenez Zerquera |
| ½-½ | 29 | 1966 | Czechoslovak Championship (International) | C77 Ruy Lopez |
| 430. B Malich vs W Pietzsch |
| ½-½ | 15 | 1966 | Czechoslovak Championship (International) | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 431. W Pietzsch vs E Nowak |
| 1-0 | 41 | 1966 | Czechoslovak Championship (International) | C98 Ruy Lopez, Closed, Chigorin |
| 432. J Augustin vs W Pietzsch |
| ½-½ | 22 | 1966 | Czechoslovak Championship (International) | E60 King's Indian Defense |
| 433. W Pietzsch vs Taimanov |
| ½-½ | 53 | 1966 | Czechoslovak Championship (International) | A49 King's Indian, Fianchetto without c4 |
| 434. F Pithart vs W Pietzsch |
| ½-½ | 14 | 1966 | Czechoslovak Championship (International) | D59 Queen's Gambit Declined, Tartakower |
| 435. W Pietzsch vs Hort |
 | 0-1 | 24 | 1966 | Czechoslovak Championship (International) | B03 Alekhine's Defense |
| 436. W Pietzsch vs Jansa |
| 0-1 | 35 | 1966 | Czechoslovak Championship (International) | C89 Ruy Lopez, Marshall |
| 437. Filip vs W Pietzsch |
| 1-0 | 33 | 1966 | Czechoslovak Championship (International) | A44 Old Benoni Defense |
| 438. W Pietzsch vs J Gromek |
| 1-0 | 35 | 1966 | DSV Tournament | A43 Old Benoni |
| 439. H Liebert vs W Pietzsch |
| ½-½ | 30 | 1966 | DSV Tournament | A02 Bird's Opening |
| 440. W Pietzsch vs E Haag |
| ½-½ | 23 | 1966 | DSV Tournament | D97 Grunfeld, Russian |
| 441. J Fichtl vs W Pietzsch |
| ½-½ | 41 | 1966 | DSV Tournament | C15 French, Winawer |
| 442. W Pietzsch vs G Moehring |
| 1-0 | 55 | 1966 | DSV Tournament | E60 King's Indian Defense |
| 443. R Fuchs vs W Pietzsch |
| ½-½ | 27 | 1966 | DSV Tournament | C16 French, Winawer |
| 444. W Pietzsch vs D Marovic |
| 0-1 | 42 | 1966 | DSV Tournament | A07 King's Indian Attack |
| 445. V Ciocaltea vs W Pietzsch |
| 1-0 | 20 | 1966 | DSV Tournament | C18 French, Winawer |
| 446. W Pietzsch vs Antoshin |
| ½-½ | 26 | 1966 | DSV Tournament | E03 Catalan, Open |
| 447. W Pietzsch vs I Nei |
| 0-1 | 44 | 1966 | DSV Tournament | C98 Ruy Lopez, Closed, Chigorin |
| 448. Uhlmann vs W Pietzsch |
| ½-½ | 42 | 1966 | DSV Tournament | D53 Queen's Gambit Declined |
| 449. W Pietzsch vs A Hennings |
| ½-½ | 51 | 1966 | DSV Tournament | A07 King's Indian Attack |
| 450. L Zinn vs W Pietzsch |
| 0-1 | 45 | 1966 | DSV Tournament | C16 French, Winawer |
Kibitzing
