| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 501. J Trapl vs W Hartston |
| ½-½ | 13 | 1976 | Decin-A | D32 Queen's Gambit Declined, Tarrasch |
| 502. W Hartston vs A Ornstein |
| 0-1 | 68 | 1976 | Decin-A | C28 Vienna Game |
| 503. I Radulov vs W Hartston |
| ½-½ | 12 | 1976 | Decin-A | B46 Sicilian, Taimanov Variation |
| 504. W Hartston vs W Schmidt |
| ½-½ | 15 | 1976 | Decin-A | B83 Sicilian |
| 505. Jansa vs W Hartston |
| ½-½ | 18 | 1976 | Decin-A | B46 Sicilian, Taimanov Variation |
| 506. N Minev vs W Hartston |
| ½-½ | 21 | 1976 | Decin-A | A56 Benoni Defense |
| 507. W Hartston vs Alburt |
| 0-1 | 37 | 1976 | Decin-A | A14 English |
| 508. B Zuckerman vs W Hartston |
| 1-0 | 50 | 1976 | London - New York Telex Match | A07 King's Indian Attack |
| 509. W Hartston vs J Seret |
| 1-0 | 42 | 1976 | Haifa Olympiad | D11 Queen's Gambit Declined Slav |
| 510. R Sanguineti vs W Hartston |
 | ½-½ | 77 | 1976 | Haifa Olympiad | A30 English, Symmetrical |
| 511. W Hartston vs A Grinza |
| 1-0 | 32 | 1976 | Haifa Olympiad | E30 Nimzo-Indian, Leningrad |
| 512. R Balinas vs W Hartston |
| 0-1 | 50 | 1976 | Haifa Olympiad | B40 Sicilian |
| 513. J Tarjan vs W Hartston |
| ½-½ | 22 | 1976 | Haifa Olympiad | D83 Grunfeld, Grunfeld Gambit |
| 514. W Hartston vs H Ree |
| ½-½ | 24 | 1976 | Haifa Olympiad | E30 Nimzo-Indian, Leningrad |
| 515. W Hartston vs B Amos |
| 1-0 | 43 | 1976 | Haifa Olympiad | D37 Queen's Gambit Declined |
| 516. M Wahlbom vs W Hartston |
| 1-0 | 41 | 1976 | Haifa Olympiad | B46 Sicilian, Taimanov Variation |
| 517. F Hoelzl vs W Hartston |
| 0-1 | 30 | 1976 | Haifa Olympiad | B46 Sicilian, Taimanov Variation |
| 518. W Hartston vs H Pfleger |
| ½-½ | 23 | 1977 | BBC TV Master Game | A41 Queen's Pawn Game (with ...d6) |
| 519. H Pfleger vs W Hartston |
| 1-0 | 57 | 1977 | BBC TV Master Game | A36 English |
| 520. L Rellstab vs W Hartston |
| 0-1 | 45 | 1977 | Favorite Hammonia | A31 English, Symmetrical, Benoni Formation |
| 521. W Hartston vs P Dankert |
| ½-½ | 27 | 1977 | Favorite Hammonia | D37 Queen's Gambit Declined |
| 522. C Clemens vs W Hartston |
| 1-0 | 56 | 1977 | Favorite Hammonia | D78 Neo-Grunfeld, 6.O-O c6 |
| 523. W Hartston vs W Gergs |
| 1-0 | 26 | 1977 | Favorite Hammonia | D86 Grunfeld, Exchange |
| 524. H Cording vs W Hartston |
| ½-½ | 51 | 1977 | Favorite Hammonia | B83 Sicilian |
| 525. W Hartston vs W Rostalski |
| 1-0 | 49 | 1977 | Favorite Hammonia | E30 Nimzo-Indian, Leningrad |
Kibitzing
