| 1st round — 30th April 1978 |
| GM Csom, István |
 |
2510 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2450 |
 |
GM Westerinen, Heikki |
| García Padrón, José |
 |
2415 |
1 - 0 |
2620 |
 |
GM Larsen, Bent |
| GM Mariotti, Sergio |
 |
2475 |
0 - 1 |
2510 |
 |
IM Stean, Michael Francis |
| IM Medina García, Antonio Ángel |
 |
2350 |
0 - 1 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| GM Ólafsson, Friðrik |
 |
2530 |
½ - ½ |
2550 |
 |
GM Sax, Gyula |
| IM Panchenko, Alexander |
 |
2495 |
0 - 1 |
2565 |
 |
GM Miles, Anthony John |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| 1.-6. Tukmakov, Miles, Stean, Csom, Sanz Alonso, García Padrón 1; 7.-10. Sax, Ólafsson, Westerinen, Díez del Corral Rivas ½; 11.-16. Larsen, Mariotti, Panchenko, Rodríguez Vargas, Medina García, Domínguez Sanz 0; |
| 2nd round |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
0 - 1 |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| GM Larsen, Bent |
 |
2620 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| GM Mariotti, Sergio |
 |
2475 |
1 - 0 |
2495 |
 |
IM Panchenko, Alexander |
| GM Miles, Anthony John |
 |
2565 |
½ - ½ |
2570 |
 |
GM Tukmakov, Vladimir |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
0 - 1 |
2530 |
 |
GM Ólafsson, Friðrik |
| Sanz Alonso, Francisco Javier |
 |
2330 |
1 - 0 |
2510 |
 |
GM Csom, István |
| GM Sax, Gyula |
 |
2550 |
1 - 0 |
2415 |
 |
García Padrón, José |
| IM Stean, Michael Francis |
 |
2510 |
1 - 0 |
2450 |
 |
GM Westerinen, Heikki |
| 1.-2. Stean, Sanz Alonso 2; 3.-7. Sax, Tukmakov, Ólafsson, Miles, Díez del Corral Rivas 1½; 8.-11. Larsen, Csom, Mariotti, García Padrón 1; 12. Westerinen ½; 13.-16. Panchenko, Rodríguez Vargas, Medina García, Domínguez Sanz 0; |
| 3rd round |
| GM Csom, István |
 |
2510 |
0 - 1 |
2620 |
 |
GM Larsen, Bent |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2330 |
 |
Sanz Alonso, Francisco Javier |
| García Padrón, José |
 |
2415 |
½ - ½ |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| IM Medina García, Antonio Ángel |
 |
2350 |
½ - ½ |
2550 |
 |
GM Sax, Gyula |
| GM Ólafsson, Friðrik |
 |
2530 |
0 - 1 |
2565 |
 |
GM Miles, Anthony John |
| IM Panchenko, Alexander |
 |
2495 |
½ - ½ |
2510 |
 |
IM Stean, Michael Francis |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2475 |
 |
GM Mariotti, Sergio |
| GM Westerinen, Heikki |
 |
2450 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| 1.-4. Tukmakov, Miles, Stean, Sanz Alonso 2½; 5.-7. Sax, Larsen, Díez del Corral Rivas 2; 8.-10. Ólafsson, Westerinen, García Padrón 1½; 11.-12. Csom, Mariotti 1; 13.-15. Panchenko, Rodríguez Vargas, Medina García ½; 16. Domínguez Sanz 0; |
| 4th round |
| GM Larsen, Bent |
 |
2620 |
½ - ½ |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| GM Mariotti, Sergio |
 |
2475 |
½ - ½ |
2530 |
 |
GM Ólafsson, Friðrik |
| GM Miles, Anthony John |
 |
2565 |
1 - 0 |
2415 |
 |
García Padrón, José |
| IM Panchenko, Alexander |
 |
2495 |
½ - ½ |
2570 |
 |
GM Tukmakov, Vladimir |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| Sanz Alonso, Francisco Javier |
 |
2330 |
½ - ½ |
2450 |
 |
GM Westerinen, Heikki |
| GM Sax, Gyula |
 |
2550 |
½ - ½ |
2510 |
 |
GM Csom, István |
| IM Stean, Michael Francis |
 |
2510 |
½ - ½ |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| 1. Miles 3½; 2.-4. Tukmakov, Stean, Sanz Alonso 3; 5.-7. Sax, Larsen, Díez del Corral Rivas 2½; 8.-9. Ólafsson, Westerinen 2; 10.-13. Csom, Mariotti, Rodríguez Vargas, García Padrón 1½; 14. Panchenko 1; 15.-16. Medina García, Domínguez Sanz ½; |
| 5th round |
| GM Csom, István |
 |
2510 |
½ - ½ |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2550 |
 |
GM Sax, Gyula |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| García Padrón, José |
 |
2415 |
0 - 1 |
2475 |
 |
GM Mariotti, Sergio |
| IM Medina García, Antonio Ángel |
 |
2350 |
½ - ½ |
2565 |
 |
GM Miles, Anthony John |
| GM Ólafsson, Friðrik |
 |
2530 |
1 - 0 |
2495 |
 |
IM Panchenko, Alexander |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2510 |
 |
IM Stean, Michael Francis |
| GM Westerinen, Heikki |
 |
2450 |
½ - ½ |
2620 |
 |
GM Larsen, Bent |
| 1.-2. Tukmakov, Miles 4; 3.-8. Sax, Ólafsson, Stean, Larsen, Díez del Corral Rivas, Sanz Alonso 3; 9.-10. Westerinen, Mariotti 2½; 11.-12. Csom, Rodríguez Vargas 2; 13.-14. García Padrón, Domínguez Sanz 1½; 15.-16. Panchenko, Medina García 1; |
| 6th round |
| GM Larsen, Bent |
 |
2620 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| GM Mariotti, Sergio |
 |
2475 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| GM Miles, Anthony John |
 |
2565 |
½ - ½ |
2510 |
 |
GM Csom, István |
| IM Panchenko, Alexander |
 |
2495 |
1 - 0 |
2415 |
 |
García Padrón, José |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
½ - ½ |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| GM Sax, Gyula |
 |
2550 |
1 - 0 |
2450 |
 |
GM Westerinen, Heikki |
| IM Stean, Michael Francis |
 |
2510 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| GM Tukmakov, Vladimir |
 |
2570 |
½ - ½ |
2530 |
 |
GM Ólafsson, Friðrik |
| 1.-2. Tukmakov, Miles 4½; 3.-5. Sax, Stean, Larsen 4; 6.-8. Ólafsson, Mariotti, Díez del Corral Rivas 3½; 9. Sanz Alonso 3; 10.-12. Westerinen, Csom, Rodríguez Vargas 2½; 13. Panchenko 2; 14.-15. García Padrón, Domínguez Sanz 1½; 16. Medina García 1; |
| 7th round |
| GM Csom, István |
 |
2510 |
1 - 0 |
2475 |
 |
GM Mariotti, Sergio |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2565 |
 |
GM Miles, Anthony John |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
0 - 1 |
2550 |
 |
GM Sax, Gyula |
| García Padrón, José |
 |
2415 |
0 - 1 |
2570 |
 |
GM Tukmakov, Vladimir |
| IM Medina García, Antonio Ángel |
 |
2350 |
1 - 0 |
2495 |
 |
IM Panchenko, Alexander |
| GM Ólafsson, Friðrik |
 |
2530 |
½ - ½ |
2510 |
 |
IM Stean, Michael Francis |
| Sanz Alonso, Francisco Javier |
 |
2330 |
0 - 1 |
2620 |
 |
GM Larsen, Bent |
| GM Westerinen, Heikki |
 |
2450 |
½ - ½ |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| 1. Tukmakov 5½; 2.-4. Sax, Miles, Larsen 5; 5. Stean 4½; 6.-7. Ólafsson, Díez del Corral Rivas 4; 8.-9. Csom, Mariotti 3½; 10.-12. Westerinen, Rodríguez Vargas, Sanz Alonso 3; 13.-14. Panchenko, Medina García 2; 15.-16. García Padrón, Domínguez Sanz 1½; |
| 8th round |
| GM Mariotti, Sergio |
 |
2475 |
1 - 0 |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| GM Miles, Anthony John |
 |
2565 |
0 - 1 |
2450 |
 |
GM Westerinen, Heikki |
| GM Ólafsson, Friðrik |
 |
2530 |
1 - 0 |
2415 |
 |
García Padrón, José |
| IM Panchenko, Alexander |
 |
2495 |
1 - 0 |
2510 |
 |
GM Csom, István |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| GM Sax, Gyula |
 |
2550 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| IM Stean, Michael Francis |
 |
2510 |
0 - 1 |
2620 |
 |
GM Larsen, Bent |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| 1. Tukmakov 6½; 2.-3. Sax, Larsen 6; 4.-5. Ólafsson, Miles 5; 6.-7. Stean, Mariotti 4½; 8.-10. Westerinen, Díez del Corral Rivas, Rodríguez Vargas 4; 11. Csom 3½; 12.-13. Panchenko, Sanz Alonso 3; 14. Medina García 2; 15.-16. García Padrón, Domínguez Sanz 1½; |
| 9th round |
| GM Csom, István |
 |
2510 |
½ - ½ |
2570 |
 |
GM Tukmakov, Vladimir |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
0 - 1 |
2495 |
 |
IM Panchenko, Alexander |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
½ - ½ |
2565 |
 |
GM Miles, Anthony John |
| García Padrón, José |
 |
2415 |
0 - 1 |
2510 |
 |
IM Stean, Michael Francis |
| GM Larsen, Bent |
 |
2620 |
½ - ½ |
2550 |
 |
GM Sax, Gyula |
| IM Medina García, Antonio Ángel |
 |
2350 |
0 - 1 |
2530 |
 |
GM Ólafsson, Friðrik |
| Sanz Alonso, Francisco Javier |
 |
2330 |
½ - ½ |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| GM Westerinen, Heikki |
 |
2450 |
½ - ½ |
2475 |
 |
GM Mariotti, Sergio |
| 1. Tukmakov 7; 2.-3. Sax, Larsen 6½; 4. Ólafsson 6; 5.-6. Miles, Stean 5½; 7. Mariotti 5; 8.-9. Westerinen, Rodríguez Vargas 4½; 10.-12. Csom, Díez del Corral Rivas, Panchenko 4; 13. Sanz Alonso 3½; 14.-15. Medina García, Domínguez Sanz 2; 16. García Padrón 1½; |
| 10th round |
| García Padrón, José |
 |
2415 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| GM Mariotti, Sergio |
 |
2475 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| GM Miles, Anthony John |
 |
2565 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| GM Ólafsson, Friðrik |
 |
2530 |
1 - 0 |
2510 |
 |
GM Csom, István |
| IM Panchenko, Alexander |
 |
2495 |
0 - 1 |
2450 |
 |
GM Westerinen, Heikki |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
½ - ½ |
2620 |
 |
GM Larsen, Bent |
| IM Stean, Michael Francis |
 |
2510 |
1 - 0 |
2550 |
 |
GM Sax, Gyula |
| GM Tukmakov, Vladimir |
 |
2570 |
½ - ½ |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| 1. Tukmakov 7½; 2.-3. Ólafsson, Larsen 7; 4.-6. Sax, Miles, Stean 6½; 7. Mariotti 6; 8. Westerinen 5½; 9. Rodríguez Vargas 5; 10. Díez del Corral Rivas 4½; 11.-12. Csom, Panchenko 4; 13. Sanz Alonso 3½; 14. García Padrón 2½; 15.-16. Medina García, Domínguez Sanz 2; |
| 11th round |
| GM Csom, István |
 |
2510 |
1 - 0 |
2415 |
 |
García Padrón, José |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2530 |
 |
GM Ólafsson, Friðrik |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
0 - 1 |
2495 |
 |
IM Panchenko, Alexander |
| GM Larsen, Bent |
 |
2620 |
0 - 1 |
2565 |
 |
GM Miles, Anthony John |
| IM Medina García, Antonio Ángel |
 |
2350 |
0 - 1 |
2510 |
 |
IM Stean, Michael Francis |
| Sanz Alonso, Francisco Javier |
 |
2330 |
0 - 1 |
2475 |
 |
GM Mariotti, Sergio |
| GM Sax, Gyula |
 |
2550 |
1 - 0 |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| GM Westerinen, Heikki |
 |
2450 |
½ - ½ |
2570 |
 |
GM Tukmakov, Vladimir |
| 1. Tukmakov 8; 2.-5. Sax, Ólafsson, Miles, Stean 7½; 6.-7. Larsen, Mariotti 7; 8. Westerinen 6; 9.-12. Csom, Díez del Corral Rivas, Panchenko, Rodríguez Vargas 5; 13. Sanz Alonso 3½; 14. García Padrón 2½; 15.-16. Medina García, Domínguez Sanz 2; |
| 12th round |
| García Padrón, José |
 |
2415 |
½ - ½ |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| GM Mariotti, Sergio |
 |
2475 |
½ - ½ |
2620 |
 |
GM Larsen, Bent |
| IM Medina García, Antonio Ángel |
 |
2350 |
0 - 1 |
2510 |
 |
GM Csom, István |
| GM Miles, Anthony John |
 |
2565 |
½ - ½ |
2550 |
 |
GM Sax, Gyula |
| GM Ólafsson, Friðrik |
 |
2530 |
½ - ½ |
2450 |
 |
GM Westerinen, Heikki |
| IM Panchenko, Alexander |
 |
2495 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| IM Stean, Michael Francis |
 |
2510 |
1 - 0 |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| 1. Tukmakov 9; 2. Stean 8½; 3.-5. Sax, Ólafsson, Miles 8; 6.-7. Larsen, Mariotti 7½; 8. Westerinen 6½; 9.-10. Csom, Panchenko 6; 11. Díez del Corral Rivas 5½; 12. Rodríguez Vargas 5; 13. Sanz Alonso 3½; 14. García Padrón 3; 15.-16. Medina García, Domínguez Sanz 2; |
| 13th round |
| GM Csom, István |
 |
2510 |
1 - 0 |
2510 |
 |
IM Stean, Michael Francis |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
1 - 0 |
2350 |
 |
IM Medina García, Antonio Ángel |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
0 - 1 |
2530 |
 |
GM Ólafsson, Friðrik |
| GM Larsen, Bent |
 |
2620 |
½ - ½ |
2495 |
 |
IM Panchenko, Alexander |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
1 - 0 |
2565 |
 |
GM Miles, Anthony John |
| Sanz Alonso, Francisco Javier |
 |
2330 |
½ - ½ |
2570 |
 |
GM Tukmakov, Vladimir |
| GM Sax, Gyula |
 |
2550 |
½ - ½ |
2475 |
 |
GM Mariotti, Sergio |
| GM Westerinen, Heikki |
 |
2450 |
1 - 0 |
2415 |
 |
García Padrón, José |
| 1. Tukmakov 9½; 2. Ólafsson 9; 3.-4. Sax, Stean 8½; 5.-7. Miles, Larsen, Mariotti 8; 8. Westerinen 7½; 9. Csom 7; 10.-11. Díez del Corral Rivas, Panchenko 6½; 12. Rodríguez Vargas 6; 13. Sanz Alonso 4; 14. García Padrón 3; 15.-16. Medina García, Domínguez Sanz 2; |
| 14th round |
| GM Csom, István |
 |
2510 |
1 - 0 |
2490 |
 |
GM Díez del Corral Rivas, Jesús |
| García Padrón, José |
 |
2415 |
½ - ½ |
2285 |
 |
Domínguez Sanz, Juan Pedro |
| GM Mariotti, Sergio |
 |
2475 |
½ - ½ |
2485 |
 |
IM Rodríguez Vargas, Orestes |
| IM Medina García, Antonio Ángel |
 |
2350 |
0 - 1 |
2450 |
 |
GM Westerinen, Heikki |
| GM Ólafsson, Friðrik |
 |
2530 |
1 - 0 |
2330 |
 |
Sanz Alonso, Francisco Javier |
| IM Panchenko, Alexander |
 |
2495 |
0 - 1 |
2550 |
 |
GM Sax, Gyula |
| IM Stean, Michael Francis |
 |
2510 |
½ - ½ |
2565 |
 |
GM Miles, Anthony John |
| GM Tukmakov, Vladimir |
 |
2570 |
1 - 0 |
2620 |
 |
GM Larsen, Bent |
| 1. Tukmakov 10½; 2. Ólafsson 10; 3. Sax 9½; 4. Stean 9; 5.-7. Miles, Westerinen, Mariotti 8½; 8.-9. Larsen, Csom 8; 10.-12. Díez del Corral Rivas, Panchenko, Rodríguez Vargas 6½; 13. Sanz Alonso 4; 14. García Padrón 3½; 15. Domínguez Sanz 2½; 16. Medina García 2; |
| 15th round |
| GM Díez del Corral Rivas, Jesús |
 |
2490 |
½ - ½ |
2510 |
 |
IM Stean, Michael Francis |
| Domínguez Sanz, Juan Pedro |
 |
2285 |
0 - 1 |
2350 |
 |
IM Medina García, Antonio Ángel |
| GM Larsen, Bent |
 |
2620 |
1 - 0 |
2530 |
 |
GM Ólafsson, Friðrik |
| GM Miles, Anthony John |
 |
2565 |
1 - 0 |
2475 |
 |
GM Mariotti, Sergio |
| IM Rodríguez Vargas, Orestes |
 |
2485 |
½ - ½ |
2495 |
 |
IM Panchenko, Alexander |
| Sanz Alonso, Francisco Javier |
 |
2330 |
½ - ½ |
2415 |
 |
García Padrón, José |
| GM Sax, Gyula |
 |
2550 |
1 - 0 |
2570 |
 |
GM Tukmakov, Vladimir |
| GM Westerinen, Heikki |
 |
2450 |
½ - ½ |
2510 |
 |
GM Csom, István |
| 1.-2. Sax, Tukmakov 10½; 3. Ólafsson 10; 4.-5. Miles, Stean 9½; 6.-7. Larsen, Westerinen 9; 8.-9. Csom, Mariotti 8½; 10.-12. Díez del Corral Rivas, Panchenko, Rodríguez Vargas 7; 13. Sanz Alonso 4½; 14. García Padrón 4; 15. Medina García 3; 16. Domínguez Sanz 2½; |