White | Elo | Black | Elo | ECO | Year | Res. | # | | | |
Cordovil, Joao Maria
|
|
Hartston, William R
|
|
A10
|
1969
|
0-1
| 25 |
|
|
|
Timman, Jan H
|
|
Hartston, William R
|
|
A10
|
1972
|
1-0
| 38 |
|
|
|
Rajkovic, Dusan
|
|
Hartston, William R
|
|
A10
|
1973
|
½-½
| 16 |
|
|
|
Basman, Michael J
|
|
Hartston, William R
|
|
A10
|
1974
|
0-1
| 31 |
|
|
|
Fernandez Gonzalez, Ju...
|
2370
|
Hartston, William R
|
2445
|
A10
|
1976
|
0-1
| 32 |
|
|
|
Speelman, Jonathan S
|
2470
|
Hartston, William R
|
2485
|
A10
|
1979
|
1-0
| 42 |
|
|
|
Cummings, David H
|
2265
|
Hartston, William R
|
2465
|
A10
|
1980
|
0-1
| 43 |
|
|
|