Šachoví veľmajstri
Costigan, Richard
5 partii
| Biely |
Čierny |
Miesto |
Čas |
Výsledok |
| Fedorowicz, John P |
Costigan, Richard |
Philadelphia |
1986 |
½-½ |
| Ehlvest, Jaan |
Costigan, Richard |
Philadelphia |
1995 |
1-0 |
| Seirawan, Yasser |
Costigan, Richard |
Columbus |
1977 |
1-0 |
| Ibragimov, Ildar |
Costigan, Richard |
Philadelphia |
1995 |
½-½ |
| Byrne, Robert E |
Costigan, Richard |
Philadelphia |
1990 |
½-½ |