1978 World Open Chess Tournament
Philadelphia USA 1978
| Date | Players | Elo Average | Games |
| Jun 30, 1978 | 4 | 2157 | 3 |
| Name | ELO | Points | ||
|
Leiggi, Louis M | 1945 | 2.5 | |
|
CM Clayton, Kenneth | 2185 | 0.5 | |
 |
IM Paolozzi, Marcos | 2304 | 0.0 | |
 |
FM Weeramantry, Sunil | 2195 | 0.0 | |
1978 World Open Chess Tournament Games
| White | Black | Result | Round | Date | Opening | View |
| Leiggi, L | Paolozzi, M | 1-0  |
1 | Jun 30, 1978 | B13 Caro-Kann, exchange variation |   |
| Leiggi, L | Weeramantry, S | 1-0 |
3 | Jul 01, 1978 | B07 Pirc defence |   |
| Leiggi, L | Clayton, K | ½-½ |
5 | Jul 02, 1978 | B24 Sicilian, closed | |
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