Pedros Santos Isain
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Atlantida | ??/??/1960 | 0 | Argentina |
| Montevideo | ??/??/1956 | 0 | Uruguay |
| Montevideo | ??/??/1941 | 0 | Uruguay |
Most Played Openings as White
| ECO | Opening | Games |
| E00 | Queen's pawn game | 1 games |
| E89 | King's Indian, Saemisch, orthodox main line | 1 games |
| E87 | King's Indian, Saemisch, orthodox, 7.d5 | 1 games |
| B99 | Sicilian, Najdorf, 7...Be7 main line | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| E19 | Queen's Indian, old main line, 9.Qxc3 | 3 games |
| C87 | Ruy Lopez, closed, Averbach variation | 1 games |
| E51 | Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5 | 1 games |
| A28 | English, four knights system | 1 games |


Argentina
Uruguay