S. Ahlstrom
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| USA Masters | ??/??/1990 | 920 | United States |
| Midwest Masters op | ??/??/1989 | 816 | United States |
| Midwest Masters op | ??/??/1988 | 733 | United States |
| Philadelphia op | 07/??/1986 | 1471 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| A34 | English, symmetrical variation | 2 games |
| E77 | King's Indian, Four pawns attack, 6.Be2 | 2 games |
| D47 | Queen's Gambit Declined semi-Slav, 7.Bc4 | 2 games |
| B38 | Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B22 | Sicilian, Alapin's variation (2.c3) | 2 games |
| B20 | Sicilian defence | 1 games |
| C14 | French, classical variation | 1 games |
| B40 | Sicilian defence | 1 games |


United States