Matthew R Katrein
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| New York State-ch | 09/01/2001 | 995 | United States |
| World op | 07/??/1991 | 1252 | United States |
| World op | 06/??/1990 | 1607 | United States |
| US op | 08/??/1982 | 2030 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| E92 | King's Indian, classical variation | 2 games |
| A21 | English opening | 2 games |
| E61 | King's Indian defence, 3.Nc3 | 1 games |
| A34 | English, symmetrical variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A96 | Dutch, classical variation | 3 games |
| B23 | Sicilian, closed | 1 games |
| A80 | Dutch | 1 games |
| B06 | Robatsch (modern) defence | 1 games |


United States