India
Male
FIDE ID:
Chatterjee Koustav
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NY Marshall Winter GM B | 01/14/2026 | 2386 |  United States |
| Pan-Am Intercollegiate | 01/02/2026 | 2335 | United States |
| 35th North American Open | 12/26/2025 | 2290 | United States |
| US Chess Masters 2025 | 11/26/2025 | 2327 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| A06 | Reti opening | 13 games |
| A07 | Reti, King's Indian attack (Barcza system) | 6 games |
| A13 | English opening | 6 games |
| A15 | English, 1...Nf6 (Anglo-Indian defense) | 5 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C50 | King's pawn game | 11 games |
| D38 | Queen's Gambit Declined, Ragozin variation | 7 games |
| C88 | Ruy Lopez, closed | 7 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 7 games |
