Games played by Chatterjee Koustav
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Sengupta, D | 2586 | Koustav, C | 2288 | ½-½  |
56 | B47 | 2018 | 16th Delhi Open 2018 |
|
| Koustav, C | 2288 | Pruijssers, R | 2536 | ½-½ |
18 | A45 | 2018 | 16th Delhi Open 2018 |
|
| Gusain, H | 2450 | Koustav, C | 2288 | 0-1 |
45 | B48 | 2018 | 16th Delhi Open 2018 |
|
| David, A | 2553 | Koustav, C | 2288 | 1-0 |
35 | B40 | 2018 | 16th Delhi Open 2018 |
|
| Koustav, C | 2288 | Karthikeyan, P | 2497 | ½-½ |
24 | A13 | 2018 | 16th Delhi Open 2018 |
|
| Koustav, C | 2108 | Deepan Chakkravarthy J., | 2466 | 0-1 |
40 | A10 | 2017 | 55th ch-IND Challengers |
|
| Nitin, S | 2421 | Koustav, C | 2108 | ½-½ |
21 | B40 | 2017 | 55th ch-IND Challengers |
|