| Kushko,Dmitriy (2449) – Kostov,Deyan Samuil (2320) |
1-0 |
Reti |
2025-11-27 |
| Kostov,Deyan Samuil (2320) – Galchenko,Matvey (2435) |
0-1 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-11-27 |
| Kostov,Deyan Samuil (2303) – Moskalenko,V1 (2423) |
1/2-1/2 |
QGD |
2025-10-02 |
| Kostov,Deyan Samuil (2303) – Zagorskis,D (2381) |
1/2-1/2 |
Nimzo-Indian |
2025-10-01 |
| Starostits,I (2317) – Kostov,Deyan Samuil (2303) |
0-1 |
Queen's gambit accepted |
2025-10-01 |
| Mamani Beltran,Deniman (2306) – Kostov,Deyan Samuil (2303) |
1-0 |
Reti |
2025-09-30 |
| Kostov,Deyan Samuil (2303) – Becerra,J (2356) |
1-0 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-09-30 |
| Kostov,Deyan Samuil (2368) – Neiksans,A (2584) |
0-1 |
Nimzo-Indian |
2025-08-17 |
| Kostov,Deyan Samuil (2368) – Valdats,Reinis (2301) |
1/2-1/2 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-08-15 |
| Kostov,Deyan Samuil (2352) – Muratov,Batyrkhan (2337) |
1-0 |
Queen's Pawn |
2025-06-17 |
| Paravyan,D (2589) – Kostov,Deyan Samuil (2352) |
1-0 |
QGA |
2025-06-17 |
| Medina,M ECU (2368) – Kostov,Deyan Samuil (2352) |
0-1 |
QGA |
2025-06-17 |
| Kostov,Deyan Samuil (2352) – Nguyen Ngoc Truong Son (2600) |
0-1 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-06-17 |
| Demchenko,A (2619) – Kostov,Deyan Samuil (2352) |
1-0 |
Queen's bishop game |
2025-06-14 |
| Kostov,Deyan Samuil (2352) – Bernadskiy,V (2497) |
0-1 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-06-12 |
| Kostov,Deyan Samuil (2352) – Safarli,E (2620) |
0-1 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-06-09 |
| Kostov,Deyan Samuil (2313) – Baum,Jonasz (2487) |
0-1 |
Nimzo-Indian |
2025-04-27 |
| Kostov,Deyan Samuil (2313) – Iermito,S (2499) |
1/2-1/2 |
QGA, Janowsky-Larsen variation |
2025-04-26 |
| Woodward,Andy (2536) – Kostov,Deyan Samuil (2313) |
1/2-1/2 |
QGA |
2025-04-26 |
| Kostov,Deyan Samuil (2313) – Matviishen,Viktor (2550) |
1/2-1/2 |
QGD |
2025-04-25 |
| Kostov,Deyan Samuil (2313) – Cuenca Jimenez,J (2487) |
1-0 |
QGD |
2025-04-23 |
| Agmanov,Zhandos (2470) – Kostov,Deyan Samuil (2313) |
1/2-1/2 |
French |
2025-04-23 |
| Dgebuadze,A (2417) – Kostov,Deyan Samuil (2347) |
1/2-1/2 |
QGA |
2025-03-15 |
| Kostov,Deyan Samuil (2347) – Ivic,Velimir (2622) |
0-1 |
King's Indian |
2025-03-15 |
| Vrolijk,Liam (2517) – Kostov,Deyan Samuil (2347) |
0-1 |
Reti opening |
2025-03-15 |
| Kostov,Deyan Samuil (2347) – Bosboom,M (2357) |
1-0 |
King's Indian |
2025-03-15 |
| Rakhmatullaev,Almas (2413) – Kostov,Deyan Samuil (2347) |
1-0 |
QGA, 4.Nc3 |
2025-03-11 |
| Kostov,Deyan Samuil (2347) – Kovalchuk,Al RUS (2304) |
1-0 |
King's Indian |
2025-03-11 |
| Kostov,Deyan Samuil (2347) – Rojas Alarcon,J (2365) |
1/2-1/2 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-03-11 |
| Garayev,Kanan (2336) – Kostov,Deyan Samuil (2347) |
1/2-1/2 |
Queen's pawn game |
2025-03-11 |
| Avila Pavas,Santiago (2511) – Kostov,Deyan Samuil (2347) |
1-0 |
Queen's bishop game |
2025-03-11 |
| Ben Artzi,I (2332) – Kostov,Deyan Samuil (2347) |
1-0 |
QGA |
2025-03-04 |
| Kostov,Deyan Samuil (2347) – Putnam,Liam (2411) |
0-1 |
King's Indian |
2025-03-04 |
| Kostov,Deyan Samuil (2347) – Kopjonkin,Kirill (2314) |
1-0 |
Trompovsky attack (Ruth, Opovcensky opening) |
2025-03-04 |
| Goryachkina,A (2548) – Kostov,Deyan Samuil (2347) |
1-0 |
Reti opening |
2025-03-04 |
| Kostov,Deyan Samuil (2347) – Pichot,A (2613) |
0-1 |
QGD |
2025-02-04 |
| Kostov,Deyan Samuil (2347) – Henriquez Villagra,C (2597) |
0-1 |
Old Indian defence |
2025-02-04 |
| Kostov,Deyan Samuil (2334) – Pikula,D (2306) |
1-0 |
Benko gambit |
2025-01-17 |
| Gundavaa,B (2515) – Kostov,Deyan Samuil (2334) |
0-1 |
QGA |
2025-01-15 |
| Kostov,Deyan Samuil (2334) – Jiang,Haochen (2352) |
1/2-1/2 |
Nimzo-Indian |
2025-01-15 |
| Kukhmazov,A (2469) – Kostov,Deyan Samuil (2334) |
1-0 |
QGA |
2025-01-07 |
| Corrales Jimenez,F (2540) – Kostov,Deyan Samuil (2334) |
1-0 |
Sicilian |
2025-01-07 |
| Kostov,Deyan Samuil (2334) – Paravyan,D (2621) |
1-0 |
QGA |
2025-01-07 |
| Lashkin,Jegor (2517) – Kostov,Deyan Samuil (2334) |
1/2-1/2 |
QGA |
2025-01-07 |
| Kostov,Deyan Samuil (2334) – Dreev,A (2590) |
1/2-1/2 |
QGD Slav |
2025-01-07 |
| Cahaya,Satria Duta (2360) – Kostov,Deyan Samuil (2334) |
0-1 |
Sicilian |
2025-01-07 |
| Kostov,Deyan Samuil (2334) – Citak,S (2367) |
1-0 |
Nimzo-Indian |
2024-12-29 |
| Shchekachev,A (2456) – Kostov,Deyan Samuil (2334) |
1-0 |
Sicilian defence |
2024-12-29 |
| Cornette,M (2533) – Kostov,Deyan Samuil (2334) |
1-0 |
Queen's bishop game |
2024-12-28 |
| Kostov,Deyan Samuil (2334) – Riehle,Marco (2380) |
0-1 |
QGD |
2024-09-17 |