Prepare against Deyan Samuil Kostov
FM · BGR · World #3,279 classical · FIDE ID 30909015
Our database contains 509 games by Deyan Samuil Kostov, covering Jul 2015 to Jul 2026. Below you'll find Deyan Samuil Kostov's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Deyan Samuil Kostov before a game. You can open the same data in the free interactive preparation workstation, which builds a move-by-move opening tree from every game.
Ratings
| Time control | Current | Peak | Peak date |
|---|---|---|---|
| Classical | 2,327 | 2,368 | Aug 2025 |
| Rapid | 2,305 | 2,308 | Aug 2025 |
| Blitz | 2,203 | 2,245 | Aug 2024 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 509 | 207 | 136 | 166 | 40.7% |
| As White | 254 | 106 | 77 | 71 | 41.7% |
| As Black | 255 | 101 | 59 | 95 | 39.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Deyan Samuil Kostov's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Deyan Samuil Kostov's side.
First moves as White (254 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 209 | 82.3% | 56.0% |
| e4 | 42 | 16.5% | 61.9% |
| c4 | 3 | 1.2% | 50.0% |
Main lines as White
- 1.d4 — 82% of White games, 56.0% score
- …Nf6 (56% of these games) — Kostov usually continues c4 (51.3% score)
- …d5 (28% of these games) — Kostov usually continues c4 (65.2% score)
- …d6 (4% of these games) — Kostov usually continues c4 (50.0% score)
- 1.e4 — 17% of White games, 61.9% score
- …c5 (45% of these games) — Kostov usually continues Nf3 (68.2% score)
- …e5 (26% of these games) — Kostov usually continues Nf3 (68.2% score)
- …e6 (10% of these games) — Kostov usually continues Nf3 (50.0% score)
As Black against 1.e4 (106 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 103 | 97.2% | 54.9% |
| e6 | 2 | 1.9% | 50.0% |
| g6 | 1 | 0.9% | 100.0% |
As Black against 1.d4 (101 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 94 | 93.1% | 46.3% |
| Nf6 | 6 | 5.9% | 25.0% |
| d6 | 1 | 1.0% | 100.0% |
Deyan Samuil Kostov's chess games
All 509 games by Deyan Samuil Kostov in the Chess.ceo database (Jul 2015 - Jul 2026) are free to browse, search and replay: filter by opening, opponent, event or date on the player page, or step through any game on the analysis board. Record: 207 wins, 136 draws, 166 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| E48 | Nimzo-Indian: Rubinstein System | 37 | 12/13/12 | 32.4% |
| A45 | Trompowsky Attack | 33 | 11/10/12 | 33.3% |
| D00 | London System | 25 | 14/7/4 | 56.0% |
| D35 | Indian Defense | 19 | 13/2/4 | 68.4% |
| E90 | King's Indian Defense: Orthodox Variation | 18 | 5/2/11 | 27.8% |
| D45 | Slav Defense | 14 | 5/8/1 | 35.7% |
| A57 | Benoni Defense | 12 | 6/0/6 | 50.0% |
| B22 | Sicilian | 9 | 5/2/2 | 55.6% |
| B22 | Sicilian: Alapin | 8 | 4/3/1 | 50.0% |
| A80 | Dutch Defense | 7 | 1/5/1 | 14.3% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B61 | Sicilian | 56 | 24/16/16 | 42.9% |
| D20 | Queen's Gambit Accepted | 48 | 16/11/21 | 33.3% |
| D00 | Queen's Pawn Game | 22 | 5/8/9 | 22.7% |
| B48 | Sicilian: Taimanov | 20 | 9/2/9 | 45.0% |
| D02 | London System | 15 | 5/5/5 | 33.3% |
| A29 | English Opening: Reverse Sicilian | 14 | 9/4/1 | 64.3% |
| A06 | Réti Opening | 11 | 5/1/5 | 45.5% |
| B23 | Sicilian: Closed | 11 | 3/3/5 | 27.3% |
| A50 | Indian Defense | 9 | 3/3/3 | 33.3% |
| A07 | Réti Opening: Keres Variation | 7 | 2/0/5 | 28.6% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 2025 | David Paravyan | 2,621 | Titled Tue Late | D26 |
| Mar 2023 | Jose Fernando Cuenca Jimenez | 2,553 | Titled Tue Late | E90 |
| Mar 2025 | Liam Vrolijk | 2,517 | 24th OGD Rapid | A06 |
| Jan 2025 | Bayarsaikhan Gundavaa | 2,515 | Paracin Prestige Open | D28 |
| Aug 2024 | Novendra Priasmoro | 2,503 | 13th Split Open | D03 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Titled Tuesday | 2025 | 140 | 67.5 | 2,253 |
| ch-EU Union U12 | 2018 | 18 | 11 | 1,720 |
| ch-EU Union U14 | 2020 | 17 | 11 | 1,955 |
| Paracin Prestige Open | 2025 | 12 | 6.5 | 2,293 |
| 2nd Hvar Arsenal Blitz Open | 2023 | 11 | 7.5 | 2,191 |
| Wch U10 | 2016 | 11 | 6 | 1,504 |
| Primorsko Open | 2021 | 10 | 5 | 2,156 |
| 13th Split Open | 2024 | 10 | 7 | 2,432 |
Interactive opening tree from all 509 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Deyan Samuil Kostov's chess games?
509 games by Deyan Samuil Kostov, from Jul 2015 to Jul 2026, are free to browse and replay move by move — no signup needed. The preparation view groups them into an opening tree showing every line Deyan Samuil Kostov has played.
What does Deyan Samuil Kostov play on the first move as White?
Across 254 games with White in our database, Deyan Samuil Kostov opens with 1.d4 (82% of games), 1.e4 (17% of games), 1.c4 (1% of games). Against 1.e4 as Black, Deyan Samuil Kostov answers 1...c5 (97% of games), 1...e6 (2% of games), 1...g6 (1% of games). Against 1.d4: 1...d5 (93% of games), 1...Nf6 (6% of games), 1...d6 (1% of games).
What openings does Deyan Samuil Kostov play as White?
As White, Deyan Samuil Kostov's most-played openings in our database are: Nimzo-Indian: Rubinstein System (37 games, 32.4% win rate); Trompowsky Attack (33 games, 33.3% win rate); London System (25 games, 56.0% win rate). The full breakdown of 254 games with White is in the table above.
What openings does Deyan Samuil Kostov play as Black?
As Black, Deyan Samuil Kostov most often plays: Sicilian (56 games, 42.9% win rate); Queen's Gambit Accepted (48 games, 33.3% win rate); Queen's Pawn Game (22 games, 22.7% win rate). See the table above for the top ten Black openings across 255 games.
What is Deyan Samuil Kostov's FIDE rating?
Deyan Samuil Kostov is currently rated 2,327 in classical chess, 2,305 in rapid and 2,203 in blitz. Peak classical rating: 2,368 (Aug 2025).
How many games has Deyan Samuil Kostov played?
Our database contains 509 games by Deyan Samuil Kostov, covering Jul 2015 to Jul 2026. Overall record: 207 wins, 136 draws, 166 losses (40.7% win rate).
How do I prepare against Deyan Samuil Kostov?
509 games by Deyan Samuil Kostov reveal their opening repertoire, most-played lines, and the variations where they score worst — the raw material for targeted preparation. The interactive opening tree lets you walk every line to any depth.