Player profile
Kostov, Deyan Samuil
Dossier
51 of 53 games analyzed.
Accuracy: 93.6%
Opened d4: 18/18
Castled kingside: 29Same-side castling: 27Did not castle: 5Castled queenside: 1Opposite-side castling: 1
Fianchettoed queenside: 15Played on the queenside: 11Played in the center: 11Played on the kingside: 10Fianchettoed kingside: 5
Active pieces: 26Kept the bishop pair: 25Space advantage: 24Backward pawn: 22Initiated exchanges: 22Sacrificed material: 19Isolated pawn: 15Avoided exchanges: 6Missed tactics: 5Accepted short draws: 1
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 18 games 8W 5D 5L
Nimzo-Indian Defense 4 games 2W 0D 2L
Normal Variation 4 games 2W 0D 2L
Botvinnik System
2 games
1W
0D
1L
Classical Defense
1 game
0W
0D
1L
(unspecified)
1 game
1W
0D
0L
Trompowsky Attack 3 games 1W 0D 2L
(unspecified) 3 games 1W 0D 2L
(unspecified)
3 games
1W
0D
2L
Queen's Gambit Declined 3 games 2W 1D 0L
Exchange Variation 3 games 2W 1D 0L
Reshevsky Variation
2 games
2W
0D
0L
Positional Variation
1 game
0W
1D
0L
King's Indian Defense 2 games 1W 0D 1L
Normal Variation 1 game 1W 0D 0L
Rare Defenses
1 game
1W
0D
0L
Makogonov Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Semi-Slav Defense 2 games 1W 1D 0L
Stoltz Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Main Line 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Dutch Defense 2 games 0W 2D 0L
(unspecified) 2 games 0W 2D 0L
(unspecified)
2 games
0W
2D
0L
Queen's Gambit Accepted 1 game 0W 1D 0L
Janowski-Larsen Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Queen's Pawn Game 1 game 1W 0D 0L
Torre Attack 1 game 1W 0D 0L
Grünfeld Variation, Main Line
1 game
1W
0D
0L
As Black 19 games 9W 5D 5L
Queen's Gambit Accepted 7 games 2W 3D 2L
Classical Defense 2 games 1W 0D 1L
Main Line
2 games
1W
0D
1L
Central Variation 2 games 1W 1D 0L
McDonnell Defense
1 game
0W
1D
0L
Rubinstein Defense
1 game
1W
0D
0L
Mannheim Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Furman Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Normal Variation 1 game 0W 1D 0L
Traditional System
1 game
0W
1D
0L
Sicilian Defense 6 games 4W 0D 2L
Taimanov Variation 5 games 3W 0D 2L
Bastrikov Variation, English Attack
4 games
3W
0D
1L
Bastrikov Variation
1 game
0W
0D
1L
French Variation 1 game 1W 0D 0L
Westerinen Attack
1 game
1W
0D
0L
Queen's Pawn Game 2 games 0W 1D 1L
London System 1 game 0W 0D 1L
with e6
1 game
0W
0D
1L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
French Defense 1 game 0W 1D 0L
Advance Variation 1 game 0W 1D 0L
Euwe Variation
1 game
0W
1D
0L
Zukertort Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Rubinstein Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 1 game 1W 0D 0L
King's English Variation 1 game 1W 0D 0L
Three Knights System
1 game
1W
0D
0L
Blunders Top 4 of 165
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 53 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.03.14 | Round 7: Daniel Fridman - Kostov, Deyan Samuil | 7.5 | 2026.03.14 Daniel Fridman (8149482) | 0 | 89.00% | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 | |
| 2025.06.14 | Round 9: Demchenko, Anton - Kostov, Deyan Samuil | 9.7 | 2025.06.14 Demchenko, Anton (4160258) (2619) | 0 | 91.80% | 1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 | |
| 2025.06.13 | Round 8: Prishita Gupta - Kostov, Deyan Samuil | 8.16 | 2025.06.13 Prishita Gupta (25978985) (1938) | 1 | 96.00% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.06.12 | Round 7: Kostov, Deyan Samuil - Bernadskiy, Vitaliy | 7.7 | 2025.06.12 Bernadskiy, Vitaliy (14100371) (2497) | 0 | 91.00% | 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 c5 | |
| 2025.06.11 | Round 6: Alvarez Serrano, Carlos - Kostov, Deyan Samuil | 6.15 | 2025.06.11 Alvarez Serrano, Carlos (22238689) (2153) | 1 | 91.90% | 1. d4 d5 2. c4 dxc4 3. Nf3 a6 | |
| 2025.06.10 | Round 5: Kostov, Deyan Samuil - Aarav Sarbalia | 5.24 | 2025.06.10 Aarav Sarbalia (33382859) (2243) | 1 | 95.30% | 1. d4 Nf6 2. Bg5 d5 3. Nd2 c5 | |
| 2025.06.09 | Round 4: Nandish V S - Kostov, Deyan Samuil | 4.20 | 2025.06.09 Nandish V S (45084297) (2241) | ½ | 90.30% | 1. d4 d5 2. c4 dxc4 3. Nf3 a6 | |
| 2025.06.09 | Round 3: Kostov, Deyan Samuil - Safarli, Eltaj | 3.2 | 2025.06.09 Safarli, Eltaj (13402129) (2620) | 0 | 90.30% | 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 | |
| 2025.06.08 | Round 2: Sieber, Fiona - Kostov, Deyan Samuil | 2.20 | 2025.06.08 Sieber, Fiona (12902373) (2237) | 1 | - | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.06.08 | Round 1: Kostov, Deyan Samuil - Darshan G | 1.30 | 2025.06.08 Darshan G (25157760) (2103) | 1 | 96.50% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2025.04.27 | Round 9: Kostov, Deyan Samuil - Baum, Jonasz | 9.23 | 2025.04.27 Baum, Jonasz (1195360) (2487) | 0 | 93.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.04.26 | Round 8: Kostov, Deyan Samuil - Iermito, Sebastian Dario | 8.16 | 2025.04.26 Iermito, Sebastian Dario (114286) (2499) | ½ | 97.60% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2025.04.26 | Round 7: Woodward, Andy - Kostov, Deyan Samuil | 7.13 | 2025.04.26 Woodward, Andy (30953499) (2536) | ½ | 97.50% | 1. d4 d5 2. c4 dxc4 3. e4 e5 | |
| 2025.04.25 | Round 6: Kostov, Deyan Samuil - Matviishen, Viktor | 6.9 | 2025.04.25 Matviishen, Viktor (14129850) (2550) | ½ | 93.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.04.23 | Round 3: Agmanov, Zhandos - Kostov, Deyan Samuil | 3.22 | 2025.04.23 Agmanov, Zhandos (13708309) (2470) | ½ | 97.20% | 1. e4 c5 2. Nf3 e6 3. c3 Nc6 | |
| 2025.04.23 | Round 2: Kostov, Deyan Samuil - Cuenca Jimenez, Jose Fernando | 2.27 | 2025.04.23 Cuenca Jimenez, Jose Fernando (2255570) (2487) | 1 | 95.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.03.15 | Round 7: Dgebuadze, Alexandre - Kostov, Deyan Samuil | 7.2 | 2025.03.15 Dgebuadze, Alexandre (203882) (2454) | ½ | - | 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 | |
| 2025.03.15 | Round 6: Kostov, Deyan Samuil - Bosboom, Manuel | 6.4 | 2025.03.15 Bosboom, Manuel (1000080) | 1 | 95.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.03.15 | Round 5: Vrolijk, Liam - Kostov, Deyan Samuil | 5.4 | 2025.03.15 Vrolijk, Liam (1048333) (2521) | 1 | 99.30% | 1. Nf3 d5 2. e3 Nf6 3. c4 dxc4 | |
| 2025.03.15 | Round 2: Kostov, Deyan Samuil - Ivic, Velimir | 2.3 | 2025.03.15 Ivic, Velimir (950122) (2490) | 0 | 88.30% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2024.09.06 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 5.2 | 2024.09.06 Plenca, Jadranko (14527146) (2448) | 0 | 91.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.08.11 | 13. SPLIT OPEN | 10.4 | 2024.08.11 Rahman, Masruri (7101163) (2295) | ½ | 100.00% | 1. d4 d5 | |
| 2024.08.10 | 13. SPLIT OPEN | 9.1 | 2024.08.10 Hansen, Eric (2606771) (2610) | 0 | 89.30% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2024.08.09 | 13. SPLIT OPEN | 8.2 | 2024.08.09 Volodin, Aleksandr (4501950) (2449) | ½ | 93.40% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2024.08.09 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 7.2 | 2024.08.09 Priasmoro, Novendra (7105029) (2503) | 1 | 94.50% | 1. d4 Nf6 2. Bg5 d5 3. Nd2 g6 | |
| 2024.08.07 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 6.6 | 2024.08.07 Nomindalai Tumurbaatar (4904095) (2189) | 1 | 95.70% | 1. d4 d5 2. c4 dxc4 3. e4 c5 | |
| 2024.08.04 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 3.7 | 2024.08.04 Grgantov, Marin (14561824) (2110) | 1 | 90.50% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.08.04 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 2.9 | 2024.08.04 Kostov, Kiril (2933926) (2022) | 1 | 96.50% | 1. e4 c5 2. Nf3 e6 3. b3 d6 | |
| 2024.08.03 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 1.11 | 2024.08.03 Day, Jonathan A (429180) (1874) | 1 | 96.80% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2024.07.05 | 13. SPLIT OPEN: ŠAHOVSKI FESTIVAL 2024 | 4.5 | 2024.07.05 Dubinski, Mateusz (1125923) (2223) | 1 | 95.00% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2024.06.23 | SUI-chT Zuerich-Geneve | 5.6 | 2024.06.23 Fischer, Daniel (1328360) (2362) | 0 | 89.50% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2024.04.01 | Grenke Chess Open 2024 | 9.41 | 2024.04.01 Krstulovic, Alex (760056) (2447) | 1 | 93.50% | 1. d4 d5 2. Nf3 Nf6 3. e3 e6 | |
| 2024.04.01 | Grenke Chess Open 2024 | 8.39 | 2024.04.01 Milov, Leonid (14101068) (2419) | ½ | 95.00% | 1. d4 f5 2. Nf3 Nf6 3. Bg5 e6 | |
| 2024.03.31 | new tournament description | 7.38 | 2024.03.31 Adamovics, Aleksejs (11622075) (2179) | 1 | 94.80% | 1. c4 e5 2. Nc3 Nc6 3. Nf3 g6 | |
| 2024.03.31 | Grenke Open | 6.12 | 2024.03.31 Sharma Isha (35006665) (2224) | 1 | 95.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.03.30 | Grenke Chess Open 2024 | 5.35 | 2024.03.30 Noe, Christopher (24692018) (2527) | 0 | 83.40% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2024.03.30 | Grenke Chess Open 2024 | 4.26 | 2024.03.30 Schlosser, Philipp (4600169) (2511) | ½ | 88.70% | 1. d4 f5 2. Nf3 Nf6 3. Bg5 e6 | |
| 2023.10.21 | 2. Open Hvar | 9.7 | 2023.10.21 Ronce, Nathan (685623) (2159) | 1 | 92.70% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2023.10.20 | 2. Open Hvar | 8.3 | 2023.10.20 Wu, Yixing (8625387) (2151) | ½ | 94.70% | 1. d4 d5 2. Bf4 Nf6 3. e3 e6 | |
| 2023.10.19 | 2. Open Hvar | 7.4 | 2023.10.19 Ozen, Deniz (6349196) (2382) | ½ | 97.40% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2023.10.18 | 2. Open Hvar | 6.9 | 2023.10.18 Underwood, Jon (425877) (1999) | 1 | 94.80% | 1. c4 e5 2. g3 Nc6 3. Bg2 g6 | |
| 2023.10.18 | 2. Open Hvar | 5.9 | 2023.10.18 Ivancic, Ivan (14593840) (1999) | ½ | 95.50% | 1. d4 d5 2. c4 e6 3. Nc3 c6 | |
| 2023.10.17 | 2. Open Hvar | 4.12 | 2023.10.17 Boric, Jakov (14593165) (1895) | 1 | 94.40% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2023.10.16 | 2. Open Hvar | 3.9 | 2023.10.16 Ramaj, Ergit (4703669) (1951) | 0 | 91.20% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2023.10.16 | 2. Open Hvar | 2.11 | 2023.10.16 Patel, Zain (469246) (1964) | 1 | 96.30% | 1. d4 d5 2. c4 dxc4 3. Nf3 a6 | |
| 2023.10.15 | 2. Open Hvar | 1.12 | 2023.10.15 Begic, Klara (14420147) (1723) | 1 | 93.40% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2023.08.13 | 12. Split Open 05.-13.08.2023. | 9.20 | 2023.08.13 Kostov, Kiril (2933926) (2047) | 1 | 100.00% | ||
| 2023.08.12 | 12. Split Open 05.-13.08.2023. | 8.9 | 2023.08.12 Novosel, Lovro (14547120) (2383) | 0 | 85.80% | 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 | |
| 2023.08.11 | 12. Split Open 05.-13.08.2023. | 7.10 | 2023.08.11 Kopylov, Daniel (12921971) (2342) | ½ | 97.50% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2023.08.09 | 12. Split Open 05.-13.08.2023. | 6.17 | 2023.08.09 Kurtovic, Darko (14580225) (2039) | 1 | 95.60% | 1. e4 c5 2. Nf3 e6 3. c4 Nc6 | |
| 2023.08.08 | 12. Split Open 05.-13.08.2023. | 5.4 | 2023.08.08 Palac, Mladen (14500116) (2482) | 0 | 89.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2023.08.07 | 12. Split Open 05.-13.08.2023. | 4.16 | 2023.08.07 Rasic, Ivan (14593467) (1963) | 1 | 87.70% | 1. e4 c5 2. a3 e6 3. b4 b6 | |
| 2023.08.06 | 12. Split Open 05.-13.08.2023. | 3.16 | 2023.08.06 Sakic, Matija (1744372) (1923) | ½ | 94.70% | 1. d4 f5 2. Nf3 Nf6 3. Bg5 e6 |