Prepare against Jakub Kosakowski
GM · Poland · World #449 classical · FIDE ID 1185080
When preparing against Jakub Kosakowski, expect 1.e4 in 80% of White games. Against 1.e4 the reply is 1...c5 (48% of games); against 1.d4, 1...Nf6 (75%). Lowest win rate among frequent openings: Queen's Gambit Declined: Ragozin Defense as Black, 37.0% over 46 games.
Our database contains 3,072 games by Jakub Kosakowski, covering Sep 2011 to Sep 2026. Below you'll find Jakub Kosakowski's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jakub Kosakowski 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 | 2,520 | 2,551 | Jul 2025 |
| Rapid | 2,551 | 2,551 | Sep 2026 |
| Blitz | 2,528 | 2,528 | Sep 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 3,072 | 1,687 | 573 | 812 | 54.9% |
| As White | 1,553 | 898 | 293 | 362 | 57.8% |
| As Black | 1,519 | 789 | 280 | 450 | 51.9% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jakub Kosakowski's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jakub Kosakowski's side.
First moves as White (1,553 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 1,246 | 80.2% | 65.4% |
| d4 | 154 | 9.9% | 76.6% |
| Nf3 | 91 | 5.9% | 74.2% |
| c4 | 28 | 1.8% | 82.1% |
| b3 | 7 | 0.5% | 42.9% |
| g3 | 4 | 0.3% | 50.0% |
Main lines as White
- 1.e4 — 80% of White games, 65.4% score
- …c5 (43% of these games) — Kosakowski usually continues Nf3 (65.4% score)
- …e5 (25% of these games) — Kosakowski usually continues Nf3 (65.2% score)
- …e6 (11% of these games) — Kosakowski usually continues d4 (67.6% score)
- 1.d4 — 10% of White games, 76.6% score
- …Nf6 (58% of these games) — Kosakowski usually continues Nf3 (77.3% score)
- …d5 (34% of these games) — Kosakowski usually continues c4 (81.7% score)
- …e6 (3% of these games) — Kosakowski usually continues Nf3 (100.0% score)
As Black against 1.e4 (687 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 328 | 47.7% | 63.3% |
| c6 | 242 | 35.2% | 65.5% |
| e5 | 84 | 12.2% | 66.1% |
| e6 | 9 | 1.3% | 77.8% |
| Nf6 | 5 | 0.7% | 80.0% |
| g6 | 4 | 0.6% | 50.0% |
As Black against 1.d4 (522 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 394 | 75.5% | 59.5% |
| d5 | 81 | 15.5% | 61.1% |
| f5 | 23 | 4.4% | 58.7% |
| e6 | 7 | 1.3% | 78.6% |
| g6 | 6 | 1.1% | 41.7% |
| d6 | 2 | 0.4% | 75.0% |
Jakub Kosakowski's chess games
All 3,072 games by Jakub Kosakowski in the Chess.ceo database (Sep 2011 - Sep 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: 1,687 wins, 573 draws, 812 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B30 | Sicilian | 254 | 148/44/62 | 58.3% |
| B90 | Sicilian: Najdorf | 97 | 44/17/36 | 45.4% |
| B12 | Caro-Kann: Advance Variation | 85 | 42/13/30 | 49.4% |
| C45 | Scotch Game | 66 | 38/13/15 | 57.6% |
| C00 | French Defense | 58 | 38/12/8 | 65.5% |
| C84 | Ruy Lopez: Closed | 52 | 25/14/13 | 48.1% |
| A05 | Réti Opening | 51 | 30/10/11 | 58.8% |
| A46 | Indian Defense | 48 | 38/2/8 | 79.2% |
| C07 | French: Tarrasch Variation | 35 | 20/8/7 | 57.1% |
| B06 | Modern Defense | 35 | 25/2/8 | 71.4% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B90 | Sicilian: Najdorf | 123 | 70/21/32 | 56.9% |
| B50 | Sicilian | 92 | 50/15/27 | 54.3% |
| D35 | Indian Defense | 81 | 52/9/20 | 64.2% |
| B12 | Caro-Kann: Advance Variation | 69 | 34/14/21 | 49.3% |
| A13 | English Opening | 61 | 28/19/14 | 45.9% |
| E11 | Catalan | 55 | 25/10/20 | 45.5% |
| A05 | Réti Opening | 50 | 22/7/21 | 44.0% |
| D38 | Queen's Gambit Declined: Ragozin Defense | 46 | 17/15/14 | 37.0% |
| B13 | Caro-Kann: Exchange Variation | 39 | 28/6/5 | 71.8% |
| B15 | Caro-Kann: Main Line | 35 | 21/10/4 | 60.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 2025 | Hikaru Nakamura | 2,802 | Titled Tue Late | B06 |
| Feb 2026 | Erigaisi Arjun | 2,775 | 2nd 3-0 Thursday | B50 |
| Feb 2025 | Alireza Firouzja | 2,760 | Titled Tue Early | B50 |
| Aug 2023 | Vladimir Kramnik | 2,753 | Titled Tue Early | B15 |
| Oct 2024 | Jan-Krzysztof Duda | 2,740 | Titled Tue Early | A00 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Titled Tuesday | 2026 | 1,482 | 980.5 | 2,496 |
| Speed Chess Poland | 2024 | 70 | 31.5 | 2,597 |
| 1st 3-0 Thursday | 2026 | 51 | 32.5 | 2,428 |
| Wch Blitz | 2023 | 42 | 21.5 | 2,537 |
| ch-EU Blitz | 2022 | 38 | 25.5 | 2,497 |
| POL-chT 1st League | 2024 | 35 | 23 | 2,432 |
| 2nd 3-0 Thursday | 2026 | 33 | 19 | 2,490 |
| chT-POL U20 | 2018 | 27 | 17 | 2,224 |
Frequent opponents
Head-to-head records: Szymon Gumularz (68 games) · Kacper Piorun (29 games) · Jan-Krzysztof Duda (28 games) · Alexey Sarana (16 games) · Grzegorz Nasuta (15 games) · Olexandr Bortnyk (15 games) · Pawel Teclaf (14 games) · Jose Eduardo Martinez Alcantara (13 games)
Interactive opening tree from all 3,072 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jakub Kosakowski's chess games?
3,072 games by Jakub Kosakowski, from Sep 2011 to Sep 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 Jakub Kosakowski has played.
What does Jakub Kosakowski play on the first move as White?
Across 1,553 games with White in our database, Jakub Kosakowski opens with 1.e4 (80% of games), 1.d4 (10% of games), 1.Nf3 (6% of games). Against 1.e4 as Black, Jakub Kosakowski answers 1...c5 (48% of games), 1...c6 (35% of games), 1...e5 (12% of games). Against 1.d4: 1...Nf6 (75% of games), 1...d5 (16% of games), 1...f5 (4% of games).
What openings does Jakub Kosakowski play as White?
As White, Jakub Kosakowski's most-played openings in our database are: Sicilian (254 games, 58.3% win rate); Sicilian: Najdorf (97 games, 45.4% win rate); Caro-Kann: Advance Variation (85 games, 49.4% win rate). The full breakdown of 1,553 games with White is in the table above.
What openings does Jakub Kosakowski play as Black?
As Black, Jakub Kosakowski most often plays: Sicilian: Najdorf (123 games, 56.9% win rate); Sicilian (92 games, 54.3% win rate); Indian Defense (81 games, 64.2% win rate). See the table above for the top ten Black openings across 1,519 games.
What is Jakub Kosakowski's FIDE rating?
Jakub Kosakowski is currently rated 2,520 in classical chess, 2,551 in rapid and 2,528 in blitz. Peak classical rating: 2,551 (Jul 2025).
How many games has Jakub Kosakowski played?
Our database contains 3,072 games by Jakub Kosakowski, covering Sep 2011 to Sep 2026. Overall record: 1,687 wins, 573 draws, 812 losses (54.9% win rate).
How do I prepare against Jakub Kosakowski?
3,072 games by Jakub Kosakowski 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.