Prepare against Marcin Sieciechowicz
IM · Poland · World #2,088 classical · FIDE ID 1130170
When preparing against Marcin Sieciechowicz, expect 1.d4 in 97% of White games. Against 1.e4 the reply is 1...e6 (54% of games); against 1.d4, 1...Nf6 (65%). Lowest win rate among frequent openings: English Opening as Black, 25.3% over 83 games.
Our database contains 2,210 games by Marcin Sieciechowicz, covering Jan 2004 to Sep 2026. Below you'll find Marcin Sieciechowicz's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Marcin Sieciechowicz 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 | 2,379 | 2,462 | Jul 2013 |
| Rapid | 2,354 | 2,446 | Dec 2013 |
| Blitz | 2,336 | 2,471 | Jul 2013 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 2,210 | 966 | 662 | 582 | 43.7% |
| As White | 1,107 | 539 | 311 | 257 | 48.7% |
| As Black | 1,103 | 427 | 351 | 325 | 38.7% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Marcin Sieciechowicz's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Marcin Sieciechowicz's side.
First moves as White (1,103 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 1,075 | 97.5% | 62.8% |
| Nf3 | 13 | 1.2% | 57.7% |
| b3 | 10 | 0.9% | 85.0% |
| e4 | 4 | 0.4% | 37.5% |
| a3 | 1 | 0.1% | 0.0% |
Main lines as White
- 1.d4 — 97% of White games, 62.8% score
- …Nf6 (58% of these games) — Sieciechowicz usually continues c4 (60.6% score)
- …d5 (29% of these games) — Sieciechowicz usually continues c4 (68.2% score)
- …e6 (3% of these games) — Sieciechowicz usually continues c4 (70.0% score)
- 1.Nf3 — 1% of White games, 57.7% score
- …Nf6 (54% of these games) — Sieciechowicz usually continues g3 (57.1% score)
- …e6 (15% of these games) — Sieciechowicz usually continues g3 (25.0% score)
- …d5 (15% of these games) — Sieciechowicz usually continues g3 (75.0% score)
As Black against 1.e4 (510 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 273 | 53.5% | 54.8% |
| c5 | 207 | 40.6% | 57.7% |
| e5 | 28 | 5.5% | 62.5% |
| b6 | 1 | 0.2% | 100.0% |
| g6 | 1 | 0.2% | 0.0% |
As Black against 1.d4 (354 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 229 | 64.7% | 55.9% |
| d5 | 123 | 34.7% | 49.6% |
| b6 | 1 | 0.3% | 100.0% |
| g6 | 1 | 0.3% | 50.0% |
Marcin Sieciechowicz's chess games
All 2,210 games by Marcin Sieciechowicz in the Chess.ceo database (Jan 2004 - 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: 966 wins, 662 draws, 582 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D17 | Slav Defense | 129 | 72/33/24 | 55.8% |
| D35 | Indian Defense | 124 | 63/40/21 | 50.8% |
| A57 | Benoni Defense | 93 | 58/17/18 | 62.4% |
| E46 | Nimzo-Indian: Rubinstein System | 70 | 33/19/18 | 47.1% |
| E94 | King's Indian Defense: Orthodox Variation | 69 | 31/20/18 | 44.9% |
| E32 | Nimzo-Indian: Classical Variation | 68 | 26/22/20 | 38.2% |
| D87 | Grünfeld Defense | 61 | 26/21/14 | 42.6% |
| D02 | London System | 59 | 30/12/17 | 50.8% |
| D20 | Queen's Gambit Accepted | 34 | 12/19/3 | 35.3% |
| D31 | Queen's Gambit Declined | 33 | 19/6/8 | 57.6% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B90 | Sicilian: Najdorf | 121 | 50/39/32 | 41.3% |
| D12 | Slav Defense | 116 | 34/40/42 | 29.3% |
| D85 | Grünfeld Defense | 93 | 38/28/27 | 40.9% |
| A16 | English Opening | 83 | 21/31/31 | 25.3% |
| C07 | French: Tarrasch Variation | 72 | 23/29/20 | 31.9% |
| C18 | French: Winawer Variation | 64 | 25/19/20 | 39.1% |
| D77 | Indian Defense | 55 | 18/25/12 | 32.7% |
| C02 | French: Advance Variation | 39 | 17/6/16 | 43.6% |
| C00 | French Defense | 36 | 21/4/11 | 58.3% |
| C11 | French: Classical Variation | 30 | 15/8/7 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Dec 2020 | Jeffery Xiong | 2,709 | Titled Tue | A57 |
| May 2023 | Matthias Bluebaum | 2,669 | Titled Tue Early | E24 |
| Jun 2023 | Aryan Tari | 2,646 | Titled Tue Late | A03 |
| May 2023 | Alan Pichot | 2,638 | Titled Tue Late | C18 |
| May 2023 | Shant Sargsyan | 2,630 | Titled Tue Late | A11 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Titled Tuesday | 2026 | 663 | 366 | 2,367 |
| POL-chT 1st League | 2024 | 53 | 29 | 2,422 |
| ch-EU rapid | 2017 | 37 | 22.5 | 2,457 |
| Wroclaw Anderssen Memorial Open | 2024 | 37 | 26.5 | 2,323 |
| ch-POL | 2015 | 27 | 11 | 2,420 |
| chT-POL | 2018 | 24 | 10.5 | 2,391 |
| ch-POL U16 | 2008 | 22 | 16.5 | 2,325 |
| ch-POL U18 | 2010 | 21 | 14 | 2,315 |
Frequent opponents
Head-to-head records: Jacek Tomczak (12 games) · Lukasz Cyborowski (11 games) · Bartosz Socko (10 games) · Marcel Kanarek (10 games) · Maciej Klekowski (10 games)
Interactive opening tree from all 2,210 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Marcin Sieciechowicz's chess games?
2,210 games by Marcin Sieciechowicz, from Jan 2004 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 Marcin Sieciechowicz has played.
What does Marcin Sieciechowicz play on the first move as White?
Across 1,103 games with White in our database, Marcin Sieciechowicz opens with 1.d4 (97% of games), 1.Nf3 (1% of games), 1.b3 (1% of games). Against 1.e4 as Black, Marcin Sieciechowicz answers 1...e6 (54% of games), 1...c5 (41% of games), 1...e5 (5% of games). Against 1.d4: 1...Nf6 (65% of games), 1...d5 (35% of games), 1...b6 (0% of games).
What openings does Marcin Sieciechowicz play as White?
As White, Marcin Sieciechowicz's most-played openings in our database are: Slav Defense (129 games, 55.8% win rate); Indian Defense (124 games, 50.8% win rate); Benoni Defense (93 games, 62.4% win rate). The full breakdown of 1,107 games with White is in the table above.
What openings does Marcin Sieciechowicz play as Black?
As Black, Marcin Sieciechowicz most often plays: Sicilian: Najdorf (121 games, 41.3% win rate); Slav Defense (116 games, 29.3% win rate); Grünfeld Defense (93 games, 40.9% win rate). See the table above for the top ten Black openings across 1,103 games.
What is Marcin Sieciechowicz's FIDE rating?
Marcin Sieciechowicz is currently rated 2,379 in classical chess, 2,354 in rapid and 2,336 in blitz. Peak classical rating: 2,462 (Jul 2013).
How many games has Marcin Sieciechowicz played?
Our database contains 2,210 games by Marcin Sieciechowicz, covering Jan 2004 to Sep 2026. Overall record: 966 wins, 662 draws, 582 losses (43.7% win rate).
How do I prepare against Marcin Sieciechowicz?
2,210 games by Marcin Sieciechowicz 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.