II Arche Chess Open B
Open SwissStandard
46 players participated in this 9-round tournament, held from 21 Feb 2026 to 28 Feb 2026 in Lublin, Poland. Top 10 Elo average was 1635, and top seed was Jakub Mazurek (🇵🇱 POL, 1699).
Krystian Debczak (🇵🇱 POL, 1602) won with 7.5/9, ahead of Michal Baranowski (7.0) and Maksymilian Solski (6.5). Debczak shared the lead from round 6 and won solo starting round 8.
The biggest upset came in round 8: Jonatan Klosowski (1425) beat Artur Chlewinski (1602), a +177-point gap.
Location
🇵🇱Lublin, Poland
Dates
21 Feb 2026 → 28 Feb 2026
Time control
Standard: 90 minutes for game with 30 seconds delay from move 1
System
Swiss · 9 rounds
Federations · 1 represented
🇵🇱Poland×45
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 9 roundsKrystian Debczak led from R8; +0.5-point edge over the runner-up. Title race converged from 3 co-leaders at R4 to 1 by R8.
Co-leaders
16
6
3
3
5
2
4
1
1
R8–R9 · LEAD HELD
Krystian Debczak held the sole lead from R8 through R9 without losing it.
R7 · HEAD-TO-HEAD · WINNER VS 2ND
Krystian Debczak drew with Michal Baranowski (White).
WIN STREAKS · 3 top finishers
Krystian Debczak 5 wins (R2–R6)Michal Baranowski 3 wins (R1–R3)Maksymilian Solski 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Krystian Debczak | * | ½ | — | — |
| 2Michal Baranowski | ½ | * | ½ | — |
| 3Maksymilian Solski | — | ½ | * | 1 |
| 4Hubert Stepnik | — | — | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Debczak, Krystian | 1602 | POL | −11N | +46B | +20N | +14B | +28N | +5B | =2B | +8N | +7N | 7.5 | 43.5 | 43.5 | 34.50 | 1997 | +49.2 |
| 2 | Baranowski, Michal | 1697 | POL | +41N | +19B | +6N | =3B | =5N | +8B | =1N | =7B | +9N | 7.0 | 47.5 | 50.0 | 37.00 | 1813 | +25.6 |
| 3 | Solski, Maksymilian | 1634 | POL | +10B | +32N | +21B | =2N | −8B | +4N | +9B | −6B | +14N | 6.5 | 45.5 | 49.0 | 34.00 | 1691 | +22.4 |
| 4 | Stepnik, Hubert | 1590 | POL | +46N | +11B | −5N | =21B | +16N | −3B | +14N | +12B | +10N | 6.5 | 43.5 | 43.5 | 28.75 | 1598 | +0.8 |
| 5 | Mazurek, Jakub | 1699 | POL | +24B | +25N | +4B | =8N | =2B | −1N | −7N | +27B | +19N | 6.0 | 46.0 | 50.0 | 30.25 | 1696 | +0.2 |
| 6 | Chochowski, Jakub | 1544 | POL | +12N | +17B | −2B | +13N | −9B | +24N | +15B | +3N | −8B | 6.0 | 45.5 | 50.0 | 32.00 | 1624 | +24.8 |
| 7 | Kedziora, Antoni | 1587 | POL | =28B | =29N | +35B | +23N | +15B | =9N | +5B | =2N | −1B | 6.0 | 43.5 | 47.0 | 29.25 | 1755 | +54.4 |
| 8 | Ozoga, Bartosz | 1681 | POL | F | +42B | +14N | =5B | +3N | −2N | +10B | −1B | +6N | 5.5 | 47.0 | 49.5 | 28.50 | 1696 | +4.2 |
| 9 | Rozanski, Milosz | 1610 | POL | +40N | =27B | =16N | +11B | +6N | =7B | −3N | +13B | −2B | 5.5 | 45.5 | 48.0 | 27.00 | 1524 | -28.4 |
| 10 | Niewolik, Tomasz | 0 | POL | −3N | =31B | +36N | +34B | +18N | +12B | −8N | +21B | −4B | 5.5 | 40.5 | 44.0 | 23.50 | 1548 | 0.0 |
| 11 | Lubanski, Andrzej | 0 | POL | +1B | −4N | +22B | −9N | =33B | +32N | −21N | +18B | +37N | 5.5 | 40.0 | 43.5 | 25.25 | 1610 | 0.0 |
| 12 | Litwajtis, Pola | 0 | POL | −6B | =33N | +26B | +?B | +25N | −10N | +23B | −4N | +20B | 5.5 | 39.5 | 39.5 | 19.75 | 1569 | 0.0 |
| 13 | Szarawarski, Michal | 0 | POL | −18N | +45B | +19N | −6B | =27N | +16B | +?N | −9N | +22B | 5.5 | 34.0 | 34.0 | 16.00 | 1560 | 0.0 |
| 14 | Borowik, Grzegorz | 1492 | POL | +44N | +34B | −8B | −1N | +29B | +35N | −4B | +15N | −3B | 5.0 | 42.0 | 42.0 | 16.00 | 1502 | +1.6 |
| 15 | Segit, Maksymilian | 1649 | POL | =20N | +30B | +27N | =18B | −7N | +21B | −6N | −14B | +31N | 5.0 | 38.5 | 42.5 | 21.00 | 1390 | -82.4 |
| 16 | Olkuski, Tadeusz | 1563 | POL | =29B | +38N | =9B | =32N | −4B | −13N | =30B | +28B | +27N | 5.0 | 37.0 | 40.5 | 20.00 | 1541 | -2.4 |
| 17 | Walczyna, Karol | 0 | POL | +33B | −6N | −32B | =26N | =36B | +39N | =24B | =23N | +29B | 5.0 | 34.0 | 37.5 | 19.50 | 1509 | 0.0 |
| 18 | Augustyniak, Rafal | 1590 | POL | +13B | −21N | +24B | =15N | −10B | +30N | −22B | −11N | +40B | 4.5 | 39.0 | 41.5 | 19.00 | 1547 | -3.6 |
| 19 | Smoliga, Julian | 1524 | POL | +26B | −2N | −13B | −35N | +38B | +41B | +28N | =22N | −5B | 4.5 | 38.5 | 41.0 | 16.75 | 1507 | -5.2 |
| 20 | Putowski, Lukasz | 1416 | POL | =15B | =22N | −1B | +38N | −24B | +33N | =36B | +32N | −12N | 4.5 | 37.5 | 41.0 | 17.00 | 1554 | +43.2 |
| 21 | Biba, Yurii | 0 | POL | F | +18B | −3N | =4N | +32B | −15N | +11B | −10N | +?B | 4.5 | 37.0 | 37.0 | 16.75 | 1602 | 0.0 |
| 22 | Rozanski, Ignacy | 1519 | POL | =36N | =20B | −11N | +30B | =37N | =27B | +18N | =19B | −13N | 4.5 | 36.0 | 39.5 | 18.50 | 1592 | +15.6 |
| 23 | Wyrwisz, Lukasz | 1529 | POL | =30N | +36B | =34N | −7B | =41N | +28B | −12N | =17B | =25N | 4.5 | 36.0 | 38.5 | 17.25 | 1457 | -17.2 |
| 24 | Koziel, Jan | 1477 | POL | −5N | +43B | −18N | +40B | +20N | −6B | =17N | −37B | +33N | 4.5 | 35.5 | 37.5 | 15.00 | 1493 | +4.0 |
| 25 | Bogdanowicz, Hubert | 1529 | POL | +43B | −5B | +40N | −28N | −12B | =29N | =31B | +30N | =23B | 4.5 | 34.5 | 36.5 | 14.75 | 1422 | -10.4 |
| 26 | Pachol, Michal | 0 | POL | −19N | =41B | −12N | =17B | =40N | −34B | +45N | +42B | +32B | 4.5 | 29.5 | 29.5 | 11.00 | 1517 | 0.0 |
| 27 | Prusko, Pawel | 1478 | POL | +45B | =9N | −15B | =29N | =13B | =22N | +35B | −5N | −16B | 4.0 | 39.0 | 39.0 | 13.25 | 1367 | -21.2 |
| 28 | Tylus, Piotr | 0 | POL | =7N | =?B | +42N | +25B | −1B | −23N | −19B | −16N | +36B | 4.0 | 38.0 | 38.0 | 13.50 | 1455 | 0.0 |
| 29 | Wolkowski, Piotr | 0 | POL | =16N | =7B | =?N | =27B | −14N | =25B | +34N | =33B | −17N | 4.0 | 36.5 | 36.5 | 15.00 | 1540 | 0.0 |
| 30 | Mystkowski, Franciszek | 0 | POL | =23B | −15N | +33B | −22N | +34N | −18B | =16N | −25B | +42N | 4.0 | 35.0 | 37.5 | 14.25 | 1517 | 0.0 |
| 31 | Shymanskyi, Vladyslav | 0 | POL | −32B | =10N | −39B | −33N | +44B | +40B | =25N | +35N | −15B | 4.0 | 31.5 | 31.5 | 11.00 | 1170 | 0.0 |
| 32 | Korycki, Blazej | 1507 | POL | +31N | −3B | +17N | =16B | −21N | −11B | +41N | −20B | −26N | 3.5 | 39.5 | 42.0 | 14.00 | 1432 | -17.2 |
| 33 | Kolsut, Bartosz | 1573 | POL | −17N | =12B | −30N | +31B | =11N | −20B | +43B | =29N | −24B | 3.5 | 37.0 | 39.0 | 13.50 | 646 | -54.0 |
| 34 | Chlewinski, Artur | 1602 | POL | +35B | −14N | =23B | −10N | −30B | +26N | −29B | −39N | +41B | 3.5 | 34.5 | 37.0 | 12.75 | 1391 | -23.4 |
| 35 | Kuprowski, Mikolaj | 0 | POL | −34N | +44B | −7N | +19B | +42N | −14B | −27N | −31B | =38N | 3.5 | 33.0 | 33.0 | 8.75 | 1401 | 0.0 |
| 36 | Pecyna, Krystian | 0 | POL | =22B | −23N | −10B | +44N | =17N | +42B | =20N | −?B | −28N | 3.5 | 30.5 | 30.5 | 9.50 | 1423 | 0.0 |
| 37 | Stawski, Krystian | 0 | POL | −42N | −40B | F | +39N | =22B | −?B | +38N | +24N | −11B | 3.5 | 26.5 | 26.5 | 13.75 | 1485 | 0.0 |
| 38 | Rogalski, Daniel | 0 | POL | =?N | −16B | =41N | −20B | −19N | +44N | −37B | +43N | =35B | 3.5 | 25.5 | 25.5 | 5.00 | 1257 | 0.0 |
| 39 | Klosowski, Jonatan | 1425 | POL | F | F | +31N | −37B | +45N | −17B | =42N | +34B | — | 3.5 | 24.0 | 24.0 | 8.75 | 1739 | +32.8 |
| 40 | Gorski, Krzysztof | 0 | POL | −9B | +37N | −25B | −24N | =26B | −31N | F | +41B | −18N | 2.5 | 33.5 | 33.5 | 8.25 | 1291 | 0.0 |
| 41 | Kaczan, Franciszek | 1461 | POL | −2B | =26N | =38B | +45N | =23B | −19N | −32B | −40N | −34N | 2.5 | 33.5 | 33.5 | 6.25 | 1206 | -51.2 |
| 42 | Maczynska, Agnieszka | 1495 | POL | +37B | −8N | −28B | +43N | −35B | −36N | =39B | −26N | −30B | 2.5 | 32.0 | 34.0 | 7.25 | 1359 | -13.6 |
| 43 | FIDE 545026815 | 0 | — | −25N | −24N | +44B | −42B | −?N | +45B | −33N | −38B | F | 2.0 | 18.5 | 18.5 | 0.00 | 717 | 0.0 |
| 44 | Kepka, Dominik | 0 | POL | −14B | −35N | −43N | −36B | −31N | −38B | F | — | — | 0.0 | 22.0 | 24.0 | 0.00 | 694 | 0.0 |
| 45 | Niewolik, Jan | 0 | POL | −27N | −13N | F | −41B | −39B | −43N | −26B | — | — | 0.0 | 22.0 | 22.0 | 0.00 | 648 | 0.0 |
| 46 | Twardowski, Mateusz | 0 | POL | −4B | −1N | F | — | — | — | — | — | — | 0.0 | 14.0 | 17.5 | 0.00 | 798 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Kedziora, AntoniPOL+54.46.0 pts · #9
- 2Debczak, KrystianPOL+49.27.5 pts · #3
- 3Putowski, LukaszPOL+43.24.5 pts · #15
Top rating losers
- 1Segit, MaksymilianPOL-82.45.0 pts · #23
- 2Kolsut, BartoszPOL-54.03.5 pts · #45
- 3Kaczan, FranciszekPOL-51.22.5 pts · #40
Biggest upsets
- R8+177 Elo gap
- R6+157 Elo gap
- R8+157 Elo gap