Mistrzostwa Mazowsza Juniorow 2026 do lat 13
Open SwissStandard
49 players participated in this 7-round tournament, held from 06 Jun 2026 to 07 Jun 2026 in Ciechanow, Poland. Top 10 Elo average was 1637, and top seed was Franciszek Serafin (🇵🇱 POL, 2004).
Oskar Mackowiak (🇵🇱 POL, 1443) won with 5.5/7, ahead of Konstanty Lewenstein (5.5) and Nikola Radomska (5.5).
The biggest upset came in round 6: Sergei Kostin (1502) beat Antoni Zawadzki (1808), a +306-point gap.
Location
🇵🇱Ciechanow, Poland
Dates
06 Jun 2026 → 07 Jun 2026
Time control
Standard: 60 minutes for game
System
Swiss · 7 rounds
Avg top 10
1,637
Participants
49
Federations · 1 represented
🇵🇱Poland×33
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsTight race until R7; 3 players tied at 5.5/7, decided on Buchholz.
Co-leaders
24
10
5
1
1
1
1
R7 · TIEBREAK CLUSTER
3 players finish on 5.5/7. Mackowiak takes the title on Buchholz Cut1 (25.5).
R4–R6 · WIN STREAK
Nikola Radomska won 3 in a row (R4–R6).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Nikola Radomska | * | — | — | ½ |
| 2Oskar Mackowiak | — | * | ½ | — |
| 3Konstanty Lewenstein | — | ½ | * | — |
| 4Stanislaw Szuszkiewicz | ½ | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mackowiak, Oskar | 1443 | POL | +45B | −20N | +22B | +15B | =2N | +7B | +8N | 5.5 | 25.5 | 26.5 | 20.25 | 1710 | +71.2 |
| 2 | Lewenstein, Konstanty | 1547 | POL | +36B | +44N | −4B | +32N | =1B | +19N | +11B | 5.5 | 24.0 | 25.0 | 17.25 | 1613 | +13.6 |
| 3 | Radomska, Nikola | 1624 | POL | +22B | +39N | −?B | +28N | +9B | +20N | =5B | 5.5 | 22.0 | 22.0 | 19.50 | 1906 | +58.0 |
| 4 | Wenedisiuk, Gleb | 1705 | POL | +25N | +8B | +2N | =?B | =6N | =10B | =9N | 5.0 | 27.5 | 27.5 | 20.50 | 1701 | +0.8 |
| 5 | Szuszkiewicz, Stanislaw | 1775 | POL | +19N | +11B | +15N | −?N | +21B | =8B | =3N | 5.0 | 25.5 | 25.5 | 20.50 | 1774 | +0.8 |
| 6 | Piniaz, Piotr | 1546 | POL | +43N | +17B | +7N | =9B | =4B | −?N | +14B | 5.0 | 24.0 | 24.0 | 19.25 | 1786 | +59.6 |
| 7 | Slawniak, Jakub | 1649 | POL | +16B | +14N | −6B | =10B | +17N | −1N | +19B | 4.5 | 27.0 | 30.5 | 17.75 | 1523 | -32.0 |
| 8 | Zawadzki, Jan | 1482 | POL | +48B | −4N | +16B | +36N | +12B | =5N | −1B | 4.5 | 26.5 | 27.5 | 14.50 | 1555 | +11.6 |
| 9 | Witecka, Aleksandra | 1468 | POL | +35B | =12N | +31B | =6N | −3N | +29B | =4B | 4.5 | 26.0 | 29.0 | 16.25 | 1660 | +62.8 |
| 10 | Trautsolt-Jeziorski, Mateusz | 1719 | POL | +13B | =21N | +12B | =7N | +14B | =4N | −?B | 4.5 | 26.0 | 26.0 | 19.50 | 1742 | +7.6 |
| 11 | Kostin, Sergei | 1502 | POL | +27B | −5N | +13B | =19N | +18B | +?B | −2N | 4.5 | 26.0 | 26.0 | 13.75 | 1452 | -9.6 |
| 12 | Walesiak-Batalha, Aleksander | 1643 | POL | +38N | =9B | −10N | +49B | −8N | +30B | +23B | 4.5 | 22.5 | 23.0 | 11.75 | 1283 | -53.6 |
| 13 | Gnatowicz, Szymon | 0 | POL | −10N | +41B | −11N | +42B | +36N | =21N | +20B | 4.5 | 20.5 | 22.5 | 11.75 | 1480 | 0.0 |
| 14 | Ponikowski, Ignacy | 1479 | POL | +47N | −7B | +25N | +30B | −10N | +16B | −6N | 4.0 | 24.5 | 25.5 | 11.50 | 838 | -35.6 |
| 15 | Trzcinski, Brajan | 1572 | POL | +37B | +24N | −5B | −1N | −19B | +33N | +32N | 4.0 | 23.5 | 26.0 | 12.00 | 1517 | -12.0 |
| 16 | FIDE 41817265 | 0 | — | −7N | +34B | −8N | +41B | +31B | −14N | +28B | 4.0 | 22.0 | 24.0 | 11.00 | 1447 | 0.0 |
| 17 | Mejszutowicz, Mateusz | 1430 | POL | +49B | −6N | +37B | =20N | −7B | =18N | +42B | 4.0 | 21.5 | 22.0 | 8.75 | 1347 | -16.8 |
| 18 | Lawicki, Kacper | 1409 | POL | −?N | +43B | =26N | +39B | −11N | =17B | +29N | 4.0 | 19.5 | 19.5 | 11.25 | 1568 | +43.6 |
| 19 | Dziegielewski, Krzysztof | 0 | POL | −5B | +27N | +29B | =11B | +15N | −2B | −7N | 3.5 | 27.0 | 30.0 | 12.75 | 1547 | 0.0 |
| 20 | Bernatowicz, Bohdan | 1557 | POL | +23N | +1B | −?N | =17B | +24N | −3B | −13N | 3.5 | 26.5 | 26.5 | 14.50 | 1576 | +3.2 |
| 21 | Bilynskyi-Slotylo, Oleksandr | 1489 | POL | +34N | =10B | =30N | +23B | −5N | =13B | −?N | 3.5 | 23.5 | 23.5 | 12.50 | 1554 | +5.2 |
| 22 | FIDE 91154006 | 0 | — | −3N | +47B | −1N | +44B | −26N | +34B | =24N | 3.5 | 22.0 | 23.0 | 6.75 | 1185 | 0.0 |
| 23 | Kwiatkowski, Maciej | 0 | POL | −20B | +45N | +39B | −21N | =28B | +26B | −12N | 3.5 | 20.5 | 21.5 | 8.50 | 1464 | 0.0 |
| 24 | Slesicki, Grzegorz | 1427 | POL | +42N | −15B | =49N | +26B | −20B | =27N | =22B | 3.5 | 20.0 | 20.5 | 9.25 | 1429 | +0.4 |
| 25 | Dabrowska, Gabriela | 0 | POL | −4B | +48N | −14B | +40N | −29B | =37N | +36B | 3.5 | 19.5 | 20.5 | 7.25 | 788 | 0.0 |
| 26 | Banasiuk, Filip | 1533 | POL | +40B | −?N | =18B | −24N | +22B | −23N | +37B | 3.5 | 19.5 | 19.5 | 10.50 | 1225 | -32.4 |
| 27 | FIDE 545037051 | 0 | — | −11N | −19B | +46N | =38B | +49N | =24B | =39N | 3.5 | 17.5 | 18.0 | 5.75 | 1330 | 0.0 |
| 28 | Reczkowski, Borys | 1465 | POL | =33N | =30B | +38N | −3B | =23N | =32B | −16N | 3.0 | 22.0 | 24.5 | 8.75 | 1331 | -14.0 |
| 29 | Winiarek, Jadwiga | 1579 | POL | −30N | +33B | −19N | +37B | +25N | −9N | −18B | 3.0 | 21.5 | 24.0 | 9.00 | 639 | -54.8 |
| 30 | FIDE 545038619 | 0 | — | +29B | =28N | =21B | −14N | =32B | −12N | =31B | 3.0 | 21.0 | 24.0 | 9.25 | 1464 | 0.0 |
| 31 | Adamczyk, Maciej | 1520 | POL | +41N | −?B | −9N | +34B | −16N | =36B | =30N | 3.0 | 19.0 | 19.0 | 7.75 | 668 | -22.8 |
| 32 | Michalak, Lilianna | 1423 | POL | −?B | +40N | +44B | −2B | =30N | =28N | −15B | 3.0 | 19.0 | 19.0 | 6.50 | 1255 | -22.8 |
| 33 | Zanko, Svyatoslav | 0 | POL | =28B | −29N | −36B | +48N | =38N | −15B | +41N | 3.0 | 17.0 | 18.0 | 5.75 | 1266 | 0.0 |
| 34 | Dziegielewski, Jakub | 0 | POL | −21B | −16N | +45B | −31N | +46B | −22N | +43B | 3.0 | 17.0 | 18.0 | 4.00 | 705 | 0.0 |
| 35 | Pikus, Mikolaj | 0 | POL | −9N | −38B | −41N | +43B | −37N | +47B | +44N | 3.0 | 14.5 | 15.5 | 4.00 | 668 | 0.0 |
| 36 | FIDE 41836677 | 0 | — | −2N | +42B | +33N | −8B | −13B | =31N | −25N | 2.5 | 24.0 | 26.0 | 6.50 | 1243 | 0.0 |
| 37 | Gurtatowski, Tymoteusz | 0 | POL | −15N | +46B | −17N | −29N | +35B | =25B | −26N | 2.5 | 21.0 | 22.0 | 5.75 | 729 | 0.0 |
| 38 | FIDE 91153905 | 0 | — | −12B | +35N | −28B | =27N | =33B | −42N | =40B | 2.5 | 19.5 | 21.5 | 7.50 | 754 | 0.0 |
| 39 | Kubiak, Adam | 1437 | POL | +46N | −3B | −23N | −18N | F | +41B | =27B | 2.5 | 19.5 | 20.5 | 4.75 | 717 | -32.0 |
| 40 | FIDE 91153921 | 0 | — | −26N | −32B | +47N | −25B | −42N | +49B | =38N | 2.5 | 15.5 | 16.0 | 2.75 | 678 | 0.0 |
| 41 | FIDE 545038627 | 0 | — | −31B | −13N | +35B | −16N | +45B | −39N | −33B | 2.0 | 20.0 | 21.0 | 4.00 | 679 | 0.0 |
| 42 | FIDE 545090726 | 0 | — | −24B | −36N | F | −13N | +40B | +38B | −17N | 2.0 | 19.5 | 19.5 | 5.00 | 629 | 0.0 |
| 43 | FIDE 545090718 | 0 | — | −6B | −18N | −48B | −35N | +44N | +46B | −34N | 2.0 | 17.0 | 18.0 | 2.00 | 678 | 0.0 |
| 44 | FIDE 91189470 | 0 | — | F | −2B | −32N | −22N | −43B | +45N | −35B | 1.0 | 18.0 | 18.0 | 1.00 | 685 | 0.0 |
| 45 | FIDE 91189497 | 0 | — | −1N | −23B | −34N | +47B | −41N | −44B | −46N | 1.0 | 16.0 | 17.0 | 1.00 | 643 | 0.0 |
| 46 | FIDE 545057877 | 0 | — | −39B | −37N | −27B | F | −34N | −43N | +45B | 1.0 | 14.5 | 14.5 | 1.00 | 637 | 0.0 |
| 47 | FIDE 41888367 | 0 | — | −14B | −22N | −40B | −45N | F | −35N | +49B | 1.0 | 14.5 | 14.5 | 0.50 | 679 | 0.0 |
| 48 | FIDE 545090700 | 0 | — | −8N | −25B | +43N | −33B | F | — | — | 1.0 | 13.5 | 15.5 | 2.00 | 682 | 0.0 |
| 49 | FIDE 91189454 | 0 | — | −17N | F | =24B | −12N | −27B | −40N | −47N | 0.5 | 19.0 | 19.0 | 1.75 | 1227 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Mackowiak, OskarPOL+71.25.5 pts · #4
- 2Witecka, AleksandraPOL+62.84.5 pts · #6
- 3Piniaz, PiotrPOL+59.65.0 pts · #3
Top rating losers
- 1Winiarek, JadwigaPOL-54.83.0 pts · #43
- 2Walesiak-Batalha, AleksanderPOL-53.64.5 pts · #25
- 3Ponikowski, IgnacyPOL-35.64.0 pts · #49
Biggest upsets
- R6+306 Elo gap
- R6+206 Elo gap
- R7+170 Elo gap