CChessStats

Eliminacje Strefowe PL-LU Bialystok 2025 - C13

Open SwissStandard

15 players participated in this 9-round tournament, held from 10 Sept 2025 to 14 Sept 2025 in Bialystok, Poland. Top 10 Elo average was 1695, and top seed was Jan Businski (🇵🇱 POL, 1909).

Antoni Pieszko (🇵🇱 POL, 1738) won with 8.0/9, ahead of Jakub Szuminski (7.0) and Milosz Madejski (6.5). Pieszko shared the lead from round 4 and won solo starting round 5.

The biggest upset came in round 8: Piotr Smolko (1503) beat Jan Businski (1909), a +406-point gap.

Location
🇵🇱Bialystok, Poland
Dates
10 Sept 2025 → 14 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇵🇱Jan Businski1909
Avg top 10
1,695
Participants
15
Federations · 1 represented
🇵🇱Poland×15
Top 3

How it unfolded

Top 6 · 9 rounds

Antoni Pieszko led from R5; +1.0-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders
6
2
4
2
1
1
1
1
1
2.54.579R1R2R3R4R5R6R7R8R9
Pieszko8Szuminski7Madejski6.5Wnorowski6Businski5.5Micor4.5
R5–R9 · LEAD HELD

Antoni Pieszko never relinquished the lead after R5; final gap +1.0 over the runner-up.

R5 · HEAD-TO-HEAD · WINNER VS 2ND

Antoni Pieszko beat Jakub Szuminski (Black).

2× WIN STREAK · 3+3 wins

Antoni Pieszko posted 3 in a row (R3–R5) and 3 in a row (R7–R9) — total 6 wins.

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Antoni Pieszko*
1
½
½
2Jakub Szuminski
0
*
1
½
3Milosz Madejski
½
0
*
1
4Wiktor Wnorowski
½
½
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Pieszko, Antoni1738POL+12B=4N+10B+5B+2N=3B+6N+7N+11B8.040.544.037.752039+106.8
2Szuminski, Jakub1847POL+7N+15B=5N+3B−1B+8N=4N+9B+10N7.041.541.527.751886+26.4
3Madejski, Milosz1898POL=10B+6N+4B−2N+11B=1N=5B+15N+12B6.541.541.526.001806-20.4
4Wnorowski, Wiktor1909POL+11N=1B−3N+7B+10N=5N=2B+6B=8N6.043.046.527.751794-34.4
5Businski, Jan1909POL+6B+9N=2B−1N+8N=4B=3N−10B+13N5.543.545.023.751730-58.0
6Micor, Igor1539POL−5N−3B+12N+13B+14B=9N−1B−4N+15B4.536.536.58.501428-22.4
7Milewski, Filip0POL−2B+13N=9B−4NF+10N=11B−1B+14N4.035.035.010.251541-6.4
8Pawluczuk, Maciej1564POL+13B−10N+14B+11N−5B−2B=12NF=4B4.032.032.011.251580+0.8
9Toczylowski, Mateusz1535POL+14N−5B=7N−10B+13N=6B+15B−2NF4.027.527.57.251424-28.4
10Smolko, Piotr1503POL=3N+8B−1N+9N−4B−7BF+5N−2B3.545.045.016.751689+65.6
11Masiewicz, Kacper1506POL−4B+12N+15N−8B−3NF=7N+14B−1N3.533.533.57.001357-29.6
12Skrzypczak, Jakub1419POL−1N−11B−6BF+15N+14N=8B+13B−3N3.529.529.55.0012770.0
13Jazgarski, Wojciech0POL−8N−7BF−6N−9B+15N=14B−12N−5B1.527.027.00.758100.0
14Drewniak, Jan0POL−9BF−8N+15B−6N−12B=13N−11N−7B1.525.025.00.757280.0
15Jasik, Kacper0POLF−2N−11B−14N−12B−13B−9N−3B−6N0.032.032.00.008600.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets