CChessStats

Miedzynarodowy Turniej Szachowy o korone Boleslawa Chrobrego - OPEN A.

Open SwissStandard

12 players participated in this 5-round tournament, held from 29 Nov 2025 to 30 Nov 2025 in Gniezno, Poland. 5 titled players. Top 10 Elo average was 2030, and top seed was Krzysztof Chojnacki (🇵🇱 POL, IM, 2283).

Marcin Pilzak (🇵🇱 POL, CM, 2181) won with 4.0/5, ahead of Karol Stanislawski (3.5) and Kacper Kilarski (3.5). Pilzak broke clear in the final round.

The biggest upset came in round 4: Kacper Kilarski (1870) beat Tymoteusz Hury (CM, 2104), a +234-point gap.

Location
🇵🇱Gniezno, Poland
Dates
29 Nov 2025 → 30 Nov 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Top seed
🇵🇱IMKrzysztof Chojnacki2283
Avg top 10
2,030
Participants
12
Titled players · 5
IM×1
CM×3
WFM×1
Federations · 1 represented
🇵🇱Poland×12
Top 3

How it unfolded

Top 6 · 5 rounds

CM Marcin Pilzak led from R2; +0.5-point edge over the runner-up.

Co-leaders
6
1
2
3
1
1.52.545R1R2R3R4R5
Pilzak4Kilarski3.5Stanislawski3.5Szeszycki3Hury2.5Chojnacki2.5
R2–R5 · LEAD HELD

CM Marcin Pilzak held the sole lead from R2 through R5 without losing it.

R2 · HEAD-TO-HEAD · WINNER VS 2ND

CM Marcin Pilzak beat Kacper Kilarski (Black).

R1–R5 · UNBEATEN

CM Marcin Pilzak went unbeaten across 5 games (R1–R5).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1CMMarcin Pilzak*
1
½
1
2Kacper Kilarski
0
*
½
—
3Karol Stanislawski
½
½
*—
4Jan Szeszycki
0
——*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Pilzak, MarcinCM2181POL+4B+3N=5B=2N+8B4.012.514.511.502243+8.4
2Stanislawski, Karol1929POL+6B=5N+7B=1B=3N3.512.515.010.002201+68.0
3Kilarski, Kacper1870POL+9N−1B+12N+6N=2B3.512.012.06.252194+83.2
4Szeszycki, Jan1937POL−1N−9B+11N+7B+10N3.010.010.04.002028+24.4
5Chojnacki, KrzysztofIM2283POL+12N=2B=1NF=6B2.512.012.05.002145-6.1
6Hury, TymoteuszCM2104POL−2N+12B+8N−3B=5N2.511.511.53.252012-12.2
7Bialkowski, Jan1824POL+10B=8B−2N−4N+11B2.510.010.02.501923+28.0
8Bilochenko, MatviiCM1991POL+11B=7N−6B=10N−1N2.010.510.52.001900-23.6
9Matskevich, VarvaraWFM2024POL−3B+4N+10BF—2.09.010.54.502063+6.0
10Wites, Adam2001POL−7N+11B−9N=8B−4B1.59.59.51.001756-64.8
11Kujawski, Zygmunt1756POL−8N−10N−4BF−7N0.09.09.00.001136-21.8
12Hrynkiewicz, Bartosz1984POL−5B−6N−3BF—0.08.58.50.001287-22.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets