CChessStats

Mistrzostwa Wielkopolski Juniorow w szachach klasycznych 2025 [GRUPA CD17] chlopcy ur. 2007-2009

Open SwissStandard

26 players participated in this 9-round tournament, held from 11 Jun 2025 to 15 Jun 2025 in Sypniewo k. Jastrowia, Poland. Top 10 Elo average was 1748, and top seed was Tymoteusz Lachacz (🇵🇱 POL, 1884).

Marcin Pyrek (🇵🇱 POL, 1847) won with 8.0/9, ahead of Jakub Kolinski (6.5) and Oskar Rothe (6.0). Pyrek won solo starting round 4.

The biggest upset came in round 1: Oskar Rothe (1543) beat Tymoteusz Lachacz (1884), a +341-point gap.

Location
🇵🇱Sypniewo k. Jastrowia, Poland
Dates
11 Jun 2025 → 15 Jun 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇵🇱Tymoteusz Lachacz1884
Avg top 10
1,748
Participants
26
Federations · 1 represented
🇵🇱Poland×25
Top 3

How it unfolded

Top 6 · 9 rounds

Marcin Pyrek led from R4; +1.5-point edge over the runner-up.

Co-leaders
12
6
3
1
1
1
1
1
1
2.54.579R1R2R3R4R5R6R7R8R9
Pyrek8Kolinski6.5Rothe6Kordusiak6Oszutowska5.5Wieczorek5.5
R4–R9 · LEAD HELD

Marcin Pyrek never relinquished the lead after R4; final gap +1.5 over the runner-up.

R6 · HEAD-TO-HEAD · WINNER VS 2ND

Marcin Pyrek drew with Jakub Kolinski (Black).

WIN STREAKS · 3 top finishers

Marcin Pyrek 4+3 wins (R1–R4, R7–R9)Jakub Kolinski 4 wins (R2–R5)Oskar Rothe 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Marcin Pyrek*
½
1
—
2Jakub Kolinski
½
*
0
—
3Oskar Rothe
0
1
*—
4Jan Kordusiak———*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Pyrek, Marcin1847POL+23B+24N+8B+7N=10B=2N+9B+3N+11B8.040.042.036.252051+72.8
2Kolinski, Jakub1770POL−22N+19B+23N+5B+7N=1B−3N+12B+9N6.541.043.531.001817+27.6
3Rothe, Oskar1543POL+9B+11N−7B=8N+13B+10N+2B−1B=5N6.045.049.531.251878+155.2
4Kordusiak, Jan1645POL+25B−7N+26B−13N−9B+19N+20B+10N+8B6.033.533.519.001722+33.6
5Oszutowska, Anna1750POL+14B+13N+10B−2N+18B−9N=8B=11N=3B5.541.545.526.001731-5.6
6Wieczorek, Maksymilian1502POL−8N−17B−16N=21B+25N+26B+22N+14B+13B5.529.529.514.251603+38.4
7Kolendo, Kajetan1733POL+15N+4B+3N−1B−2B=8N=10B=13N=12N5.046.050.526.251704-14.8
8Wisniarek, Jakub1727POL+6B+18N−1N=3B+12N=7B=5N=9B−4N5.046.050.025.251684-17.2
9Lachacz, Tymoteusz1884POL−3N+22B=12N+23B+4N+5B−1N=8N−2B5.044.547.021.501698-77.6
10Skrzypczak, Wiktor1708POL+20B+26N−5N+14B=1N−3B=7N−4B+17N5.043.043.019.001640-27.2
11Zadon, Jakub1725POL+19N−3B=22N−12B+15N+18N+17B=5B−1N5.041.043.520.501608-46.8
12Kosecki, Oskar1569POL−18B+20N=9B+11N−8B+24N+13B−2N=7B5.039.041.020.501794+94.0
13Pieczewska, Jadwiga1635POL+21N−5B+15N+4B−3N+14B−12N=7B−6N4.542.045.521.001552-36.8
14Szczepaniak, Jan1514POL−5N+21B+24B−10N+17B−13N+18B−6N=16B4.536.538.515.751519-1.6
15Swiderska, Jagoda1510POL−7B+25N−13B+26N−11B−17N=19B+18N+22B4.530.030.09.501490-9.6
16Kajzderski, Marcel1423POL−24B−23N+6B−17N−20B+25N+26N+21B=14N4.527.027.012.251429-1.2
17Borkowski, Pawel1648POLF+6N−18B+16B−14N+15B−11N+20N−10B4.037.037.018.501595-17.6
18Nowak, Franciszek0POL+12N−8B+17N+22B−5N−11B−14N−15B+25N4.036.037.012.5015520.0
19Lewandowski, Mikolaj1485POL−11B−2N+25B=24N=22N−4B=15N+23B=21N4.032.533.59.751555+25.6
20Koza, Krzysztof1439POL−10N−12B−21N+25B+16N+23B−4N−17B+26B4.031.531.58.001511+23.2
21Mazurek, Oskar0POL−13B−14N+20B=6N=24B=22B=23N−16N=19B3.532.034.012.2514450.0
22Gustowski, Dawid1517POL+2B−9N=11B−18N=19B=21N−6BF−15N2.538.038.012.751520-4.4
23Anczarski, Wiktor1530POL−1N+16B−2B−9N+26B−20N=21B−19NF2.535.535.56.251368-50.8
24Buchwald, Filip1683POL+16N−1B−14N=19B=21N−12BFFF2.029.529.58.251418-69.6
25Pisznot, Wiktor1404POL−4N−15B−19N−20N−6B−16BF+26N−18B1.032.532.50.00700-89.6
26FIDE 210630280—F−10B−4N−15B−23N−6N−16B−25B−20N0.033.033.00.007200.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets