CChessStats

I Otwarte Mistrzostwa Inowroclawia w Szachach Klasycznych - OPEN B

Open SwissStandard

31 players participated in this 7-round tournament, held from 07 Jun 2025 to 08 Jun 2025 in Inowroclaw, Poland. Top 10 Elo average was 1565, and top seed was Karol Borowiak (🇵🇱 POL, 1648).

Mateusz Posselt (🇵🇱 POL, 1562) won with 6.0/7, ahead of Karol Borowiak (5.5) and Michal Szargiej (5.5). Posselt won solo starting round 4.

The biggest upset came in round 5: Pawel Czekalski (1411) beat Hubert Januzik (1615), a +204-point gap.

Location
🇵🇱Inowroclaw, Poland
Dates
07 Jun 2025 → 08 Jun 2025
Time control
Standard: 30 minutes for game with 30 seconds increment from move 1
System
Swiss · 7 rounds
Top seed
🇵🇱Karol Borowiak1648
Avg top 10
1,565
Participants
31
Federations · 1 represented
🇵🇱Poland×30
Top 3

How it unfolded

Top 6 · 7 rounds

Mateusz Posselt led from R4; +0.5-point edge over the runner-up.

Co-leaders
13
7
3
1
1
1
1
23.55.57R1R2R3R4R5R6R7
Posselt6Borowiak5.5Szargiej5.5Pocwiardowski5.5Zajaczkowski5Czekalski5
R4–R7 · LEAD HELD

Mateusz Posselt held the sole lead from R4 through R7 without losing it.

R7 · HEAD-TO-HEAD · WINNER VS 2ND

Mateusz Posselt lost to Karol Borowiak (Black).

WIN STREAKS · 2 top finishers

Mateusz Posselt 6 wins (R1–R6)Michal Szargiej 3 wins (R4–R6)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Mateusz Posselt*
0
1
1
2Karol Borowiak
1
*—
½
3Michal Szargiej
0
—*—
4Pawel Pocwiardowski
0
½
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Posselt, Mateusz1562POL+19N+9B+3N+4B+5N+10B−2N6.029.532.527.001825+82.4
2Borowiak, Karol1648POL+17N+14B=4N=23B=10N+7B+1B5.527.530.024.001779+33.2
3Szargiej, Michal1504POL+27N+23B−1B+15N+7B+9N=5N5.525.527.519.001675+21.6
4Pocwiardowski, Pawel1553POL+26N+29B=2B−1N+23N+12B+8B5.524.025.016.251598+7.6
5Zajaczkowski, Kevin1534POL+20B+28N+8B=7N−1B+11N=3B5.027.029.018.001571+10.4
6Czekalski, Pawel1411POL−8B−25N+30B+27N+15B+19N+9B5.018.518.512.501696+22.4
7Nakielski, Lukasz1434POL+15N+10B+16N=5B−3N−2N+24B4.527.029.516.001574+37.2
8Klym, Witold1602POL+6N+21B−5N+19B−9N+16B−4N4.026.029.014.501429-45.6
9Pazderski, Piotr1502POL+30B−1N+28B+18N+8B−3B−6N4.026.026.09.501324-36.4
10Turek, Michal1556POL+31B−7N+20B+25N=2B−1N=11B4.025.025.09.751316-49.2
11Bielicki, Emil1406POL−23N+24B+29N+21B=16N−5B=10N4.020.521.510.251531+20.4
12Yu, Jie1487POL−28B−26N+13B+20N+25B−4N+19B4.019.521.512.0014980.0
13Dzieciol, Wiktor1453POL=18N−16B−12N+29B=22B+25N+20B4.019.020.09.251490+2.8
14Karczewski, Lukasz1512POL+24N−2N−25B−16B+30N+26B+27N4.017.517.56.50854-12.4
15Januzik, Hubert1615POL−7B+31N+18N−3B−6N+17B=16N3.525.525.58.751258-74.8
16Wilmanski, Brus0POL=22B+13N−7B+14N=11B−8N=15B3.524.027.013.2514990.0
17Banach, Bartosz1441POL−2B−20N+31B=24N+18B−15N+23N3.520.520.57.25835-20.0
18Zmudzinski, Kasjan0POL=13B+22N−15B−9B−17N+30N+25B3.520.020.07.0013500.0
19Madajewski, Borys0POL−1B+30N+22B−8N+21N−6B−12N3.025.025.06.0014370.0
20Szczepaniak, Tomasz0POL−5N+17B−10N−12B+28N+21B−13N3.023.525.58.5014240.0
21Kazmierczak, Kacper1506POL+25B−8N+27B−11N−19B−20N+29B3.018.019.05.00701-40.8
22Gryczewski, Tomasz1491POL=16N−18B−19N+31B=13N−27B+26N3.018.018.05.751443-1.4
23Biesaga, Krzysztof1564POL+11B−3N+26B=2N−4B−24N−17B2.526.528.58.7513650.0
24Zak, Maciej0POL−14B−11NF=17B+26N+23B−7N2.520.520.56.2511260.0
25Klosowski, Rafal0POL−21N+6B+14N−10B−12N−13B−18N2.024.527.59.0014120.0
26Plocha, Oskar0POL−4B+12B−23N+28N−24B−14N−22B2.021.523.56.007170.0
27Pomarzynski, Michal0POL−3BF−21N−6B+29N+22N−14B2.021.521.54.0012460.0
28FIDE 911447440—+12N−5B−9N−26B−20B−29N+30B2.019.019.04.007180.0
29Derenda, Nadia0POLF−4N−11B−13N−27B+28B−21N1.020.520.52.006770.0
30Rak, Krzesimir0POL−9N−19B−6NF−14B−18B−28N0.021.521.50.006740.0
31Pingot, Marcel0POL−10N−15B−17N−22NF——0.014.014.00.007250.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets