CChessStats

WTK1 2025.07. (na jedynke)

Open SwissStandard

14 players participated in this 9-round tournament, held from 31 Jul 2025 to 02 Aug 2025 in Wagrowiec, Poland. Top 10 Elo average was 1511, and top seed was Oskar Kosecki (🇵🇱 POL, 1662).

Franciszek Zielski (🇵🇱 POL, 0) won with 6.0/9, ahead of Maciej Gruszczynski (6.0) and Bartosz Banach (6.0). Zielski won on tie-break after catching the field in the final round.

The biggest upset came in round 2: Marcel Kajzderski (1422) beat Mateusz Czerwinski (1641), a +219-point gap.

Location
🇵🇱Wagrowiec, Poland
Dates
31 Jul 2025 → 02 Aug 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 9 rounds
Top seed
🇵🇱Oskar Kosecki1662
Avg top 10
1,511
Participants
14
Federations · 1 represented
🇵🇱Poland×14
Top 3

How it unfolded

Top 6 · 9 rounds

Tight race until R9; 3 players tied at 6.0/9, decided on Buchholz.

Co-leaders
4
2
1
1
1
3
1
1
3
2.54.579R1R2R3R4R5R6R7R8R9Kajzderski takes leadGruszczynski takes lead
Zielski6Banach6Gruszczynski6Kabatek—Kajzderski—Bubniewicz4.5
R5 · LEADER CHANGE01 Aug

Marcel Kajzderski takes the sole lead (4.0/5).

R9 · TIEBREAK CLUSTER

3 players finish on 6.0/9. Zielski takes the title on Buchholz Cut1 (37.5).

R3 · HEAD-TO-HEAD · WINNER VS 2ND

Franciszek Zielski beat Bartosz Banach (White).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Franciszek Zielski*
1
0
½
2Bartosz Banach
0
*
1
0
3Maciej Gruszczynski
1
0
*
0
4Lukasz Kabatek
½
1
1
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Zielski, Franciszek0POL+6N−7N+3B=4N+8B=5B−2N+12B+10N6.037.539.524.5015330.0
2Gruszczynski, Maciej1448POL+8N+13B+7B=5N−4B+10N+1B−3B=6N6.037.538.522.751539+15.0
3Banach, Bartosz1448POL=11B=9N−1N+6B+7B−4N+10B+2N+12N6.035.037.022.751660+89.2
4Kabatek, Lukasz1500POL=5N+12B=8N=1B+2N+3B=7N——5.031.033.023.501692+60.0
5Kajzderski, Marcel1422POL=4B+11N+13B=2B+9N=1N=8B——5.027.528.518.001726+94.8
6Bubniewicz, Marcin1453POL−1B+10N−9B−3N+14B=11N=12N+7B=2B4.533.534.513.501440-6.4
7Koza, Krzysztof1463POL+10N+1B−2N=9B−3N+12B=4B−6NF4.036.036.015.251348-36.4
8Kosecki, Oskar1662POL−2B+14N=4B+12N−1N+9B=5N——4.027.528.511.501548-28.4
9Berlik, Monika1435POL=12N=3B+6N=7N−5B−8N+11B——3.526.528.513.501518+30.0
10Cerajewski, Antoni0POL−7B−6B+14N+13N+12B−2B−3N−11N−1B3.032.533.54.0013420.0
11Czerwinski, Mateusz1641POL=3N−5B−12N−14B+13N=6B−9N+10B—3.025.026.09.251341-94.4
12Piechocki, Bronislaw1562POL=9B−4N+11B−8B−10N−7N=6B−1N−3B2.036.039.07.001353-39.8
13Trojanowska, Alicja1498POL+14B−2N−5N−10B−11B————1.017.018.01.00708-58.8
14Dolot, Wieslaw0POL−13N−8B−10B+11N−6NFF——1.015.515.53.0013710.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets