CChessStats

Otwarty Turniej Szachowy OPEN COPPER

Open SwissStandard

14 players participated in this 9-round tournament, held from 25 May 2025 to 31 May 2025 in Legnica, Poland. 2 federations represented. Top 10 Elo average was 1799, and top seed was Radoslaw Czachor (🇵🇱 POL, 2071).

Antoni Komendecki (🇵🇱 POL, 2052) won with 7.5/9, ahead of Radoslaw Czachor (7.0) and Marek Lasok (6.5). Komendecki won solo starting round 4.

The biggest upset came in round 5: Daria Repetilo (1771) beat Jacek Komendecki (1984), a +213-point gap.

Location
🇵🇱Legnica, Poland
Dates
25 May 2025 → 31 May 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇵🇱Radoslaw Czachor2071
Avg top 10
1,799
Participants
14
Federations · 2 represented
🇵🇱Poland×12
🇺🇦Ukraine×1
Top 3

How it unfolded

Top 6 · 9 rounds

Antoni Komendecki led from R4; +0.5-point edge over the runner-up.

Co-leaders
6
3
3
1
1
1
1
1
1
2.54.579R1R2R3R4R5R6R7R8R9
Komendecki7.5Czachor7Lasok6.5Komendecki6Repetilo6Marek4.5
R4–R9 · LEAD HELD

Antoni Komendecki held the sole lead from R4 through R9 without losing it.

R3 · HEAD-TO-HEAD · WINNER VS 2ND

Antoni Komendecki drew with Radoslaw Czachor (White).

WIN STREAKS · 3 top finishers

Antoni Komendecki 4 wins (R4–R7)Radoslaw Czachor 4 wins (R6–R9)Marek Lasok 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Antoni Komendecki*
½
1
½
2Radoslaw Czachor
½
*
0
1
3Marek Lasok
0
1
*
½
4Jacek Komendecki
½
0
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Komendecki, Antoni2052POL+9B+7N=2B+3N+10N+6B+5N=4N=8B7.540.543.535.252080+16.0
2Czachor, Radoslaw2071POL+8N+4B=1N=5B−3N+10B+11N+9B+7N7.039.542.529.252023-3.2
3Lasok, Marek2018POL+14N+5B=4N−1B+2B+9N+10N=7B=6N6.541.041.026.252003+3.0
4Komendecki, Jacek1984POL+12B−2N=3B+7N−5B+8N+6N=1B+9N6.042.043.023.001907-9.8
5Repetilo, Daria1771UKR+10B−3N+9B=2N+4N=7B−1B+11N+12B6.040.041.021.501907+56.4
6Marek, Mateusz0POLF+14B+8N−10B+11N−1N−4B+12N=3B4.530.530.510.751842+70.4
7Owad, Jakub1806POL+11N−1B−10N−4B+14N=5N+12B=3N−2B4.040.040.010.251804+2.8
8Kopinski, Miroslaw1616POL−2B+12N−6B−9NF−4B+14B+10N=1N3.533.033.07.751723+9.8
9Kulczycki, Oliwier1579POL−1N+11B−5N+8B+12N−3BF−2N−4B3.040.540.57.501699+30.4
10Czuba, Tadeusz0POL−5NF+7B+6N−1B−2N−3B−8B+14N3.039.039.08.5016810.0
11Kolak, Kacper1463POL−7B−9N+12B+13N−6B+14N−2B−5BF3.026.526.52.001557+24.4
12Lisak, Jerzy1542POL−4N−8B−11N+14B−9BF−7N−6B−5N1.031.031.00.001363-28.8
13FIDE 5450228870—FF+14N−11BFF———1.07.57.50.0014980.0
14Sabuk, Jan1546POL−3B−6N−13B−12N−7B−11B−8NF−10B0.026.526.50.00871-72.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets