CChessStats

305th YMCA Summer 2025-B Round 8-10

Double Round-RobinStandard

8 players participated in this 10-round tournament, held from 05 Aug 2025 to 12 Aug 2025 in Warszawa, Poland. Top 10 Elo average was 1647, and top seed was Maciej Koniarski (🇵🇱 POL, 1989).

Jan Rybicki (🇵🇱 POL, 1594) won with 2.0/10, ahead of Konrad Kozera (2.0) and Mariusz Przybylik (2.0). Rybicki won on tie-break after catching the field in the final round.

The biggest upset came in round 10: Marcin Jaroszuk (1715) beat Maciej Koniarski (1989), a +274-point gap.

Location
🇵🇱Warszawa, Poland
Dates
05 Aug 2025 → 12 Aug 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Double RR · 10 rounds
Top seed
🇵🇱Maciej Koniarski1989
Avg top 10
1,647
Participants
8
Federations · 1 represented
🇵🇱Poland×8
Top 3

How it unfolded

Top 8 · 10 rounds

Title race narrowed from 8 co-leaders at R4 to 5 at the finish.

Co-leaders
8
8
8
8
8
8
8
4
2
5
#1#2#4#8R1R2R3R4R5R6R7R8R9R10
Koniarski#1Jaroszuk#2Rybicki#3Kozera#4Przybylik#5Kumik#6Moszczynski-Petkowski#7Sypula#8
R10 · HEAD-TO-HEAD · WINNER VS 2ND

Maciej Koniarski lost to Marcin Jaroszuk (Black).

Cross-table

#PlayerElo12345678PtsSBBhΔ EloPerf
3🇵🇱Rybicki, Jan1594*10———1—2.02.004.0+3.81648
4🇵🇱Kozera, Konrad15370*1———1—2.02.004.0+10.01666
5🇵🇱Przybylik, Mariusz153010*———1—2.02.004.0+11.01668
2🇵🇱Jaroszuk, Marcin1715———*10—12.02.003.0+13.61896
1🇵🇱Koniarski, Maciej1989———0*1—12.01.003.0-23.21804
6🇵🇱Kumik, Michal1625———10*——1.02.004.0+20.81853
7🇵🇱Moszczynski-Petkowski, Rafal1492000———*—0.00.006.0-49.6756
8🇵🇱Sypula, Krzysztof1697———00——*0.00.004.0-12.41053

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets