CChessStats

309th YMCA Autumn 2025-D Round 11-13

Round-RobinStandard

12 players participated in this 13-round tournament, held from 02 Dec 2025 to 16 Dec 2025 in Warszawa, Poland. Top 10 Elo average was 1532, and top seed was Marcin Dzierzko (🇵🇱 POL, 1703).

Rafal Moszczynski-Petkowski (🇵🇱 POL, 1436) won with 2.0/13, ahead of Wojciech Sloniewski (2.0) and Radoslaw Matyszkiewicz (2.0). Moszczynski-Petkowski won on tie-break after catching the field in the final round.

The biggest upset came in round 11: Wojciech Sloniewski (1436) beat Aisha Martin (1645), a +209-point gap.

Location
🇵🇱Warszawa, Poland
Dates
02 Dec 2025 → 16 Dec 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 13 rounds
Top seed
🇵🇱Marcin Dzierzko1703
Avg top 10
1,532
Participants
12
Federations · 1 represented
🇵🇱Poland×12
Top 3

How it unfolded

Top 12 · 13 rounds

Title race narrowed from 12 co-leaders at R4 to 3 at the finish.

Co-leaders
12
12
12
12
12
12
12
12
12
12
4
1
3
#1#2#6#12R1R2R3R4R5R6R7R8R9R10R11R12R13

Cross-table

#PlayerElo123456789101112PtsSBBhΔ EloPerf
2🇵🇱Moszczynski-Petkowski, Rafal1436*½½12.01.753.0+24.81579
3🇵🇱Sloniewski, Wojciech1436*0112.00.502.0+35.21641
1🇵🇱Matyszkiewicz, Radoslaw1558*½½12.00.501.0+8.21646
5🇵🇱Przybylik, Mariusz14961*½1.52.252.5+13.61753
4🇵🇱Chojnacki, Grzegorz1478½*11.51.002.0+13.21622
9🇵🇱Mackiewicz, Anna1618½*½1.01.252.5+0.21423
6🇵🇱Martin, Aisha16450½*0.51.004.0-35.61291
10🇵🇱Florczak, Witold14640½*0.51.004.0-8.41291
8🇵🇱Dzierzko, Marcin1703½*0.50.751.5-10.81484
7🇵🇱Golebiowski, Sebastian0½*0.50.501.00.01418
12🇵🇱Grad, Krzysztof143500*0.00.003.5-37.6656
11🇵🇱Dabrowski, Leszek14890*0.00.002.0-8.2745

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets