307th YMCA Autumn 2025-B Round 7-10
Round-RobinStandard
12 players participated in this 10-round tournament, held from 06 Nov 2025 to 27 Nov 2025 in Warszawa, Poland. 2 federations represented. Top 10 Elo average was 1868, and top seed was Wieslaw Kadzinski (🇵🇱 POL, 1911).
Jerzy Mazurek (🇵🇱 POL, 1899) won with 2.5/10, ahead of Marek Moskwinski (2.0) and Jakub Sucharski (2.0). Mazurek took the lead from round 9.
Location
🇵🇱Warszawa, Poland
Dates
06 Nov 2025 → 27 Nov 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 10 rounds
Federations · 2 represented
🇵🇱Poland×11
🇸🇪Sweden×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 12 · 10 roundsJerzy Mazurek led from R9 onwards, the runner-up race stayed tight. Title race converged from 12 co-leaders at R4 to 1 by R9.
Co-leaders
12
12
12
12
12
12
5
2
1
1
Mazurek#1Sucharski#2Moskwinski#3Kadzinski#4Bobinski#5Markiewicz#6Basiaga#7Pietrzak#8Pettersson#9Bartczak#10Kania#11Jaroszuk#12
R9–R10 · LEAD HELD
Jerzy Mazurek held the sole lead from R9 through R10 without losing it.
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇵🇱Mazurek, Jerzy | 1899 | * | 1 | — | 0 | — | — | ½ | — | — | — | — | 1 | 2.5 | 2.75 | 5.0 | +3.8 | 1935 |
| 3 | 🇵🇱Moskwinski, Marek | 1861 | 0 | * | — | — | 1 | 1 | — | — | — | — | — | — | 2.0 | 3.00 | 5.5 | +12.8 | 2020 |
| 2 | 🇵🇱Sucharski, Jakub | 1890 | — | — | * | — | — | — | — | — | 1 | 1 | — | — | 2.0 | 1.50 | 1.5 | +28.0 | 2578 |
| 8 | 🇵🇱Pietrzak, Wojciech | 1845 | 1 | — | — | * | — | ½ | — | 0 | — | — | — | — | 1.5 | 3.25 | 5.5 | +2.8 | 1880 |
| 4 | 🇵🇱Kadzinski, Wieslaw | 1911 | — | 0 | — | — | * | — | 1 | — | ½ | — | — | — | 1.5 | 2.00 | 4.5 | -4.0 | 1864 |
| 6 | 🇵🇱Markiewicz, Michal | 1875 | — | 0 | — | ½ | — | * | — | — | 1 | — | — | — | 1.5 | 1.75 | 4.5 | -2.6 | 1844 |
| 5 | 🇵🇱Bobinski, Lukasz | 1906 | ½ | — | — | — | 0 | — | * | — | — | — | — | 1 | 1.5 | 1.25 | 4.0 | -8.4 | 1852 |
| 7 | 🇵🇱Basiaga, Sebastian | 1866 | — | — | — | 1 | — | — | — | * | ½ | — | — | — | 1.5 | 2.00 | 2.5 | +8.2 | 2029 |
| 9 | 🇸🇪Pettersson, Alexander | 1826 | — | — | 0 | — | ½ | 0 | — | ½ | * | — | — | — | 1.0 | 1.50 | 6.5 | -13.2 | 1693 |
| 10 | 🇵🇱Bartczak, Hanna | 1730 | — | — | 0 | — | — | — | — | — | — | * | ½ | — | 0.5 | 0.25 | 2.5 | -4.0 | 1652 |
| 11 | 🇵🇱Kania, Tomasz | 1798 | — | — | — | — | — | — | — | — | — | ½ | * | — | 0.5 | 0.25 | 0.5 | -1.8 | 1730 |
| 12 | 🇵🇱Jaroszuk, Marcin | 1746 | 0 | — | — | — | — | — | 0 | — | — | — | — | * | 0.0 | 0.00 | 4.0 | -11.8 | 1102 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Sucharski, JakubPOL+28.02.0 pts · #2
- 2Moskwinski, MarekPOL+12.82.0 pts · #3
- 3Basiaga, SebastianPOL+8.21.5 pts · #7
Top rating losers
- 1Pettersson, AlexanderSWE-13.21.0 pts · #9
- 2Jaroszuk, MarcinPOL-11.80.0 pts · #12
- 3Bobinski, LukaszPOL-8.41.5 pts · #5