307th YMCA Autumn 2025-B Round 2-5
Round-RobinStandard
12 players participated in this 5-round tournament, held from 02 Oct 2025 to 23 Oct 2025 in Warszawa, Poland. 2 federations represented. Top 10 Elo average was 1866, and top seed was Lukasz Bobinski (🇵🇱 POL, 1930).
Wojciech Pietrzak (🇵🇱 POL, 1804) won with 4.0/5, ahead of Jakub Sucharski (3.5) and Tomasz Kania (3.0). Pietrzak won solo starting round 4.
The biggest upset came in round 3: Hanna Bartczak (1728) beat Lukasz Bobinski (1930), a +202-point gap.
Location
🇵🇱Warszawa, Poland
Dates
02 Oct 2025 → 23 Oct 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 5 rounds
Federations · 2 represented
🇵🇱Poland×11
🇸🇪Sweden×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 12 · 5 roundsWojciech Pietrzak led from R4 onwards, the runner-up race stayed tight.
Co-leaders
1
1
2
1
1
Pietrzak#1Sucharski#2Kania#3Markiewicz#4Jaroszuk#5Bobinski#6Pettersson#7Kadzinski#8Bartczak#9Mazurek#10Moskwinski#11Basiaga#12
R4 · LEADER CHANGE16 Oct
Wojciech Pietrzak takes the sole lead (3.0/4).
WIN STREAKS · 2 top finishers
Wojciech Pietrzak 4 wins (R2–R5)Jakub Sucharski 3 wins (R3–R5)
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇵🇱Pietrzak, Wojciech | 1804 | * | — | 1 | — | — | 1 | — | 1 | — | — | 1 | — | 4.0 | 7.50 | 7.5 | +41.0 | 2612 |
| 2 | 🇵🇱Sucharski, Jakub | 1812 | — | * | — | 1 | — | — | 1 | — | ½ | — | 1 | — | 3.5 | 6.25 | 7.0 | +72.8 | 2207 |
| 3 | 🇵🇱Kania, Tomasz | 1775 | 0 | — | * | — | 1 | ½ | — | — | — | ½ | 1 | — | 3.0 | 5.25 | 11.0 | +22.8 | 1941 |
| 5 | 🇵🇱Jaroszuk, Marcin | 1734 | — | 0 | — | * | ½ | ½ | — | ½ | — | — | — | 1 | 2.5 | 4.00 | 10.5 | +12.4 | 1827 |
| 4 | 🇵🇱Markiewicz, Michal | 1868 | — | — | 0 | ½ | * | — | — | — | 1 | 1 | — | — | 2.5 | 4.25 | 8.5 | +6.6 | 1933 |
| 7 | 🇸🇪Pettersson, Alexander | 1837 | 0 | — | ½ | ½ | — | * | 0 | — | — | — | 1 | — | 2.0 | 3.75 | 12.5 | -11.0 | 1758 |
| 6 | 🇵🇱Bobinski, Lukasz | 1930 | — | 0 | — | — | — | 1 | * | 0 | — | — | — | 1 | 2.0 | 3.00 | 8.0 | -24.4 | 1816 |
| 9 | 🇵🇱Bartczak, Hanna | 1728 | 0 | — | — | ½ | — | — | 1 | * | — | — | 0 | — | 1.5 | 3.25 | 9.5 | +2.0 | 1757 |
| 10 | 🇵🇱Mazurek, Jerzy | 1912 | — | ½ | — | — | 0 | — | — | — | * | ½ | — | ½ | 1.5 | 3.00 | 8.5 | -14.2 | 1787 |
| 8 | 🇵🇱Kadzinski, Wieslaw | 1928 | — | — | ½ | — | 0 | — | — | — | ½ | * | — | ½ | 1.5 | 2.75 | 8.0 | -17.2 | 1774 |
| 11 | 🇵🇱Moskwinski, Marek | 1907 | 0 | 0 | 0 | — | — | 0 | — | 1 | — | — | * | — | 1.0 | 1.50 | 14.0 | -45.6 | 1551 |
| 12 | 🇵🇱Basiaga, Sebastian | 1887 | — | — | — | 0 | — | — | 0 | — | ½ | ½ | — | * | 1.0 | 1.50 | 7.5 | -21.0 | 1683 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Sucharski, JakubPOL+72.83.5 pts · #2
- 2Pietrzak, WojciechPOL+41.04.0 pts · #1
- 3Kania, TomaszPOL+22.83.0 pts · #3
Top rating losers
- 1Moskwinski, MarekPOL-45.61.0 pts · #11
- 2Bobinski, LukaszPOL-24.42.0 pts · #6
- 3Basiaga, SebastianPOL-21.01.0 pts · #12
Biggest upsets
- R3+202 Elo gap
- R4+153 Elo gap
- R1+132 Elo gap