CChessStats

Salongernas Chess Challenge 2025

Open SwissStandard

18 players participated in this 9-round tournament, held from 28 May 2025 to 01 Jun 2025 in Stockholm, Sweden. 2 titled players from 3 federations. Top 10 Elo average was 1993, and top seed was Jonathan Westerberg (🇸🇪 SWE, GM, 2478).

Jonathan Westerberg (🇸🇪 SWE, GM, 2478) won with 8.0/9, ahead of Lukas Willstedt (6.5) and Sebastian Shi (6.0). Westerberg won solo starting round 3.

The biggest upset came in round 5: Lukas Willstedt (2057) beat Jonathan Westerberg (GM, 2478), a +421-point gap.

Location
🇸🇪Stockholm, Sweden
Dates
28 May 2025 → 01 Jun 2025
Time control
Standard: 90 minutes for first 40 moves and 15 min. for the rest of the game with 30 sec. increment from move 1
System
Swiss · 9 rounds
Top seed
🇸🇪GMJonathan Westerberg2478
Avg top 10
1,993
Participants
18
Titled players · 2
GM×1
CM×1
Federations · 3 represented
🇸🇪Sweden×16
🇫🇷France×1
🇳🇿New Zealand×1
Top 3

How it unfolded

Top 6 · 9 rounds

GM Jonathan Westerberg led from R3; +1.5-point edge over the runner-up.

Co-leaders
7
3
1
1
1
1
1
1
1
2.54.579R1R2R3R4R5R6R7R8R9
R3–R9 · LEAD HELD

GM Jonathan Westerberg never relinquished the lead after R3; final gap +1.5 over the runner-up.

R5 · HEAD-TO-HEAD · WINNER VS 2ND

GM Jonathan Westerberg lost to Lukas Willstedt (White).

WIN STREAKS · 3 top finishers

GM Jonathan Westerberg 4+4 wins (R1–R4, R6–R9)Lukas Willstedt 3 wins (R5–R7)Sebastian Shi 3 wins (R7–R9)

Key matchups · top 4

Head-to-head between the four finishers

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Westerberg, JonathanGM2478SWE+5N+11B+9N+3B2B+6N+8B+4N+7B8.040.043.537.002429-2.8
2Willstedt, Lukas2057SWEF+7B+6N=14B+1N+3B+9N=5B=4B6.539.539.533.252211+59.6
3Shi, Sebastian1905SWE+16BF+4N1N+10B2N+12B+9B+5N6.037.037.022.502059+56.8
4Malmquist, Neo1914SWE=7N+10B3B=8N+12B=11N+6B1B=2N5.041.545.021.501890-12.4
5Molin, Nils1823SWE1B+16N+17B=6B9N+7N+11B=2N3B5.038.039.015.501895+15.4
6Ranby, Hans1900SWE+12N+14B2B=5N+11B1B4N+8N10B4.540.042.516.501898-3.6
7Nylund, Benjamin1605NZL=4B2N15N+17B+13N5B+16N+11B1N4.533.534.511.001825+44.6
8Hagstrom, Jacob 19941803SWE14N+12B11N=4B+15N+16B1N6B+18N4.529.529.58.501832+1.6
9Helin, MikaelCM1932SWE+17B+13N1B11N+5B+10N2B3N12N4.039.540.513.001863-14.8
10Sun Aslund, Bruce1687SWEF4N+16B+15B3N9BF+13N+6N4.025.025.010.001890+72.8
11Bergqvist, Morris1849SWE+18B1N+8B+9B6N=4B5N7NF3.535.535.511.001788-14.4
12Aelius,Gary0SWE6B8N+18N+13B4N=15B3NF+9B3.528.528.57.7517680.0
13Jouandet-Dahlen, Loup1649FRA+15B9B14N12N7B+18NF10B+16B3.021.021.02.501683+1.0
14Brodin, Leo2092SWE+8B6N+13B=2NFFFFF2.518.518.510.751958-11.2
15Varjomaa, Stefan1982SWE13NF+7B10N8B=12NFFF1.519.519.56.251493-95.2
16Bardhan, Sayak Raj1594SWE3N5B10NFF8N7B+18B13N1.028.028.00.00945-74.0
17Krusa, Gustav1605SWE9N+18B5N7NFFFFF1.014.514.50.00987-33.6
18Kozik,Irina0SWE11N17N12BFF13BF16N8B0.018.018.00.008990.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets