Thunder Chess KM 2025 R45678
19 players participated in this 8-round tournament, held from 08 May 2025 to 05 Jun 2025 in Goteborg, Sweden. 3 federations represented. Top 10 Elo average was 1908, and top seed was Brjann Sigurgeirson (🇸🇪 SWE, 2133).
Brjann Sigurgeirson (🇸🇪 SWE, 2133) won with 4.5/8, ahead of Jonas Kallen (4.5) and David 2010 Green (3.0). Sigurgeirson shared the lead from round 6, winning on tie-break.
The biggest upset came in round 5: Vuk Cigoja (1770) beat Lennart Jacobsson (1890), a +120-point gap.
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How it unfolded
Top 6 · 8 roundsTight race until R8; 2 players tied at 4.5/8, decided on Buchholz. Title race narrowed from 7 co-leaders at R4 to 2 at the finish.
2 players finish on 4.5/8. Sigurgeirson takes the title on Buchholz Cut1 (12.5).
Brjann Sigurgeirson drew with Jonas Kallen (Black).
Brjann Sigurgeirson 3 wins (R6–R8)Jonas Kallen 3 wins (R6–R8)David 2010 Green 3 wins (R5–R7)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Brjann Sigurgeirson | * | ½ | — | — |
| 2Jonas Kallen | ½ | * | 1 | — |
| 3David 2010 Green | — | 0 | * | 0 |
| 4Lennart Jacobsson | — | — | 1 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sigurgeirson, Brjann | 2133 | SWE | F | F | F | +14B | =2N | +5B | +11N | +15B | 4.5 | 12.5 | 12.5 | 10.25 | 2302 | +12.6 |
| 2 | Kallen, Jonas | 2059 | SWE | F | F | F | +10N | =1B | +14N | +17N | +3B | 4.5 | 12.0 | 12.0 | 9.75 | 2239 | +13.6 |
| 3 | Green, David 2010 | 1865 | SWE | F | F | F | −4B | +8N | +7N | +13B | −2N | 3.0 | 14.5 | 14.5 | 7.00 | 1923 | +16.0 |
| 4 | Jacobsson, Lennart | 1890 | SWE | F | F | F | +3N | −7B | +6N | =14B | =9N | 3.0 | 12.0 | 12.0 | 7.75 | 1845 | -3.4 |
| 5 | Azikri, Gur | 1982 | ISR | F | F | F | =9B | +12N | −1N | =15B | +11B | 3.0 | 12.0 | 12.0 | 5.75 | 2033 | +2.6 |
| 6 | FIDE 1797760 | 0 | — | F | F | F | +19B | +?N | −4B | +12B | −14N | 3.0 | 6.5 | 6.5 | 2.00 | 1094 | 0.0 |
| 7 | Cigoja, Vuk | 1770 | BIH | F | F | F | F | +4N | −3B | =16N | +8B | 2.5 | 10.0 | 10.0 | 6.25 | 1893 | +13.4 |
| 8 | Billing, Sverker | 1859 | SWE | F | F | F | =18N | −3B | +12B | +19N | −7N | 2.5 | 8.0 | 8.0 | 2.25 | 1018 | -44.4 |
| 9 | Papadopoulos, Georgios | 0 | SWE | F | F | F | =5N | F | +16N | −10N | =4B | 2.0 | 10.5 | 10.5 | 4.50 | 1837 | 0.0 |
| 10 | Fallman, Markus | 0 | SWE | F | F | F | −2B | −13N | F | +9B | +17B | 2.0 | 10.0 | 10.0 | 3.00 | 1071 | 0.0 |
| 11 | Christoforidis, Nicolas | 1926 | SWE | F | F | F | F | +14N | +17B | −1B | −5N | 2.0 | 10.0 | 10.0 | 2.50 | 1880 | -4.2 |
| 12 | Danielsson, Benedikt | 0 | SWE | F | F | F | +?B | −5B | −8N | −6N | +16B | 2.0 | 10.0 | 10.0 | 1.50 | 1683 | 0.0 |
| 13 | Ramle, Peter | 1694 | SWE | F | F | F | +16N | +10B | −15N | −3N | F | 2.0 | 8.0 | 8.0 | 3.50 | 1724 | +3.2 |
| 14 | Mohammed, Safian Haj | 1901 | SWE | F | F | F | −1N | −11B | −2B | =4N | +6B | 1.5 | 17.0 | 17.0 | 4.50 | 1678 | -19.8 |
| 15 | Amaechi, James | 0 | SWE | F | F | F | −17N | F | +13B | =5N | −1N | 1.5 | 11.0 | 11.0 | 3.50 | 1936 | 0.0 |
| 16 | Shakal, George | 1582 | SWE | F | F | F | −13B | +19N | −9B | =7B | −12N | 1.5 | 8.5 | 8.5 | 1.25 | 1539 | -4.4 |
| 17 | Thornfalt, Tomas | 0 | SWE | F | F | F | +15B | F | −11N | −2B | −10N | 1.0 | 12.0 | 12.0 | 1.50 | 1190 | -25.6 |
| 18 | Surakka, Elvis | 0 | SWE | F | F | F | =8B | F | F | — | — | 0.5 | 6.0 | 6.0 | 1.25 | 1859 | 0.0 |
| 19 | Dmytrenko, Roman | 0 | SWE | F | F | F | −6N | −16B | −?N | −8B | F | 0.0 | 7.0 | 7.0 | 0.00 | 921 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Green, David 2010SWE+16.03.0 pts · #2
- 2Kallen, JonasSWE+13.64.5 pts · #4
- 3Cigoja, VukBIH+13.42.5 pts · #3
- 1Billing, SverkerSWE-44.42.5 pts · #15
- 2Thornfalt, TomasSWE-25.61.0 pts · #17
- 3Mohammed, Safian HajSWE-19.81.5 pts · #12
- R5+120 Elo gap