Chessfestival Groningen 2025 Compact A
Open SwissStandard
34 players participated in this 5-round tournament, held from 26 Dec 2025 to 30 Dec 2025 in Groningen, Netherlands. 3 titled players from 2 federations. Top 10 Elo average was 2129, and top seed was Mees Van Osch (🇳🇱 NED, FM, 2326).
Bram Ten Dam (🇳🇱 NED, FM, 2166) won with 4.5/5, ahead of Enrico Vroombout (4.0) and Mees Van Osch (4.0). Ten Dam won solo starting round 4.
The biggest upset came in round 3: Noah Sosef (1820) beat Rudolf Potze (2066), a +246-point gap.
Location
🇳🇱Groningen, Netherlands
Dates
26 Dec 2025 → 30 Dec 2025
Time control
Standard: 90min/40moves+30min/end+30sec increment per move starting from move 1
System
Swiss · 5 rounds
Titled players · 3
FM×3
Federations · 2 represented
🇳🇱Netherlands×33
🇪🇸Spain×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 5 roundsFM Bram Ten Dam led from R4; +0.5-point edge over the runner-up.
Co-leaders
8
4
2
1
1
R4–R5 · LEAD HELD
FM Bram Ten Dam held the sole lead from R4 through R5 without losing it.
WIN STREAKS · 2 top finishers
FM Bram Ten Dam 4 wins (R1–R4)FM Mees Van Osch 3 wins (R3–R5)
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ten Dam, BramFM | 2166 | NED | +34N | +25B | +8N | +4B | =5N | 4.5 | 11.5 | 11.5 | 9.75 | 2462 | +61.2 |
| 2 | Vroombout, Enrico | 2056 | NED | +23B | +28N | −4B | +8N | +9B | 4.0 | 11.0 | 12.0 | 8.50 | 2275 | +27.0 |
| 3 | Van Osch, MeesFM | 2326 | NED | =24B | =18N | +11B | +13N | +10B | 4.0 | 10.5 | 12.0 | 10.25 | 2201 | -9.6 |
| 4 | Boersma, Jan | 2052 | NED | +19N | +9B | +2N | −1N | =14B | 3.5 | 14.0 | 16.0 | 10.25 | 2189 | +18.6 |
| 5 | Baselmans, Sam | 2268 | NED | F | +24N | +26B | +14N | =1B | 3.5 | 10.0 | 10.0 | 7.75 | 2367 | +7.2 |
| 6 | Van t Veld, Menno | 1942 | NED | −8N | +33B | =29N | +25B | +13N | 3.5 | 8.0 | 8.0 | 4.50 | 2125 | +24.4 |
| 7 | Ambrona Navarro, Himar | 1897 | ESP | −28N | =23N | +24B | +29B | +21N | 3.5 | 6.0 | 7.0 | 5.25 | 2147 | +67.2 |
| 8 | Van Kuijk, Vadim | 2094 | NED | +6B | +10N | −1B | −2B | +17N | 3.0 | 15.0 | 17.0 | 8.50 | 2083 | -1.0 |
| 9 | Sijpkens, Michiel | 2062 | NED | +12B | −4N | +28B | +23N | −2N | 3.0 | 12.0 | 13.0 | 5.50 | 2102 | +5.6 |
| 10 | Muller, Kenneth | 1991 | NED | +33N | −8B | +17N | +12B | −3N | 3.0 | 12.0 | 12.0 | 5.00 | 2121 | +16.6 |
| 11 | Omnes, Tiago | 2024 | NED | =13N | =17B | −3N | +20B | +19N | 3.0 | 10.5 | 12.5 | 6.25 | 2033 | +2.0 |
| 12 | Clemens, AdrianFM | 2075 | NED | −9N | +19B | +18B | −10N | +22B | 3.0 | 10.0 | 12.0 | 6.00 | 2020 | -6.8 |
| 13 | Sosef, Noah | 1820 | NED | =11B | +32N | +21N | −3B | −6B | 2.5 | 12.5 | 13.0 | 4.00 | 2044 | +54.4 |
| 14 | Van Putten, Henk | 2076 | NED | F | +31B | +20N | −5B | =4N | 2.5 | 9.5 | 9.5 | 4.25 | 2143 | +6.8 |
| 15 | Van Helvoort, Rob | 2062 | NED | =17N | −20B | +22B | =26N | =18B | 2.5 | 8.0 | 9.5 | 4.75 | 1923 | -18.6 |
| 16 | Termeulen, Albert | 2028 | NED | =27B | −26N | −23B | +33N | +30B | 2.5 | 5.5 | 5.5 | 1.75 | 1903 | -16.6 |
| 17 | Vos de Wael, Alexander | 1896 | NED | =15B | =11N | −10B | +24N | −8B | 2.0 | 11.5 | 13.0 | 4.25 | 1949 | +6.6 |
| 18 | Van de Poel, Taco | 1930 | NED | F | =3B | −12N | +31B | =15N | 2.0 | 10.0 | 10.0 | 3.75 | 2102 | +16.2 |
| 19 | Buurstra, Richard | 1836 | NED | −4B | −12N | +33B | +32N | −11B | 2.0 | 10.0 | 10.0 | 0.50 | 1923 | +10.6 |
| 20 | Meijer, Olaf | 1925 | NED | F | +15N | −14B | −11N | +26B | 2.0 | 9.5 | 9.5 | 4.00 | 2027 | +10.8 |
| 21 | Potze, Rudolf | 2066 | NED | F | +27N | −13B | +30N | −7B | 2.0 | 8.5 | 8.5 | 2.50 | 1872 | -20.0 |
| 22 | Verheij, Dana | 1920 | NED | −25N | +34B | −15N | +28B | −12N | 2.0 | 8.0 | 8.0 | 1.00 | 1973 | +7.0 |
| 23 | Niemeijer, Leon | 1947 | NED | −2N | =7B | +16N | −9B | F | 1.5 | 13.0 | 13.5 | 4.25 | 1924 | -3.0 |
| 24 | Botter, Simon | 1935 | NED | =3N | −5B | −7N | −17B | +33N | 1.5 | 13.0 | 13.0 | 2.00 | 1899 | -16.8 |
| 25 | Bosker, Peter | 2093 | NED | +22B | −1N | =30B | −6N | F | 1.5 | 11.0 | 11.0 | 2.50 | 1893 | -21.8 |
| 26 | Dekker, Jasper | 1945 | NED | F | +16B | −5N | =15B | −20N | 1.5 | 10.5 | 10.5 | 3.75 | 1984 | +2.2 |
| 27 | Kudernac, Theo | 1879 | NED | =16N | −21B | +34N | F | F | 1.5 | 4.5 | 4.5 | 1.25 | 2023 | +22.8 |
| 28 | Wilming, Auke | 2021 | NED | +7B | −2B | −9N | −22N | F | 1.0 | 12.5 | 13.0 | 3.50 | 1791 | -24.0 |
| 29 | Gortemaker, Lucas | 2021 | NED | F | =30N | =6B | −7N | F | 1.0 | 8.0 | 8.0 | 2.25 | 1785 | -19.0 |
| 30 | Luimes, Arent | 1892 | NED | F | =29B | =25N | −21B | −16N | 1.0 | 7.0 | 7.0 | 1.25 | 1859 | -3.2 |
| 31 | Sternau, Almar | 1945 | NED | F | −14N | =32B | −18N | F | 0.5 | 6.5 | 6.5 | 0.25 | 1719 | -16.2 |
| 32 | Wierenga, Jael | 1970 | NED | F | −13B | =31N | −19B | F | 0.5 | 6.0 | 6.0 | 0.25 | 1594 | -28.2 |
| 33 | Ganeshram, Nirupa | 1854 | NED | −10B | −6N | −19N | −16B | −24B | 0.0 | 11.0 | 12.5 | 0.00 | 1146 | -37.8 |
| 34 | Hendriks, Peter | 1974 | NED | −1B | −22N | −27B | F | F | 0.0 | 8.0 | 8.0 | 0.00 | 1189 | -29.2 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Ambrona Navarro, HimarESP+67.23.5 pts · #4
- 2Ten Dam, BramFMNED+61.24.5 pts · #1
- 3Sosef, NoahNED+54.42.5 pts · #14
Top rating losers
- 1Ganeshram, NirupaNED-37.80.0 pts · #34
- 2Hendriks, PeterNED-29.20.0 pts · #33
- 3Wierenga, JaelNED-28.20.5 pts · #32
Biggest upsets
- R3+246 Elo gap
- R5+169 Elo gap
- R4+151 Elo gap