Icelandic Team Chess Championship 2025-26 - 1st league Round 1-4
SwissStandard
66 players participated in this 4-round tournament, held from 14 Nov 2025 to 16 Nov 2025 in Reykjavik, Iceland. 19 titled players from 6 federations. Top 10 Elo average was 2259, and top seed was Jonah B Willow (🇬🇧 ENG, IM, 2472).
Jonah B Willow (🇬🇧 ENG, IM, 2472) won with 4.0/4, ahead of Baldur Teodor Petersson (3.5) and James Moreby (3.5). Willow broke clear in the final round.
The biggest upset came in round 4: Kristjan Dagur Jonsson (1892) beat Bragi Halldorsson (2064), a +172-point gap.
Location
🇮🇸Reykjavik, Iceland
Dates
14 Nov 2025 → 16 Nov 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 4 rounds
Titled players · 19
IM×2
FM×6
CM×6
WGM×1
WIM×1
WFM×1
WCM×2
Federations · 6 represented
🇮🇸Iceland×60
🇬🇧England×2
🇸🇪Sweden×1
🇳🇱Netherlands×1
🇳🇴Norway×1
🇩🇰Denmark×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 4 roundsIM Jonah B Willow led from R4; +0.5-point edge over the runner-up.
Co-leaders
16
6
4
1
R4–R4 · LEAD HELD
IM Jonah B Willow held the sole lead from R4 through R4 without losing it.
WIN STREAKS · 2 top finishers
IM Jonah B Willow 4 wins (R1–R4)FM James Moreby 3 wins (R2–R4)
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Willow, Jonah BIM | 2472 | ENG | +56N | +15B | +19N | +24B | 4.0 | 6.5 | 6.5 | 6.50 | 2942 | +5.2 |
| 2 | Petersson, Baldur TeodorCM | 2151 | SWE | +27N | +58B | +36N | =14B | 3.5 | 5.0 | 5.0 | 3.75 | 2285 | +9.8 |
| 3 | Moreby, JamesFM | 2318 | ENG | =32B | +45N | +25B | +43N | 3.5 | 3.0 | 3.5 | 3.00 | 2448 | +9.0 |
| 4 | Thorisson, Benedikt | 2037 | ISL | +35N | +66B | +56B | =25B | 3.5 | 2.5 | 2.5 | 1.75 | 2398 | +32.6 |
| 5 | Thorgeirsson, Jon KristinnFM | 2259 | ISL | +45N | +43B | =51N | +32B | 3.5 | 2.0 | 2.5 | 2.25 | 2398 | +11.0 |
| 6 | Heidarsson, Arnar Milutin | 2072 | ISL | =16B | +25N | +60B | =7B | 3.0 | 7.0 | 7.0 | 4.25 | 2339 | +28.0 |
| 7 | Sigurpalsson, RunarFM | 2240 | ISL | =8B | +44N | +57B | =6N | 3.0 | 6.5 | 6.5 | 3.50 | 2257 | +3.6 |
| 8 | Van den Berg, Bram | 2194 | NED | =7N | +16N | =44B | +65N | 3.0 | 6.0 | 6.0 | 4.25 | 2279 | +10.6 |
| 9 | Karlsson, Bjorn-IvarFM | 2330 | ISL | =15B | =24N | +65B | +56N | 3.0 | 4.5 | 4.5 | 2.25 | 2300 | -1.4 |
| 10 | Bergsson, Stefan | 2156 | ISL | =28N | +48B | +46N | =29B | 3.0 | 3.5 | 4.0 | 2.50 | 2208 | +6.2 |
| 11 | Karlsson, Mikael Johann | 2140 | ISL | +26B | +34N | +61B | −33N | 3.0 | 3.5 | 3.5 | 2.50 | 2178 | +5.2 |
| 12 | Kristinsson, Baldur | 2147 | ISL | +33B | =26N | +47B | =48N | 3.0 | 3.0 | 3.5 | 2.50 | 2226 | +8.6 |
| 13 | Hardarson, Petur Palmi | 2109 | ISL | +44B | +52N | F | +37N | 3.0 | 2.0 | 2.0 | 2.00 | 2794 | +21.8 |
| 14 | Haraldsson, Haraldur | 1951 | ISL | =17N | =30N | +26N | =2N | 2.5 | 7.5 | 9.0 | 5.25 | 2195 | +25.4 |
| 15 | Hansen, Soren BechFM | 2230 | DEN | =9N | −1N | +43B | +53N | 2.5 | 7.5 | 8.0 | 2.50 | 2292 | +7.4 |
| 16 | Ptacnikova, LenkaWGM | 2159 | ISL | =6N | −8B | +49N | +44B | 2.5 | 6.5 | 7.0 | 2.50 | 2190 | +3.4 |
| 17 | Gudmundsson, Kristofer Orri | 1959 | ISL | =14B | +65B | −27N | +38N | 2.5 | 5.0 | 5.0 | 2.25 | 2018 | +12.4 |
| 18 | Bjornsson, Eirikur K. | 1952 | ISL | +59N | =46N | F | +47B | 2.5 | 1.0 | 1.0 | 0.75 | 2166 | +15.0 |
| 19 | Hardarson, Jon TraustiCM | 2069 | ISL | +53B | =32N | −1B | =20B | 2.0 | 7.0 | 7.5 | 2.00 | 2171 | +8.6 |
| 20 | Jonsson, Gauti Pall | 2121 | ISL | =43B | +53N | F | =19N | 2.0 | 3.0 | 3.0 | 1.75 | 2144 | +2.0 |
| 21 | Sigurdsson, Saeberg | 2061 | ISL | +50B | −39N | +62B | F | 2.0 | 1.5 | 1.5 | 0.50 | 2053 | -0.4 |
| 22 | Palsson, Halldor | 1987 | ISL | F | F | +59N | +46B | 2.0 | 0.5 | 0.5 | 0.50 | 2721 | +16.6 |
| 23 | Heidarsson, Mikael Bjarki | 1971 | ISL | F | +64N | +52B | F | 2.0 | 0.5 | 0.5 | 0.50 | 2563 | +19.2 |
| 24 | Halldorsson, HalldorCM | 2100 | ISL | +58N | F | +63N | F | 2.0 | 0.0 | 0.0 | 0.00 | 2236 | +13.8 |
| 25 | Halldorsson, Jon ArniCM | 2084 | ISL | +66N | −6B | −3N | =4N | 1.5 | 10.0 | 10.0 | 1.75 | 1983 | -11.6 |
| 26 | Kristinsson, Jon | 2091 | ISL | −11N | =12B | −14B | +57N | 1.5 | 8.5 | 8.5 | 1.50 | 1925 | -17.6 |
| 27 | Briem, Gudrun FanneyWCM | 1998 | ISL | −2B | =47N | +17B | F | 1.5 | 6.5 | 6.5 | 2.75 | 1982 | -2.4 |
| 28 | Halldorsson, Bragi | 2064 | ISL | =10B | F | +34N | −40B | 1.5 | 5.0 | 5.0 | 2.50 | 2012 | -4.2 |
| 29 | Kolka, David | 2070 | ISL | F | =49B | =31N | =10N | 1.5 | 5.0 | 5.0 | 2.50 | 2058 | -0.8 |
| 30 | Thorsteinsson, ArnarCM | 2199 | ISL | F | =14B | F | +50B | 1.5 | 3.0 | 3.0 | 1.75 | 2163 | -1.6 |
| 31 | Fridjonsson, Julius | 2054 | ISL | −34N | F | =29B | +49B | 1.5 | 3.0 | 3.0 | 1.25 | 2007 | -3.8 |
| 32 | Einarsson, Halldor GretarFM | 2177 | ISL | =3N | =19B | F | −5N | 1.0 | 9.0 | 9.0 | 2.75 | 2090 | -7.0 |
| 33 | Halldorsson, GudmundurCM | 2092 | ISL | −12N | F | F | +11B | 1.0 | 6.0 | 6.0 | 3.00 | 2144 | +3.0 |
| 34 | Karlsson, Thorleifur | 1987 | ISL | +31B | −11B | −28B | F | 1.0 | 6.0 | 6.0 | 1.50 | 1961 | -2.0 |
| 35 | Bjorgvinsson, Andri Freyr | 2144 | ISL | −4B | F | +45B | F | 1.0 | 4.0 | 4.0 | 0.50 | 2077 | -3.6 |
| 36 | Hauksdottir, Hrund | 1820 | ISL | F | +50N | −2B | F | 1.0 | 4.0 | 4.0 | 0.50 | 2070 | +12.0 |
| 37 | Fridgeirsson, Dagur Andri | 2024 | ISL | +65B | F | F | −13B | 1.0 | 3.0 | 3.0 | 0.00 | 1950 | -3.4 |
| 38 | Finnsson, Johann Arnar | 1954 | ISL | +57B | F | F | −17B | 1.0 | 2.5 | 2.5 | 0.00 | 1885 | -3.6 |
| 39 | Vigfusson, Vigfus | 1967 | ISL | F | +21B | F | F | 1.0 | 2.0 | 2.0 | 2.00 | 2861 | +12.6 |
| 40 | Jonsson, Kristjan Dagur | 1892 | ISL | F | F | F | +28N | 1.0 | 1.5 | 1.5 | 1.50 | 2864 | +14.6 |
| 41 | Acevedo Mendez, LissethWIM | 1846 | ISL | +46N | F | F | F | 1.0 | 0.5 | 0.5 | 0.50 | 2614 | +9.2 |
| 42 | Thorsteinsdottir, GudlaugWFM | 2011 | ISL | F | F | F | +59N | 1.0 | 0.0 | 0.0 | 0.00 | 2827 | +10.4 |
| 43 | Oskarsson, Markus Orri | 2072 | ISL | =20N | −5N | −15N | −3B | 0.5 | 9.5 | 11.5 | 1.00 | 1910 | -26.8 |
| 44 | Palsson, Bogi | 2149 | NOR | −13N | −7B | =8N | −16N | 0.5 | 9.0 | 11.5 | 1.50 | 1854 | -54.8 |
| 45 | Einarsson, Arnthor | 2115 | ISL | −5B | −3B | −35N | =52B | 0.5 | 8.0 | 8.5 | 0.25 | 1810 | -27.4 |
| 46 | Kristinsson, Magnus | 1814 | ISL | −41B | =18B | −10B | −22N | 0.5 | 7.5 | 8.5 | 1.25 | 1663 | -13.2 |
| 47 | Finnbogadottir, Tinna Kristin | 1837 | ISL | F | =27B | −12N | −18N | 0.5 | 7.0 | 7.0 | 0.75 | 1759 | -5.4 |
| 48 | Karason, Askell OIM | 2111 | ISL | F | −10N | F | =12B | 0.5 | 6.0 | 6.0 | 1.50 | 1959 | -7.8 |
| 49 | Hauksson, Hordur Aron | 1965 | ISL | F | =29N | −16B | −31N | 0.5 | 5.5 | 6.0 | 0.75 | 1821 | -9.8 |
| 50 | Johannsson, Markus Orri | 1990 | ISL | −21N | −36B | =53N | −30N | 0.5 | 4.5 | 5.0 | 0.25 | 1677 | -58.0 |
| 51 | Arnarson, Thordur | 1882 | ISL | F | F | =5B | F | 0.5 | 4.0 | 4.0 | 1.75 | 2259 | +8.2 |
| 52 | Eiriksson, Theodor | 1807 | ISL | F | −13B | F | =45N | 0.5 | 3.5 | 3.5 | 0.25 | 1791 | -3.2 |
| 53 | Leosson, Haukur Vidis | 1913 | ISL | F | F | =50B | F | 0.5 | 0.5 | 0.5 | 0.25 | 1780 | -22.8 |
| 54 | Jonsson, Bjorn | 1987 | ISL | F | =55B | F | F | 0.5 | 0.5 | 0.5 | 0.25 | 1791 | -5.0 |
| 55 | Arnason, Einar Agust | 1791 | ISL | F | =54N | F | F | 0.5 | 0.5 | 0.5 | 0.25 | 1987 | +5.0 |
| 56 | Briem, Stephan | 2166 | ISL | −1B | F | −4N | −9B | 0.0 | 10.5 | 10.5 | 0.00 | 1480 | -21.8 |
| 57 | Hauksson, Bjorgvin Jonas | 1811 | ISL | −38N | F | −7N | −26B | 0.0 | 5.5 | 5.5 | 0.00 | 1285 | -11.0 |
| 58 | Larusson, Petur Atli | 2026 | ISL | −24B | −2N | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 1326 | -14.6 |
| 59 | Hansson, Gudmundur Freyr | 2027 | ISL | −18B | F | −22B | −42B | 0.0 | 5.5 | 5.5 | 0.00 | 1183 | -33.6 |
| 60 | Leosson, Torfi | 2100 | ISL | F | F | −6N | F | 0.0 | 3.0 | 3.0 | 0.00 | 1272 | -10.8 |
| 61 | Kravchuk, Mykhaylo | 1770 | ISL | F | F | −11N | F | 0.0 | 3.0 | 3.0 | 0.00 | 1340 | -2.0 |
| 62 | Jonsson, Sveinbjorn | 1828 | ISL | F | F | −21N | F | 0.0 | 2.0 | 2.0 | 0.00 | 1261 | -4.2 |
| 63 | Fridthjofsdottir, Sigurl. Regina | 1740 | ISL | F | F | −24B | F | 0.0 | 2.0 | 2.0 | 0.00 | 1300 | -2.0 |
| 64 | Magnusdottir, Veronika Steinunn | 1713 | ISL | F | −23B | F | F | 0.0 | 2.0 | 2.0 | 0.00 | 1168 | -3.8 |
| 65 | Ernisson, Petur Ulfar | 1791 | ISL | F | F | F | F | 0.0 | 0.0 | 0.0 | 0.00 | 1291 | -26.0 |
| 66 | Helgadottir, IdunnWCM | 1852 | ISL | F | F | F | F | 0.0 | 0.0 | 0.0 | 0.00 | 1261 | -18.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Thorisson, BenediktISL+32.63.5 pts · #4
- 2Heidarsson, Arnar MilutinISL+28.03.0 pts · #13
- 3Haraldsson, HaraldurISL+25.42.5 pts · #17
Top rating losers
- 1Johannsson, Markus OrriISL-58.00.5 pts · #55
- 2Palsson, BogiNOR-54.80.5 pts · #52
- 3Hansson, Gudmundur FreyrISL-33.60.0 pts · #65
Biggest upsets
- R4+172 Elo gap
- R2+170 Elo gap
- R3+140 Elo gap