CChessStats

Porin turnaus Group B

Open SwissStandard

16 players participated in this 4-round tournament, held from 18 Oct 2025 to 19 Oct 2025 in Pori, Finland. Top 10 Elo average was 1703, and top seed was Anssi Halmesvirta (🇫🇮 FIN, 1846).

Jaakko Kauko (🇫🇮 FIN, 0) won with 3.5/4, ahead of Paul Marjanen (3.0) and Mikko Seilonen (3.0). Kauko broke clear in the final round.

The biggest upset came in round 4: Konstantinos Gatzios (1694) beat Anssi Halmesvirta (1846), a +152-point gap.

Location
🇫🇮Pori, Finland
Dates
18 Oct 2025 → 19 Oct 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 4 rounds
Top seed
🇫🇮Anssi Halmesvirta1846
Avg top 10
1,703
Participants
16
Federations · 1 represented
🇫🇮Finland×16
Top 3

How it unfolded

Top 6 · 4 rounds

Jaakko Kauko led from R4; +0.5-point edge over the runner-up.

Co-leaders
8
2
4
1
1234R1R2R3R4
R4–R4 · LEAD HELD

Jaakko Kauko held the sole lead from R4 through R4 without losing it.

R2–R4 · WIN STREAK

Aaron Ahtola won 3 in a row (R2–R4).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Jaakko Kauko*
½
2Aaron Ahtola*
3Mikko Seilonen*
½
4Paul Marjanen
½
½
*

Grille américaine

#PlayerEloFedR1R2R3R4PtsBu C1BuSBPerfΔ
1Kauko, Jaakko0FIN+8B+10N=2B+6N3.57.59.58.0017440.0
2Marjanen, Paul0FIN+13N+9B=1N=3B3.08.59.56.2517280.0
3Seilonen, Mikko1796FIN+7N=11B+5N=2N3.08.09.57.251945+20.8
4Ahtola, Aaron1622FIN5N+16B+9N+8B3.06.56.54.001856+48.8
5Eerikainen, Risto1770FIN+4B=6N3B+11N2.58.510.05.751803+3.4
6Kaitila, Aleksi1711FIN+16N=5B+11N1B2.57.57.52.751969+18.8
7Lehtonen, Jari1543FIN3B=14B+13N+12N2.55.56.53.001754+31.2
8Sjoskog, Tommy1650FIN1N+15B+10B4N2.08.59.53.001761+9.2
9Jarvinen, Joel1618FIN+12B2N4B+15N2.07.58.52.501736+18.4
10Gatzios, Konstantinos1694FIN+15N1B8N+14B2.06.57.52.001820+9.8
11Jaakkola, Vesa1704FIN+14N=3N6B5B1.58.09.02.501694-1.6
12Jarvinen, Miika1620FIN9N+13B=14N7B1.55.56.51.501396-32.8
13Zhu, Yunqing0FIN2B12N7B+16N1.07.07.00.0014670.0
14Halmesvirta, Anssi1846FIN11B=7N=12B10N1.06.07.52.001447-40.8
15Vuorinen, Juha1591FIN10B8N+16N9B1.06.06.00.001451-14.2
16Palmu, Petri1614FIN6B4N15B13B0.06.57.50.00841-55.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets