CChessStats

European School Chess Championship 2025 - Open 17&Girls 17

Open SwissStandard

21 players participated in this 9-round tournament, held from 30 May 2025 to 07 Jun 2025 in Mamaia, Romania. 3 titled players from 2 federations. Top 10 Elo average was 2019, and top seed was Christian-Arrydan Tamas (🇷🇴 ROU, FM, 2219).

Matei-Valeriu Mogirzan (🇷🇴 ROU, CM, 2046) won with 6.5/9, ahead of Ozgur Deniz Hasirci (6.5) and Victor-Dominic Onica (6.5). Mogirzan shared the lead from round 2, winning on tie-break.

The biggest upset came in round 7: Viacheslav Voloshyn (1540) beat Eduard-Andrei Constantin (1874), a +334-point gap.

Location
🇷🇴Mamaia, Romania
Dates
30 May 2025 → 07 Jun 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇷🇴FMChristian-Arrydan Tamas2219
Avg top 10
2,019
Participants
21
Titled players · 3
FM×2
CM×1
Federations · 2 represented
🇷🇴Romania×16
🇹🇷Turkiye×5
Top 3

How it unfolded

Top 6 · 9 rounds

Tight race until R9; 3 players tied at 6.5/9, decided on Buchholz.

Co-leaders
9
5
2
1
1
1
1
1
3
2.54.579R1R2R3R4R5R6R7R8R9
Onica6.5Hasirci6.5Mogirzan6.5Yildiz6Akkaya5.5Tamas5.5— ex-leaders:Mogirzanled R4–R8, #7
R9 · TIEBREAK CLUSTER

3 players finish on 6.5/9. Mogirzan takes the title on Buchholz Cut1 (45.0).

R6 · HEAD-TO-HEAD · WINNER VS 2ND

Victor-Dominic Onica drew with Ozgur Deniz Hasirci (Black).

WIN STREAKS · 2 top finishers

Victor-Dominic Onica 3 wins (R2–R4)CM Matei-Valeriu Mogirzan 4 wins (R1–R4)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Victor-Dominic Onica*
½
1
0
2Ozgur Deniz Hasirci
½
*
1
½
3CMMatei-Valeriu Mogirzan
0
0
*
½
4FMSerdar Murat Yildiz
1
½
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Mogirzan, Matei-ValeriuCM2046ROU+8B+21N+9B+7N=4B+5N+6B−2B−3N6.545.045.029.002151+46.0
2Hasirci, Ozgur Deniz2149TUR+11N+18B=6N−5B+9N=3B+10B+1N=4B6.543.546.532.002159+12.0
3Onica, Victor-Dominic1844ROU−4N+16B+20N+12B=6N=2N=5B+11B+1B6.542.043.028.252093+115.2
4Yildiz, Serdar MuratFM2208TUR+3B−7N+15B+10N=1N−6B+9N+5B=2N6.045.048.531.002112-33.2
5Tamas, Christian-ArrydanFM2219ROU+12N−6B+11N+2N+7B−1B=3N−4N+10B5.545.549.528.252050-63.2
6Akkaya, Atakan2010TUR+17B+5N=2B=9N=3B+4N−1N+13B−7N5.545.048.027.252075+34.4
7Torun, Kagan1892TUR+19B+4B+18N−1B−5N−10N=14B+17N+6B5.537.540.522.251984+46.0
8Criveanu, Maria1743ROU−1N−15B+13B+16N−10B=17N+21B+14N=9B5.033.033.014.751804+23.2
9Cotoros, Eduard2013ROU+15N+14B−1N=6B−2B+12N−4B=16N=8N4.540.544.018.001886-49.6
10Karadas, Hena1903TUR−14N+13N+21B−4B+8N+7B−2N=19B−5N4.539.039.016.001865-18.8
11Simescu, Radu-Adrian1814ROU−2B+19N−5B+21N=17B=14N+12B−3N=18N4.535.035.011.751809-9.6
12Marcu, Daria-Ana1860ROU−5B+17N+14B−3N+15B−9B−11NF+19N4.034.034.013.001811-20.4
13Moroita, Vlad1880ROU=16N−10B−8NF=14B+15N+17B−6N+20B4.029.529.511.001718-61.6
14Croitoru, Matei-Andrei1646ROU+10B−9N−12N+18B=13N=11B=7N−8BF3.535.035.014.501830+74.8
15Dumitrache, Elisa-Andreea1721ROU−9B+8N−4N+19B−12N−13BF+20N=16B3.531.031.010.751732-2.4
16Voloshyn, Viacheslav1540ROU=13B−3N−17B−8BF+20N+18N=9B=15N3.530.530.510.001733+67.6
17Kiss, Hanna1701ROU−6N−12B+16N+20B=11N=8B−13N−7BF3.033.033.09.251693-8.0
18Constantin, Eduard-Andrei1874ROU+20B−2N−7B−14N=19NF−16B+21N=11B3.027.527.54.751566-108.4
19Szekely, David-Kristof1540ROU−7N−11BF−15N=18B+21N+20B=10N−12B3.026.026.04.751637+21.2
20Moraru, Stefan-Robert1482ROU−18NF−3B−17N+21B−16B−19N−15B−13N1.026.526.50.00929-65.2
21Butoi, David-Mihai0ROUF−1B−10N−11B−20N−19B−8N−18BF0.031.031.00.00953-60.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets