CChessStats

ACC Sirius open U1900 Nov 2025

Open SwissStandard

12 players participated in this 5-round tournament, held from 16 Nov 2025 to 14 Dec 2025 in Petroupoli, Greece. Top 10 Elo average was 1697, and top seed was Konstantinos Kesoglou (🇬🇷 GRE, 1925).

Konstantinos Kesoglou (🇬🇷 GRE, 1925) won with 4.5/5, ahead of Dimitrios Vazelakis (4.0) and Omar El Champasi (3.5). Kesoglou won solo starting round 2.

The biggest upset came in round 5: Anastasios Kratidis (1660) beat Ilias I. Mastoras (1816), a +156-point gap.

Location
🇬🇷Petroupoli, Greece
Dates
16 Nov 2025 → 14 Dec 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Top seed
🇬🇷Konstantinos Kesoglou1925
Avg top 10
1,697
Participants
12
Federations · 1 represented
🇬🇷Greece×12
Top 3

How it unfolded

Top 6 · 5 rounds

Konstantinos Kesoglou led from R2; +0.5-point edge over the runner-up.

Co-leaders
3
1
1
1
1
1.52.545R1R2R3R4R5
Kesoglou4.5Vazelakis4El Champasi3.5Kapagiannidis3Pavlis2.5Bellos2
R2–R5 · LEAD HELD

Konstantinos Kesoglou held the sole lead from R2 through R5 without losing it.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Konstantinos Kesoglou drew with Dimitrios Vazelakis (Black).

R1–R3 · WIN STREAK

Konstantinos Kesoglou won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Konstantinos Kesoglou*
½
—
1
2Dimitrios Vazelakis
½
*
1
1
3Omar El Champasi—
0
*—
4Konstantinos Kapagiannidis
0
0
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Kesoglou, Konstantinos1925GRE+4B+8N+9B=2N+5B4.511.012.510.502124+18.8
2Vazelakis, Dimitrios1895GRE=9N+3B+5N=1B+4N4.013.515.012.001940+3.2
3El Champasi, Omar0GRE+11B−2N=8B+10N+6B3.59.010.55.751815+5.6
4Kapagiannidis, Konstantinos1672GRE−1N+12B+6N+8B−2B3.012.013.55.001788+16.6
5Pavlis, Antonios1716GRE=7B+10N−2B+9N−1N2.512.013.54.001779+8.0
6Rafeletos, Apostolis1501GRE−8N+11B−4B+12N−3N2.09.511.03.001508-1.6
7Bellos, Vasilios1725GRE=5NF−10B+11N=12B2.07.08.53.501470-19.4
8Mastoras, Ilias I.1816GRE+6B−1B=3N−4N−9B1.513.014.53.751500-32.0
9Kratidis, Anastasios1660GRE=2BF−1N−5B+8N1.513.014.53.501756+6.2
10Metaxas, Konstantinos1634GRE=12N−5B+7N−3B−11B1.59.511.02.751621-2.8
11Georgopoulos, Georgios D0GRE−3N−6N=12B−7B+10N1.59.010.52.2514870.0
12Kapnaki, Charikleia1425GRE=10B−4N=11N−6B=7N1.58.510.02.501440+0.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets