CChessStats

ACC Sirius Open Oct 2025

Open SwissStandard

18 players participated in this 5-round tournament, held from 13 Oct 2025 to 09 Nov 2025 in Athens, Greece. 2 federations represented. Top 10 Elo average was 1778, and top seed was Konstantinos Kesoglou (πŸ‡¬πŸ‡· GRE, 1905).

Konstantinos Kesoglou (πŸ‡¬πŸ‡· GRE, 1905) won with 4.5/5, ahead of Efraim Galanopoulos (4.0) and Omar El Champasi (4.0). Kesoglou shared the lead from round 4 and broke clear in the final round.

Location
πŸ‡¬πŸ‡·Athens, Greece
Dates
13 Oct 2025 β†’ 09 Nov 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss Β· 5 rounds
Top seed
πŸ‡¬πŸ‡·Konstantinos Kesoglou1905
Avg top 10
1,778
Participants
18
Federations Β· 2 represented
πŸ‡¬πŸ‡·GreeceΓ—17
πŸ‡΅πŸ‡±PolandΓ—1
Top 3

How it unfolded

Top 6 Β· 5 rounds

Konstantinos Kesoglou led from R5; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders
9
3
1
2
1
1.52.545R1R2R3R4R5Kesoglou takes lead
Kesoglou4.5Galanopoulos4El Champasi4Hatzistamatiou3.5Mastoras3.5Vazelakis2.5
R5 Β· LEADER CHANGE09 Nov

Konstantinos Kesoglou takes the sole lead (4.5/5).

R4 Β· HEAD-TO-HEAD Β· WINNER VS 2ND

Konstantinos Kesoglou beat Efraim Galanopoulos (White).

WIN STREAKS Β· 3 top finishers

Konstantinos Kesoglou 3 wins (R3–R5)Efraim Galanopoulos 3 wins (R1–R3)Omar El Champasi 4 wins (R2–R5)

Key matchups Β· top 4

Head-to-head between the four finishers
Player1234
1Konstantinos Kesoglou*
1
β€”β€”
2Efraim Galanopoulos
0
*β€”
1
3Omar El Champasiβ€”β€”*β€”
4Nikolaos Hatzistamatiouβ€”
0
β€”*

Grille amΓ©ricaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΞ”
1Kesoglou, Konstantinos1905GRE+11B=5N+16B+2B+7N4.511.512.510.752162+25.8
2Galanopoulos, Efraim1867GRE+9B+6N+8Bβˆ’1N+4B4.012.514.09.501929+7.8
3El Champasi, Omar0GREβˆ’6B+9N+12B+15N+8N4.07.58.56.0016420.0
4Hatzistamatiou, Nikolaos1850GRE+15N+10B=7N+5Bβˆ’2N3.511.512.57.251894+7.4
5Mastoras, Ilias I.1803GRE+13B=1B+10Nβˆ’4N+15B3.511.012.06.251819+5.4
6Kapagiannidis, Konstantinos1672GRE+3Nβˆ’2B+9Nβˆ’7B=10B2.512.013.56.251648-4.0
7Vazelakis, Dimitrios1895GRE+17NF=4B+6Nβˆ’1B2.511.512.55.251852-3.6
8Wiraszka, Michal0POL+12B+11Nβˆ’2NFβˆ’3B2.011.012.03.0017630.0
9Kiloukiotis, Dimitrios1516GREβˆ’2Nβˆ’3Bβˆ’6B+18N=13B1.512.012.51.251527-2.4
10Kratidis, Anastasios1660GRE+14Bβˆ’4Nβˆ’5BF=6N1.511.012.02.751502-10.8
11Metaxas, Konstantinos1647GREβˆ’1Nβˆ’8B+14N=12NF1.59.510.52.251618-3.2
12Pavlis, Antonios1716GREβˆ’8N+18Bβˆ’3N=11BF1.58.59.01.251759+2.2
13Papadopoulos, Emanouil1431GREβˆ’5Nβˆ’17B=18N=14B=9N1.57.58.01.7514090.0
14Gkekas, Alexandros0GREβˆ’10NFβˆ’11B=13N+18B1.55.56.01.2514690.0
15Rafeletos, Apostolis1501GREβˆ’4BF+17Nβˆ’3Bβˆ’5N1.012.513.51.001627+15.2
16Kazakos, Panteleimon1766GRE+18BFβˆ’1NFF1.010.010.50.501695-3.0
17Kountouris, Konstantinos1601GREβˆ’7B+13Nβˆ’15BFF1.07.58.51.501485-10.2
18Eftaxias, Konstantinos Dion1485GREβˆ’16Nβˆ’12N=13Bβˆ’9Bβˆ’14N0.56.07.00.751286-18.0

Key insights

Biggest movers and upsets β€” the story behind the numbers.

Top rating gainers
Top rating losers
ACC Sirius Open Oct 2025 β€” Athens, Greece | Chess Tournament Results | ChessStats