CChessStats

3rd Open AO Leonteiou E. Fonsos 2025

Open SwissStandard

23 players participated in this 7-round tournament, held from 20 Sept 2025 to 01 Nov 2025 in Athens, Greece. 2 federations represented. Top 10 Elo average was 1683, and top seed was Fotis Kastis (🇬🇷 GRE, 1937).

Nikolaos Kontos (🇬🇷 GRE, 1790) won with 5.5/7, ahead of Nikolaos Koliousis (4.5) and Marios Nikolaos Katsaros (4.0). Kontos took the lead from round 6.

The biggest upset came in round 4: Marios Nikolaos Katsaros (1571) beat Alexandros Chatzinikolaou (1754), a +183-point gap.

Location
🇬🇷Athens, Greece
Dates
20 Sept 2025 → 01 Nov 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 7 rounds
Top seed
🇬🇷Fotis Kastis1937
Avg top 10
1,683
Participants
23
Federations · 2 represented
🇬🇷Greece×20
🇮🇱Israel×1
Top 3

How it unfolded

Top 6 · 7 rounds

Nikolaos Kontos led from R6; +1.0-point edge over the runner-up.

Co-leaders
8
3
1
1
1
1
1
23.55.57R1R2R3R4R5R6R7Kontos takes lead
Kontos5.5Koliousis4.5Katsaros4Chatzinikolaou4Panagoiliopoulos4Kouvaros3.5
R6 · LEADER CHANGE25 Oct

Nikolaos Kontos takes the sole lead (4.5/6).

R6 · HEAD-TO-HEAD · WINNER VS 2ND

Nikolaos Kontos beat Nikolaos Koliousis (White).

WIN STREAKS · 3 top finishers

Nikolaos Kontos 4 wins (R4–R7)Nikolaos Koliousis 4 wins (R1–R4)Marios Nikolaos Katsaros 3 wins (R2–R4)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Nikolaos Kontos*
1
1
—
2Nikolaos Koliousis
0
*—
1
3Marios Nikolaos Katsaros
0
—*
1
4Alexandros Chatzinikolaou—
0
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Kontos, Nikolaos1790GREF+9B=13N+4B+3N+2B+6N5.522.522.521.001976+17.8
2Koliousis, Nikolaos1661GRE+12N+14B+5N+15BF−1N=13B4.522.025.014.501800+21.4
3Katsaros, Marios Nikolaos1571GRE−7N+20B+6N+5B−1B=4N=15N4.023.524.512.001640+27.2
4Panagoiliopoulos, Marios1523GRE+11B−5B+22N−1N+18B=3B=9N4.022.022.08.751542-1.2
5Chatzinikolaou, Alexandros1754GRE+18B+4N−2B−3N=12B+17N=7B4.021.023.011.251591-27.0
6Tsagkas, Odysseas1624GRE+16B=7N−3B+11N+19BF−1B3.522.524.09.251481-32.4
7Kouvaros, Vasileios Zeiron1408GRE+3B=6B−15N=12N+14BF=5N3.520.520.512.251633+65.2
8Zlotogorski, Itay1775ISR=15N+23B+10N+13BFFF3.517.517.58.001979+16.8
9Androulakis, Radamanthys Pavlos1499GREF−1N−11B+17N+20B+19N=4B3.517.017.06.501694+45.2
10Brazios, Konstantinos1516GRE+21NF−8B+14BF=12N+11B3.515.515.57.501584+10.0
11Tchepkhodze, Giorgi0GRE−4N=12B+9N−6B=16N+21B−10N3.020.520.56.5013980.0
12Damalas, Ioannis1494GRE−2B=11N+20N=7B=5N=10BF3.019.519.58.001564+15.6
13Vasilopoulos, Georgios Th1587GRE+20B+19N=1B−8NFF=2N3.019.519.57.501673+17.6
14Smialetski, Petros1476GRE+17B−2N=19B−10N−7N+20B=16N3.018.019.05.251470-4.8
15Di Giorgio, Victor1513GRE=8B+17N+7B−2NFF=3B3.017.517.59.251679+39.6
16Tzannis, Panayotis1486GRE−6N+21BF−19N=11B+18N=14B3.013.013.05.001530+7.2
17Karadimas Christos Angelos1607GRE−14N−15B+21N−9B+22N−5BF2.014.514.50.00759-90.0
18Chatzinikolaou, Nina Loukia1509GRE−5NFF+22B−4N−16B+19B2.012.512.51.50792-44.4
19Syngounis, Filippos0GREF−13B=14N+16B−6N−9B−18N1.518.018.04.5013290.0
20Di Giorgio, Nikolaos1469GRE−13N−3N−12B+21B−9N−14NF1.018.518.50.00721-84.4
21FIDE 5410168900—−10B−16N−17B−20NF−11NF0.012.512.50.007180.0
22FIDE 5410169040—FF−4B−18N−17BFF0.08.08.00.007430.0
23Kastis, Fotis1937GREF−8NFFFFF0.03.53.50.00975-14.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets