CChessStats

3rd International Open Katerini chess 2026 - B

Open SwissStandard

126 players participated in this 7-round tournament, held from 20 Mar 2026 to 23 Mar 2026 in Katerini, Greece. 5 federations represented. Top 10 Elo average was 1756, and top seed was Iakov Bahar-Mosse (🇬🇷 GRE, 1828).

Panagiotis Atmatsidis (🇬🇷 GRE, 1800) won with 6.5/7, ahead of Nikoleta Pasoglou (6.0) and Panagiotis Arg Sidiropoulos (6.0). Atmatsidis won solo starting round 5.

The biggest upset came in round 1: Athanasios Koutsionas (1495) beat Marios Siskos (1763), a +268-point gap.

Location
🇬🇷Katerini, Greece
Dates
20 Mar 2026 → 23 Mar 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 7 rounds
Top seed
🇬🇷Iakov Bahar-Mosse1828
Avg top 10
1,756
Participants
126
Federations · 5 represented
🇬🇷Greece×92
🇲🇰North Macedonia×8
🇹🇷Turkiye×5
🇧🇬Bulgaria×3
🇩🇪Germany×1
Top 3

How it unfolded

Top 6 · 7 rounds

Panagiotis Atmatsidis led from R5; +0.5-point edge over the runner-up. Title race converged from 3 co-leaders at R4 to 1 by R5.

Co-leaders
51
22
10
3
1
1
1
23.55.57R1R2R3R4R5R6R7
R5–R7 · LEAD HELD

Panagiotis Atmatsidis held the sole lead from R5 through R7 without losing it.

WIN STREAKS · 3 top finishers

Panagiotis Atmatsidis 6 wins (R1–R6)Theodoros Matthaiou 6 wins (R2–R7)Panagiotis Arg Sidiropoulos 4 wins (R4–R7)

R4 · LATE SURGE

Theodoros Matthaiou was #12 at R4, climbed to #2 over the final stretch.

Key matchups · top 4

Head-to-head between the four finishers

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Atmatsidis, Panagiotis1800GRE+67N+73B+3N+84B+9N+18B=2N6.527.530.527.502025+26.0
2Pasoglou, Nikoleta1653GRE+126N+70B+10N=8B+49N+9B=1B6.028.028.022.252004+58.2
3Sidiropoulos, Panagiotis Arg1634GRE+63B+51N1B+62N+14N+49B+8N6.026.529.523.001957+107.2
4Matthaiou, Theodoros1688GRE18N+86B+36N+66B+33N+20B+10N6.025.027.523.001893+55.0
5Lamprinos, Athanasios Angelos1696GRE+110N+106B31N+24B+37N+11B+12N6.024.526.022.001881+27.4
6Talaverou, Vasiliki Viktoria1731GRE50N+15B+67N+61B+30N=13B+18N5.525.028.022.001734+2.4
7Kalfopoulos, Naoum1614GRE+17N18B+110N+53B=60N+50B+48N5.523.525.019.001770+25.4
8Antoniou Tragoudas, Ioannis1778GRE+68B+40N+23B=2N+11B=12N3B5.030.533.522.001765-1.2
9Tsintsar, Zoran1763GER+93N+61B+30N+33B1B2N+31N5.027.530.017.501763+1.0
10Bahar-Mosse, Iakov1828GRE+97B+56N2B+65N+31N+19B4B5.027.029.517.501769-7.8
11Nikolaki, Dimitria1589GRE+104N+71B+19N+20B8N5N+38B5.027.029.018.001781+26.2
12Patsiotis, Konstantinos1666GRE+90N+66B+25N=31B+52N=8B5B5.026.028.518.001759+37.2
13Giamouzis, Georgios1631GRE=41B+39NF+57N+21B=6N+23B5.026.026.021.251845+31.2
14Siskos, Marios1763GRE27B+109N+68B+56N3B+45N+33B5.025.027.016.501681-22.8
15Sidiropoulos, Emmanouil0GRE=42B6N+63B+81N+54B=21N+32B5.024.527.517.7516620.0
16Mavidis, Christos1564GRE+87B=22N34B+94N+64B=32N+60B5.021.023.515.251663+22.4
17Zavrakidis, Charalampos1414GRE7B+125N24B+102N+62B+65N+69N5.021.021.511.501660+37.6
18Atmaca, Osman Gurbet1455TUR+4B+7N=21B+34N+32B1N6B4.532.036.021.751794+121.2
19Paterakis, Panagiotis Emm1679GRE+55B+45N11B+72N+28B10N=27B4.526.529.517.251679+3.2
20Kougkoulis, Christos Orfeas1689GRE+58B+81N+28B11N+51B4N=40B4.526.529.516.501671-4.0
21Atanasovski, David1752MKD=36N+118B=18N+25B13N=15B+52N4.526.527.515.751617-29.6
22Giakoustidis, Spiros-Avgerinos1700GRE+26N=16B52N+85B=35N+61B=25N4.524.527.517.251641-9.8
23Papakyriakou, Petros1636GRE+92N+53B8N=35B+80N+52B13N4.524.026.514.501665+13.2
24Burns, Elisaveta1565MKD+112N60B+17N5N=55B+63B+49N4.524.025.514.751646+26.0
25Zachariadis, Konstantinos G1588GRE+88B+94N12B21N+105B+44N=22B4.523.025.013.251556-3.6
26Theofylaktou, Kyriaki1486GRE22B+88N=89B+59N=34B=28N+54B4.522.525.015.001683+64.0
27Koutsionas, Athanasios1495GRE+14N30B69N+101B+99N+37B=19N4.522.524.515.251709+71.6
28Adamaki, Angeliki1597GRE+91N+100B20N+77B19N=26B+53N4.522.524.513.251505-21.2
29Nikolaidis, Ioannis St1647GRE+57B62N+105B51N+68B=46N+55B4.520.522.514.001589+4.0
30Aidonidis, Stratis Spyridon1619GRE+78B+27N9B+44N6B=51N=41B4.026.529.515.251560-18.4
31Gallos, Vasileios1597GRE+103B+119N+5B=12N10B=60N9B4.026.027.013.001655+14.8
32Pantelidis, Kosmas1632GRE+82N+35B=49N+50B18N=16B15N4.025.528.514.751654+7.6
33Anemogianni, Savvina1597GRE+86N+98B+60N9N4B+35B14N4.025.527.511.501649+16.0
34Chalaris, Iason1626GRE+111N=50B+16N18B=26N=53B=46N4.025.026.514.251545-15.6
35Triantafyllaki, Sofia1513GRE+77B32N+102B=23N=22B33N+64B4.023.025.012.501448-11.6
36Gkadakis, Athanasios1494GRE=21B=89N4B+103N=47B=64N+65B4.023.025.012.001649+40.8
37Krastinsh Daniels1599BUL+96B=117N=64B+43N5B27N+68B4.023.024.511.751433-26.4
38Tamiolakis, Grigorios1706GRE+75B=52N42B=64N+67B+72N11N4.021.524.512.251589-34.8
39Diamantis, Theodoros0GRE=54N13B+118N+73B40N=80B+72B4.021.522.510.251568+47.2
40Blazhevski, Slaven1576MKD+113N8BF+58N+39B=69B=20N4.021.521.512.751671+24.8
41Burns, Kayla1430MKD=13N=79B+106N+99B=69N48B=30N4.021.023.011.501657+74.8
42Basinas, Georgios1518GRE=15N+120B+38N49B50N=98B+71N4.021.022.011.501518-0.2
43Kuscu, Aras Leo0TUR=79N+54B=99N37B53N+66B+62B4.020.022.012.0015770.0
44Tzima, Aikaterini0GRE99N+93B+70N30B+66N25B+61N4.020.022.011.5015680.0
45Ntougkos, Dimitrios1545GRE+74N19B+100N60B+92N14B+98N4.020.022.09.501449-19.2
46Petasakis, Emmanouil1530GRE+121N84B+74N69B+111N=29B=34B4.019.020.09.751520-3.2
47Athanasopoulos, Nikolaos NA1608GRE+109BF50N=76B=36N+75N+51B4.019.019.012.001567-9.6
48Penintas, Vasileios1658GREF+87N117B+75N+98B+41N7B4.018.518.511.501645-0.8
49Papandreou, Nikolaos1734GRE+76B+65N=32B+42N2B3N24B3.527.530.512.001583-27.8
50Feidaros, Ioannis1491GRE+6B=34N+47B32N+42B7NF3.527.027.015.501680+62.4
51Cicek, Baris1510TUR+114N3B+71N+29B20N=30B47N3.526.027.511.001476-9.2
52Orten, Tomris Hilal1568TUR+95N=38B+22B+117N12B23N21B3.525.026.510.501541-7.2
53Tafaki, Despoina Theocharia1519GRE+125B23N+119B7N+43B=34N28B3.523.524.07.501299-37.2
54Pachatiroglou, Apollonas1584GRE=39B43N+120N+90B15N+76B26N3.523.024.08.501561-5.6
55Tzima, Anthia1454GRE19N+123B61N+83B=24N+70B29N3.522.523.59.251433-6.0
56Borisov, Filippos1588GRE+101N10B+92N14B=76N+58B85N3.522.024.09.501524-24.0
57Xynidis, Maximos1447GRE29N+121B+79N13B61N=74B+91N3.521.022.08.001390-10.0
58Belovska, Sofija1456MKD20N+112B=73N40B+88N56N+114B3.519.020.57.001286-26.4
59Chrysidis, Ioannis1606GRE100N+91B=90N26B63N+86B+111N3.517.018.57.751458-39.6
60Mekolli, Iraklis1697GREF+24N33B+45N=7B=31B16N3.027.027.013.251581-35.2
61Baras, Konstantinos1565GRE+107B9N+55B6N+57B22N44B3.026.028.09.001545-6.4
62Zaires Karanasios, Konstantinos1519GRE+124N+29B84N3B17N+82B43N3.025.526.08.001493-3.6
63Bikiaropoulos, Vasileios Nektarios1436GRE3N=124B15N+71B+59B24N=89B3.024.525.08.001523+16.4
64Theodorou, Lazaros0GRE+80N=99B=37N=38B16N=36B35N3.024.026.010.0015150.0
65Asaridou, Antigoni1573GRE+83N49B+82N10B+110N17B36N3.023.525.07.501452-41.2
66Chrysostomidis, Alkiviadis1537GRE+116B12N+78B4N44B43N+122B3.023.524.55.501465-5.8
67Kechagioglou, Athanasios1501GRE1B+103N6B+96N38N+122B77N3.023.524.55.50946-22.8
68Bougas, Theodoros1499GRE8N+113B14N+122B29N+101B37N3.022.023.04.50881-21.4
69Kasmeridis, Orfeas1670GREFF+27B+46N=41B=40N17B3.021.521.512.501588-18.8
70Serapli, Aikaterini1527GRE+102B2N44B+100N=78B55N=88B3.021.023.06.751236-42.0
71Orten, Asya Hilal0TUR+72B11N51B63N+103B+108N42B3.020.522.57.0012780.0
72Androulakis, Radamanthys Pavlos1544GRE71N+104B+122N19B+82N38B39N3.020.521.56.001365-36.4
73Burns, Joshua Benjamin1568MKDF1N=58B39N=87B+107N+105B3.020.520.57.001447-30.0
74Michailidis, Vasileios0GRE45B+108N46B78N+96B=57N=75B3.020.022.07.7512440.0
75Moutzouris, Ioannis1490GRE38N=95B+124N48B+91N47B=74N3.020.020.55.75855-33.6
76Giamouzi, Alexandra1493GRE49N+83BF=47N=56B54N+87B3.020.020.09.251434-13.6
77Stamenkovski, Kalin0MKD35NF+97B28N=89B=81N+67B3.019.519.58.2515510.0
78Zavrakidis, Lazaros1419GRE30N+114B66N+74B=70N85B=79N3.019.020.57.501306-26.0
79Tsonoulis, Athanasios 415201548GRE=43B=41N57B98N+119B=87N=78B3.019.020.07.751315-19.4
80Margariti, Stamatia1503GRE64B+96N=94B+89N23B=39NF3.019.019.08.251563+10.0
81Loshkov, Konstantin1563MKD+123N20B=98N15B+90N=77BF3.018.018.06.0015700.0
82Malamousi, Georgia1434GRE32B+116N65B+115N72B62N+101B3.016.518.05.00766-50.8
83Kakoulidis, Eleftherios0GRE65B76N+108B55N+100B105N+104N3.015.517.56.007000.0
84Gazetis, Evripidis1662GRE+108B+46N+62B1NFFF3.015.515.59.001741+13.2
85Bakratsas, Emmanouil1510GREFFF22N+94B+78N+56B3.013.513.59.001694+30.8
86Koutroupa, Maria0GRE33B4N+107B97N=95B59N+115B2.520.522.04.75799-56.4
87Koukiotis, Evangelos0GRE16N48B=91N+118B=73N=79B76N2.520.521.55.2513300.0
88Piperidou, Angeliki0GRE25N26BF+93N58B+90B=70N2.520.520.56.5013490.0
89Stylianou, Dimitrios Iason1637GREF=36B=26N80B=77N=92B=63N2.520.020.08.501399-63.2
90Kontaki, Maria1452GRE12B+107N=59B54N81B88N+120B2.519.520.54.751284-27.2
91Megagiannis, Konstantinos0GRE28B59N=87B+120N75B+93N57B2.519.520.54.757330.0
92Gkadakis, Dimitrios1441GRE23B+115N56B+95N45B=89NF2.518.518.55.251278-13.2
93Kountrias, Apostolos1496GRE9B44N=95N88B+124N91B+112N2.518.018.53.259590.0
94Vitolianos, Georgios0GREF25B=80N16B85N+118B+110N2.518.018.04.0013710.0
95Karastatira, Chrysanthi0GRE52B=75N=93B92B=86N106B+118N2.516.017.05.0012630.0
96Malamousi, Evanthia0GRE37N80B+123N67B74N=112B+113N2.516.017.03.257300.0
97Alexakis, Aleksandros1502GRE10N+101B77N+86BF=111BF2.514.014.05.251581+4.8
98Thomaidis, Konstantinos0GREF33N=81B+79B48N=42N45B2.022.022.06.5014480.0
99Kalyva, Ioanna1593GRE+44B=64N=43B41N27BFF2.019.519.57.50672-53.2
100FIDE 5410268100+59B28N45B70B83N+119NF2.019.019.04.5013730.0
101FIDE 42156971056B97N+116B27N+102B68N82N2.018.520.03.507000.0
102FIDE 42191262070N+111B35N17B101N104B+123B2.017.518.52.5013010.0
103Skarla, Maria Eleni0GRE31N67B+121N36B71NF+107B2.017.018.03.007270.0
104FIDE 541008669011B72N115B+116N107B+102N83B2.016.518.03.507650.0
105Paraskevopoulou, Aikaterini1475GREFF29N+113B25N+83B73N2.016.516.54.50780-41.2
106Kastanis, Konstantinos1545GRE+115B5N41B109NF+95NF2.016.016.04.00777-36.0
107Karastatiras, Theodoros0GRE61N90B86N+121B+104N73B103N2.015.016.03.007200.0
108Kastani, Christina1450GRE84N74B83N+124B+112N71BF2.014.014.02.008580.0
109FIDE 25814931047N14B+112N+106BFFF2.012.512.53.5015090.0
110Apostolou, Minas1456GRE5BF7B+119N65B=114N94B1.519.519.51.75830-33.2
111Zlatkov, Boris1424BUL34B102NF+114N46B=97N59B1.517.517.52.751246-29.6
112FIDE 541026799024B58N109B+125N108B=96N93B1.517.017.51.757090.0
113FIDE 541023463040B68N+125B105N114B=115N96B1.514.515.01.257140.0
114FIDE 42191238051B78NF111B+113N=110B58N1.514.514.52.2510860.0
115FIDE 5410086850106N92B+104N82B122N=113B86N1.513.514.52.756740.0
116Papadimitratou, Maria0GRE66N82B101N104B121N+124B=125N1.511.512.00.756830.0
117FIDE 5410268020F=37B+48N52BFFF1.511.511.56.0016070.0
118FIDE 5410047870F21N39B87N+120B94N95B1.017.017.01.007820.0
119FIDE 5410267800F31B53N110B79N100B+121N1.015.015.01.007310.0
120FIDE 5410132390F42N54B91B118N+121B90N1.014.514.51.007180.0
121FIDE 42192552046B57N103B107N+116B120N119B1.014.015.01.506860.0
122FIDE 5410048170FF72B68N+115B67N66N1.013.513.51.507160.0
123Krastinsh, Krists0BUL81B55N96BF+125BF102N1.013.513.50.507120.0
124FIDE 42191211062B=63N75B108N93B116NF0.515.015.01.5012060.0
125FIDE 42198658053N17B113N112B123NF=116B0.514.014.00.757200.0
126Kalfas, Charalampos1447GRE2BFFFFFF0.06.06.00.00853-9.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets