21st Siaperas Triantafyllos Open 2026

Open SwissStandard

54 players participated in this 7-round tournament, held from 10 Jan 2026 to 28 Feb 2026 in Athens, Greece. 1 titled players from 3 federations. Top 10 Elo average was 1967, and top seed was Haritomeni Markantonaki (🇬🇷 GRE, WFM, 2143).

Georgios Poulos (🇬🇷 GRE, 1976) won with 5.5/7, ahead of Prokopios Fessas (5.0) and Ioannis Kiryttopoulos (5.0). Poulos shared the lead from round 6 and broke clear in the final round.

The biggest upset came in round 7: Dimitrios Vazelakis (1840) beat Haritomeni Markantonaki (WFM, 2143), a +303-point gap.

Location

🇬🇷Athens, Greece

Dates

10 Jan 2026 → 28 Feb 2026

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 7 rounds

Top seed

🇬🇷WFMHaritomeni Markantonaki2143

Avg top 10

1,967

Participants

Titled players · 1

WFM×1

Federations · 3 represented

🇬🇷Greece×51

🇯🇴Jordan×1

🇬🇪Georgia×1

Top 3

🥇
Georgios Poulos
🇬🇷GRE·1976
5.5pts·2083perf+18.2
🥈
Prokopios Fessas
🇬🇷GRE·1953
5.0pts·1971perf+5.6
🥉
Ioannis Kiryttopoulos
🇬🇷GRE·1893
5.0pts·1926perf+18.0

How it unfolded

Top 6 · 7 rounds

Georgios Poulos led from R7; +0.5-point edge over the runner-up. Title race converged from 5 co-leaders at R4 to 1 by R7.

Co-leaders

Poulos5.5Kiryttopoulos5Fessas5Vazelakis5Bartzos5Antoniadis5

R7 · LEADER CHANGE28 Feb

Georgios Poulos takes the sole lead (5.5/7).

R5 · HEAD-TO-HEAD · WINNER VS 2ND

Georgios Poulos drew with Ioannis Kiryttopoulos (Black).

R1–R3 · WIN STREAK

Georgios Poulos won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Georgios Poulos	*	½	1	—
2Ioannis Kiryttopoulos	½	*	—	—
3Prokopios Fessas	0	—	*	½
4Dimitrios Vazelakis	—	—	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Poulos, Georgios	1976	GRE	+36N	+38B	+6N	=4B	=3N	+2B	=8N	5.5	27.0	29.0	21.50	2083	+18.2
2	Fessas, Prokopios	1953	GRE	+19N	+20B	=11N	+5B	=7B	−1N	+15B	5.0	27.0	30.0	19.75	1971	+5.6
3	Kiryttopoulos, Ioannis	1893	GRE	+41B	=12N	+22B	+28N	=1B	=4N	=5B	5.0	25.5	27.5	17.50	1926	+18.0
4	Antoniadis, Artiom	1929	GRE	+29N	+23B	+42N	=1N	+10B	=3B	−9N	5.0	25.5	27.5	17.25	2027	+20.4
5	Bartzos, Iasonas	1788	GRE	+34N	=16B	+25N	−2N	+28B	+18B	=3N	5.0	22.5	25.0	15.75	1963	+68.4
6	Hatzistamatiou, Nikolaos	1855	GRE	+48B	+53N	−1B	+21N	+20B	−10N	+13B	5.0	21.5	21.5	11.50	1916	+10.0
7	Vazelakis, Dimitrios	1840	GRE	+37N	F	=21B	+24B	=2N	+16B	+10N	5.0	21.0	21.0	17.00	2102	+39.0
8	Sideris, Theodoros	1886	GRE	−23N	+37B	=29N	+49B	+40N	+11B	=1B	5.0	19.5	21.0	14.00	1853	-2.2
9	Garyfallou, Dimosthenis	1823	GRE	F	+50B	=17N	+36B	=16N	+15N	+4B	5.0	19.0	19.0	15.50	2083	+38.2
10	Markantonaki, HaritomeniWFM	2143	GRE	=17N	+27B	+40N	+11B	−4N	+6B	−7B	4.5	26.0	28.0	16.25	1902	-33.0
11	Troupis, Theodoros	1749	GRE	+51B	+15N	=2B	−10N	+39B	−8N	+31N	4.5	22.5	23.5	11.50	1924	+32.4
12	Moatasim Mahmoud	1711	JOR	+45N	=3B	=18N	−16B	+37N	+30B	=21N	4.5	19.5	21.5	12.25	1788	+26.0
13	Chatzinikolaou, Alexandros	1690	GRE	−42N	+31B	+47N	=18B	=17N	+20B	−6N	4.0	19.5	21.0	10.50	1784	+17.4
14	Tarasoulea, Panagiota	1614	GRE	−15B	=52N	+54B	F	+47N	=22B	+20N	4.0	14.5	14.5	6.25	1812	+39.2
15	Delithanasis, Dimitrios	1964	GRE	+14N	−11B	=49N	+17B	+22N	−9B	−2N	3.5	25.0	26.5	11.25	1751	-36.4
16	Ignatiadis, Konstantinos	1970	GRE	+49B	=5N	=28B	+12N	=9B	−7N	F	3.5	23.5	23.5	12.25	1815	-22.0
17	Matthaiou, Theodoros	1709	GRE	=10B	+43N	=9B	−15N	=13B	+24N	F	3.5	22.5	24.5	11.75	1867	+42.7
18	Ladas, Dimitrios	1949	GRE	+33B	=22N	=12B	=13N	+38B	−5N	F	3.5	22.0	24.0	10.25	1784	-23.2
19	Bitzios, Dimitrios	1657	GRE	−2B	=30N	−43B	+52N	+44B	F	+32N	3.5	14.5	14.5	6.25	1587	-9.8
20	Theodosiou, Ioannis	1719	GRE	+52B	−2N	+48B	+42B	−6N	−13N	−14B	3.0	21.5	22.0	4.00	1661	-10.6
21	Gkogka, Klevis	1613	GRE	F	+26B	=7N	−6B	+36N	F	=12B	3.0	21.5	21.5	9.75	1838	+29.8
22	Ntaifas, Ioannis	1754	GRE	+32N	=18B	−3N	F	−15B	=14N	+37B	3.0	21.0	23.0	8.25	1729	-3.0
23	Tsampas, Charalampos	1622	GRE	+8B	−4N	−24B	+45N	−26B	+41N	F	3.0	20.0	20.0	9.00	1691	+7.0
24	Sifonios, Panagiotis	1791	GRE	+31B	−42B	+23N	−7N	F	−17B	+35B	3.0	18.5	18.5	8.00	1713	-11.6
25	Afantiti, Maria Varvara	1687	GRE	F	+46N	−5B	=30N	+33B	=26N	F	3.0	18.5	18.5	7.25	1658	-5.6
26	Xynidi, Areti	1751	GRE	F	−21N	=44B	F	+23N	=25B	+27N	3.0	18.0	18.0	8.50	1705	-12.0
27	Zervos, Konstantinos	1654	GRE	F	−10N	−30B	+54N	+43B	+38N	−26B	3.0	14.0	14.0	4.00	1636	-4.8
28	Nikolopoulos, Nikolaos S	1727	GRE	+47N	+39B	=16N	−3B	−5N	F	F	2.5	21.5	23.0	5.25	1795	+18.8
29	Zikos, Georgios P	1624	GRE	−4B	+51N	=8B	F	−32N	+47B	F	2.5	19.5	20.5	5.00	1625	-1.0
30	Latifi, Dionysia	1455	GRE	−38N	=19B	+27N	=25B	F	−12N	=33N	2.5	18.5	20.0	7.50	1631	+48.0
31	Tzannis, Panayotis	1481	GRE	−24N	−13N	=41B	+46B	+48N	F	−11B	2.5	17.5	19.0	4.50	1510	+3.6
32	Kalamitsis, Ioannis	1450	GRE	−22B	−33N	+35B	=48N	+29B	F	−19B	2.5	16.5	18.0	5.75	1592	+41.6
33	Atmatzidi Oikonomidi, Iro	1632	GRE	−18N	+32B	−39N	+34B	−25N	F	=30B	2.5	16.0	18.0	6.25	1592	-8.6
34	Nikolakis, Konstantinos	1457	GRE	−5B	−49N	+51B	−33N	+45B	=50N	F	2.5	15.0	16.0	3.75	1477	+1.0
35	Hilaj, Oresti	1622	GRE	−39N	−47B	−32N	=41N	+54B	+46B	−24N	2.5	13.0	13.0	3.00	1238	-86.0
36	Papamichael, Georgios	1671	GRE	−1B	+41N	+53B	−9N	−21B	F	F	2.0	19.5	19.5	2.00	1525	-15.8
37	Gourgiotis, Nestor	1507	GRE	−7B	−8N	+52B	+53N	−12B	F	−22N	2.0	19.5	19.5	0.50	997	-25.2
38	Tsopelas, Marinos	1787	GRE	+30B	−1N	F	+50B	−18N	−27B	F	2.0	18.0	18.0	4.00	1659	-32.8
39	Vlahopoulos, Panagiotis	1894	GRE	+35B	−28N	+33B	F	−11N	F	F	2.0	17.0	17.0	5.00	1684	-21.2
40	Kiryttopoulou, Eleonora Kaisa	1736	GRE	F	+44N	−10B	+43N	−8B	F	F	2.0	16.0	16.0	4.00	1772	+5.6
41	Pispirigkos, Konstantinos	1457	GRE	−3N	−36B	=31N	=35B	+51N	−23B	F	2.0	16.0	16.0	3.50	1491	+4.8
42	Nemtsas, Hristoforos	2000	GRE	+13B	+24N	−4B	−20N	F	F	F	2.0	15.0	15.0	7.00	1783	-21.4
43	Xynidis, Maximos	1489	GRE	F	−17B	+19N	−40B	−27N	+51B	F	2.0	15.0	15.0	4.50	1564	+17.6
44	Gkogka, Elvis	1587	GRE	F	−40B	=26N	=47B	−19N	+48B	F	2.0	13.5	13.5	3.75	1562	-3.6
45	Kazantzoglou, Aristotelis	0	GRE	−12B	−48N	F	−23B	−34N	+53B	+54N	2.0	11.5	11.5	0.00	800	-79.2
46	Afantiti, Stavroula Chrysovalanto	0	GRE	F	−25B	−50N	−31N	+53B	−35N	+47B	2.0	11.0	11.0	1.50	1328	0.0
47	Ntovas, Dimitrios	1430	GRE	−28B	+35N	−13B	=44N	−14B	−29N	−46N	1.5	17.5	19.5	3.50	1452	+2.4
48	Travlos, Markos	1607	GRE	−6N	+45B	−20N	=32B	−31B	−44N	F	1.5	17.0	17.0	3.25	1252	-76.8
49	Latifis, Panagiotis	1660	GRE	−16N	+34B	=15B	−8N	F	F	F	1.5	16.5	16.5	4.25	1732	+10.0
50	Vachadze, Tamta	1627	GEO	F	−9N	+46B	−38N	F	=34B	F	1.5	16.0	16.0	3.25	1417	-29.2
51	Syngounis, Filippos	1432	GRE	−11N	−29B	−34N	F	−41B	−43N	+53N	1.0	13.5	13.5	0.00	756	-69.2
52	Chatzinikolaou, Nina Loukia	0	GRE	−20N	=14B	−37N	−19B	F	F	F	0.5	12.5	12.5	2.00	1302	0.0
53	Makavelos, Vasilios	0	GRE	F	−6B	−36N	−37B	−46N	−45N	−51B	0.0	14.0	14.0	0.00	815	0.0
54	FIDE 541017404	0	—	F	F	−14N	−27B	−35N	F	−45B	0.0	11.5	11.5	0.00	831	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Bartzos, IasonasGRE
+68.4
5.0 pts · #5
2Latifi, DionysiaGRE
+48.0
2.5 pts · #28
3Matthaiou, TheodorosGRE
+42.7
3.5 pts · #16

Top rating losers

1Hilaj, OrestiGRE
-86.0
2.5 pts · #46
2Kazantzoglou, AristotelisGRE
-79.2
2.0 pts · #53
3Travlos, MarkosGRE
-76.8
1.5 pts · #49

Biggest upsets

R7+303 Elo gap
Vazelakis, Dimitrios1840 beat WFMMarkantonaki, Haritomeni2143
R4+281 Elo gap
Theodosiou, Ioannis1719 beat Nemtsas, Hristoforos2000
R1+264 Elo gap
Tsampas, Charalampos1622 beat Sideris, Theodoros1886