2025 National Youth Championships - open U10

Open SwissStandard

51 players participated in this 9-round tournament, held from 06 Jul 2025 to 12 Jul 2025 in Thessaloniki, Greece. Top 10 Elo average was 1658, and top seed was Ioannis Kalonomos (🇬🇷 GRE, 1891).

Konstantinos Kotovos (🇬🇷 GRE, 1578) won with 7.0/9, ahead of Ioannis Kalonomos (7.0) and Vasileios Sp Alexandrakis (7.0). Kotovos won on tie-break after catching the field in the final round.

The biggest upset came in round 4: Alexandros Rompanos (1470) beat Iraklis Mekolli (1732), a +262-point gap.

Location

🇬🇷Thessaloniki, Greece

Dates

06 Jul 2025 → 12 Jul 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇬🇷Ioannis Kalonomos1891

Avg top 10

1,658

Participants

Federations · 1 represented

🇬🇷Greece×48

Top 3

🥇
Konstantinos Kotovos
🇬🇷GRE·1578
7.0pts·1741perf+46.2
🥈
Ioannis Kalonomos
🇬🇷GRE·1891
7.0pts·1783perf-32.8
🥉
Vasileios Sp Alexandrakis
🇬🇷GRE·1631
7.0pts·1806perf+77.2

How it unfolded

Top 6 · 9 rounds

Tight race until R4; 3 players tied at 7.0/9, decided on Buchholz.

Co-leaders

Alexandrakis7Kalonomos7Kotovos7Kalogeropoulos6.5Tsarouchas6.5Sidiropoulos6

R7 · LEADER CHANGE10 Jul

Panagiotis Arg Sidiropoulos takes the sole lead (6.0/7).

R9 · TIEBREAK CLUSTER

3 players finish on 7.0/9. Kotovos takes the title on Buchholz Cut1 (49.0).

R7 · HEAD-TO-HEAD · WINNER VS 2ND

Vasileios Sp Alexandrakis drew with Ioannis Kalonomos (Black).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Vasileios Sp Alexandrakis	*	½	0	1
2Ioannis Kalonomos	½	*	½	½
3Konstantinos Kotovos	1	½	*	½
4Konstantinos Kalogeropoulos	0	½	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Kotovos, Konstantinos	1578	GRE	+36N	+13B	=4N	+7B	=2N	+3B	−6N	+11B	+12N	7.0	49.0	53.0	40.25	1741	+46.2
2	Kalonomos, Ioannis	1891	GRE	+9B	+32N	+6B	=23N	=1B	+24N	=3B	+5N	=4N	7.0	48.0	52.5	40.00	1783	-32.8
3	Alexandrakis, Vasileios Sp	1631	GRE	+41B	+19N	+24B	+4N	+23B	−1N	=2N	+6B	=7N	7.0	46.5	50.0	36.50	1806	+77.2
4	Kalogeropoulos, Konstantinos	1656	GRE	+18B	+28N	=1B	−3B	=11N	+39N	+16B	+8N	=2B	6.5	47.0	50.5	33.75	1723	+86.4
5	Tsarouchas, Athanasios	1593	GRE	+17B	+27N	−23B	+20N	=19B	+18N	+13B	−2B	+6N	6.5	43.0	47.5	33.50	1676	+30.4
6	Sidiropoulos, Panagiotis Arg	1611	GRE	+31B	+20N	−2N	+16B	+10B	+25N	+1B	−3N	−5B	6.0	48.0	52.5	32.00	1693	+39.6
7	Gkountroumpis, Ioannis	1555	GRE	+33B	+39N	=8B	−1N	−18B	+27N	+30B	+24N	=3B	6.0	42.5	46.0	27.50	1509	-22.4
8	Mekolli, Iraklis	1732	GRE	+38N	=16B	=7N	−13B	+31N	+26B	+15N	−4B	+19N	6.0	42.0	46.0	28.50	1572	-58.8
9	Kakagiannis, Stylianos	1452	GRE	−2N	=11B	+46N	=17B	+42N	−12B	+33N	+15B	+23N	6.0	39.5	41.5	23.75	1683	+50.8
10	Michailidis, Georgios Savvas	1505	GRE	=46N	+42B	=15N	+26B	−6N	=17B	=11N	+39B	+16N	6.0	37.5	39.5	24.75	1544	+10.8
11	Nikolaidis, Ioannis St	0	GRE	−24B	=9N	+35B	+28N	=4B	+20N	=10B	−1N	+25B	5.5	44.0	48.0	27.25	1595	+95.2
12	Skordilis, Stefanos	0	GRE	=29B	+21N	=25B	−15B	+14N	+9N	=24B	+18N	−1B	5.5	42.5	47.0	28.25	1546	0.0
13	Rompanos, Alexandros	1470	GRE	+48B	−1N	+43B	+8N	=25B	+23N	−5N	−16B	+26N	5.5	40.5	42.5	21.75	1575	+44.4
14	Tsigkogiannis, Panagiotis	1438	GRE	−23B	+51N	=39B	=34N	−12B	+48N	=21B	+28N	+24B	5.5	33.5	34.0	17.75	1666	+46.4
15	Eleftheriou, Vasileios	1480	GRE	+30B	=25N	=10B	+12N	−24B	+19N	−8B	−9N	+33B	5.0	42.0	46.0	24.25	1420	-19.6
16	Patsiotis, Konstantinos	1503	GRE	+50B	=8N	+34B	−6N	=39N	+33B	−4N	+13N	−10B	5.0	41.5	42.5	19.25	1412	-17.2
17	Katsiolis, Orestis	0	GRE	−5N	+44B	=28B	=9N	+38B	=10N	=25B	=23N	=21B	5.0	41.0	43.5	21.75	1505	0.0
18	Maragkakis, Emmanouil	1439	GRE	−4N	+50B	+48N	=40B	+7N	−5B	+35N	−12B	=22N	5.0	39.0	40.0	17.25	1545	+30.0
19	Kleisarchakis, Nikolaos Georgios	1486	GRE	+49N	−3B	+42N	+47B	=5N	−15B	=23B	+29N	−8B	5.0	38.5	40.0	16.50	1466	-14.4
20	Kourkoutas, Michail	1476	GRE	+44N	−6B	+33N	−5B	+40N	−11B	−26N	+37B	+34N	5.0	38.0	40.5	18.00	1356	-28.4
21	Ioannidis, Agis	1631	GRE	−26N	−12B	+36N	−42B	+46N	+22B	=14N	+27B	=17N	5.0	37.0	39.0	20.75	1462	-25.2
22	Lampousakis, Michail	1464	GRE	=34B	=29N	+30B	−25N	=27B	−21N	+43B	+41N	=18B	5.0	35.5	38.0	19.50	1437	-27.6
23	Bartzos, Iasonas	1655	GRE	+14N	+40B	+5N	=2B	−3N	−13B	=19N	=17B	−9B	4.5	47.5	51.0	24.00	1550	-44.4
24	Athanasopoulos, Nikolaos NA	1507	GRE	+11N	+26B	−3N	+31B	+15N	−2B	=12N	−7B	−14N	4.5	46.0	50.5	22.25	1530	+4.4
25	Kasmeridis, Orfeas	1597	GRE	+37N	=15B	=12N	+22B	=13N	−6B	=17N	=26B	−11N	4.5	42.0	46.0	21.75	1472	-45.2
26	Gkouvras, Konstantinos	1427	GRE	+21B	−24N	+45B	−10N	+34B	−8N	+20B	=25N	−13B	4.5	40.5	43.0	18.75	1511	+42.4
27	Basios, Georgios	0	GRE	+35N	−5B	−40N	+32B	=22N	−7B	+36N	−21N	+46B	4.5	38.5	40.5	17.00	1449	0.0
28	Katsoulis, Nikolaos	1501	GRE	+47N	−4B	=17N	−11B	=37N	=36B	+44N	−14B	+40N	4.5	36.5	38.5	14.50	1299	-53.2
29	Di Giorgio, Nikolaos	1465	GRE	=12N	=22B	−47N	−33B	+32N	+42B	+34N	−19B	=30N	4.5	35.5	37.5	19.00	1508	+8.8
30	Oikonomidis, Anastasios Ioannis	0	GRE	−15N	+37B	−22N	=46B	+47N	+40B	−7N	=32B	=29B	4.5	34.5	36.5	15.00	1439	0.0
31	Gkrekidis, Konstantinos	1424	GRE	−6N	+49B	+32B	−24N	−8B	−34N	+47N	+35B	=39N	4.5	34.5	36.0	13.75	1509	+24.0
32	Skoulas, Stavros	1506	GRE	+43B	−2B	−31N	−27N	−29B	+49N	+42B	=30N	+41B	4.5	34.0	35.5	12.75	1345	-31.6
33	Lampousakis, Dimitrios Christos	0	GRE	−7N	+35B	−20B	+29N	+41B	−16N	−9B	+38B	−15N	4.0	39.5	43.0	16.00	1395	0.0
34	Sousamlis, Panagiotis	0	GRE	=22N	+46B	−16N	=14B	−26N	+31B	−29B	+45N	−20B	4.0	36.5	38.5	14.25	1380	0.0
35	Siskos, Ioannis	1578	GRE	−27B	−33N	−11N	+49B	+51N	+37B	−18B	−31N	+42B	4.0	32.0	32.5	9.00	1228	-74.0
36	Arzoumanidis, Maximos	0	GRE	−1B	−45N	−21B	+50N	+43B	=28N	−27B	=46N	+49B	4.0	29.5	30.5	8.25	1246	0.0
37	Piagkalakis, Georgios	1419	GRE	−25B	−30N	+51B	=43N	=28B	−35N	+48B	−20N	+47B	4.0	29.0	29.5	8.00	1207	-37.6
38	Moustakas, Georgios	1448	GRE	−8B	−43N	+50N	+44B	−17N	+47B	−39B	−33N	+48B	4.0	27.5	28.5	7.50	931	0.0
39	Tsagkarakis, Georgios D	0	GRE	F	−7B	=14N	+45N	=16B	−4B	+38N	−10N	=31B	3.5	40.0	40.0	14.00	1399	0.0
40	Stefanis, Stefanos G	1492	GRE	+51B	−23N	+27B	=18N	−20B	−30N	−41B	+43N	−28B	3.5	34.0	34.5	10.00	1128	-71.6
41	Stefanidis, Konstantinos	1436	GRE	−3N	−47B	+49N	+48B	−33N	=44B	+40N	−22B	−32N	3.5	30.5	32.0	8.25	1333	-17.2
42	Komisopoulos, Sotirios	0	GRE	+45B	−10N	−19B	+21N	−9B	−29N	−32N	+44B	−35N	3.0	37.5	40.0	10.00	1325	0.0
43	Ouzounstefanis, Nikolaos	0	GRE	−32N	+38B	−13N	=37B	−36N	+51B	−22N	−40B	−44N	2.5	33.0	33.5	6.50	1103	0.0
44	Palaiochorinos, Ioannis	0	GRE	−20B	−17N	F	−38N	+45B	=41N	−28B	−42N	+43B	2.5	30.0	30.0	6.75	1397	0.0
45	Togias, Orestis	1576	GRE	−42N	+36B	−26N	−39B	−44N	=46B	+50N	−34B	F	2.5	24.5	24.5	6.00	601	-29.2
46	Gavras, Christoforos	0	GRE	=10B	−34N	−9B	=30N	−21B	=45N	F	=36B	−27N	2.0	36.5	36.5	8.50	1338	0.0
47	Kourouklidis, Georgios	0	GRE	−28B	+41N	+29B	−19N	−30B	−38N	−31B	F	−37N	2.0	34.5	34.5	8.00	1326	0.0
48	FIDE 541012020	0	—	−13N	F	−18B	−41N	+50B	−14B	−37N	+51B	−38N	2.0	29.0	29.0	1.50	638	0.0
49	Nerantzakis, Dimitrios	0	GRE	−19B	−31N	−41B	−35N	F	−32B	=51N	+50B	−36N	1.5	27.0	27.0	1.25	677	0.0
50	FIDE 42175348	0	—	−16N	−18N	−38B	−36B	−48N	F	−45B	−49N	+51N	1.0	24.5	24.5	0.50	701	0.0
51	FIDE 541014545	0	—	−40N	−14B	−37N	F	−35B	−43N	=49B	−48N	−50B	0.5	24.0	24.0	0.75	678	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Nikolaidis, Ioannis StGRE
+95.2
5.5 pts · #4
2Kalogeropoulos, KonstantinosGRE
+86.4
6.5 pts · #5
3Alexandrakis, Vasileios SpGRE
+77.2
7.0 pts · #1

Top rating losers

1Siskos, IoannisGRE
-74.0
4.0 pts · #41
2Stefanis, Stefanos GGRE
-71.6
3.5 pts · #42
3Mekolli, IraklisGRE
-58.8
6.0 pts · #7

Biggest upsets

R4+262 Elo gap
Rompanos, Alexandros1470 beat Mekolli, Iraklis1732
R1+204 Elo gap
Gkouvras, Konstantinos1427 beat Ioannidis, Agis1631
R9+203 Elo gap
Kakagiannis, Stylianos1452 beat Bartzos, Iasonas1655