4th Open AO Leonteiou O. Vazelakis 2025
24 players participated in this 6-round tournament, held from 15 Nov 2025 to 20 Dec 2025 in Athens, Greece. Top 10 Elo average was 1638, and top seed was Christos Nikolaos Deligiannis (🇬🇷 GRE, 2003).
Nikolaos Koliousis (🇬🇷 GRE, 1661) won with 5.5/6, ahead of Vasileios N Lanaras (4.0) and Omar El Champasi (4.0). Koliousis won solo starting round 3.
The biggest upset came in round 2: Marios Nikolaos Katsaros (1621) beat Panagiotis Sifonios (1755), a +134-point gap.
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How it unfolded
Top 6 · 6 roundsNikolaos Koliousis led from R3; +1.5-point edge over the runner-up.
Nikolaos Koliousis never relinquished the lead after R3; final gap +1.5 over the runner-up.
Nikolaos Koliousis drew with Vasileios N Lanaras (Black).
Nikolaos Koliousis 4 wins (R1–R4)Omar El Champasi 3 wins (R3–R5)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Nikolaos Koliousis | * | ½ | 1 | — |
| 2Vasileios N Lanaras | ½ | * | — | ½ |
| 3Omar El Champasi | 0 | — | * | — |
| 4Marios Nikolaos Katsaros | — | ½ | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Koliousis, Nikolaos | 1661 | GRE | +14N | +9B | +16N | +4B | =2N | +3N | 5.5 | 16.5 | 18.5 | 16.50 | 2246 | +13.6 |
| 2 | Lanaras, Vasileios N | 0 | GRE | +10N | +5B | =6N | +20B | =1B | −11N | 4.0 | 18.5 | 20.0 | 12.50 | 1685 | 0.0 |
| 3 | El Champasi, Omar | 0 | GRE | +7B | −4N | +15B | +17N | +20N | −1B | 4.0 | 16.0 | 17.5 | 8.50 | 1706 | -20.0 |
| 4 | Androulakis, Radamanthys Pavlos | 1502 | GRE | +23N | +3B | =20B | −1N | −9B | +17N | 3.5 | 16.0 | 16.0 | 6.75 | 1427 | -5.2 |
| 5 | Panagoiliopoulos, Marios | 1536 | GRE | +18B | −2N | −11B | +19N | =13B | +20N | 3.5 | 13.5 | 15.0 | 6.75 | 1156 | -3.2 |
| 6 | Katsaros, Marios Nikolaos | 1621 | GRE | F | +7N | =2B | +8N | +16B | F | 3.5 | 12.0 | 12.0 | 10.00 | 2369 | +52.8 |
| 7 | Sifonios, Panagiotis | 1755 | GRE | −3N | −6B | F | +18N | +8B | +15B | 3.0 | 14.5 | 14.5 | 7.00 | 1747 | -0.2 |
| 8 | Osmani, Sokol | 1512 | GRE | F | +18N | +13B | −6B | −7N | +14B | 3.0 | 13.0 | 13.0 | 6.50 | 884 | -11.2 |
| 9 | Nomikos, Goulielmos | 1438 | GRE | +21B | −1N | F | +14B | +4N | F | 3.0 | 12.0 | 12.0 | 6.50 | 1560 | +12.4 |
| 10 | Tsitsiridakis, Evangelos | 1488 | GRE | −2B | F | +14N | +21B | −15N | +18N | 3.0 | 11.0 | 11.0 | 5.00 | 939 | -7.6 |
| 11 | Deligiannis, Christos Nikolaos | 2003 | GRE | F | +13B | +5N | F | F | +2B | 3.0 | 10.0 | 10.0 | 10.00 | 2404 | +1.6 |
| 12 | Brazios, Konstantinos | 1516 | GRE | +22B | −20N | +19B | −16N | +17B | F | 3.0 | 10.0 | 10.0 | 4.00 | 1499 | -1.6 |
| 13 | Gourgiotis, Nestor | 0 | GRE | +17B | −11N | −8N | +24B | =5N | F | 2.5 | 14.5 | 14.5 | 3.75 | 1556 | -4.4 |
| 14 | FIDE 42160677 | 0 | — | −1B | +21N | −10B | −9N | +22B | −8N | 2.0 | 15.5 | 15.5 | 1.00 | 725 | 0.0 |
| 15 | Chatzinikolaou, Alexandros | 1738 | GRE | +19B | F | −3N | F | +10B | −7N | 2.0 | 14.0 | 14.0 | 5.00 | 1622 | -5.8 |
| 16 | Chatzinikolaou, Nina Loukia | 1459 | GRE | +24N | F | −1B | +12B | −6N | F | 2.0 | 14.0 | 14.0 | 3.00 | 1472 | 0.0 |
| 17 | XIANG, ZIHUI | 1532 | GRE | −13N | +23B | +22N | −3B | −12N | −4B | 2.0 | 13.0 | 13.0 | 0.00 | 687 | -48.0 |
| 18 | Dolgyras, Petros | 0 | GRE | −5N | −8B | +24N | −7B | +23N | −10B | 2.0 | 12.5 | 12.5 | 0.00 | 778 | 0.0 |
| 19 | Bratsos, Konstantinos | 0 | GRE | −15N | +24B | −12N | −5B | +21N | F | 2.0 | 9.5 | 9.5 | 1.00 | 804 | 0.0 |
| 20 | Syngounis, Filippos | 0 | GRE | F | +12B | =4N | −2N | −3B | −5B | 1.5 | 18.0 | 18.0 | 4.75 | 1510 | +14.4 |
| 21 | FIDE 42184851 | 0 | — | −9N | −14B | F | −10N | −19B | +24N | 1.0 | 10.0 | 10.0 | 0.00 | 664 | 0.0 |
| 22 | FIDE 541016890 | 0 | — | −12N | F | −17B | F | −14N | F | 0.0 | 12.0 | 14.0 | 0.00 | 736 | 0.0 |
| 23 | FIDE 541016904 | 0 | — | −4B | −17N | F | F | −18B | F | 0.0 | 10.5 | 10.5 | 0.00 | 707 | 0.0 |
| 24 | FIDE 42180341 | 0 | — | −16B | −19N | −18B | −13N | F | −21B | 0.0 | 9.5 | 9.5 | 0.00 | 642 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Katsaros, Marios NikolaosGRE+52.83.5 pts · #1
- 2Syngounis, FilipposGRE+14.41.5 pts · #6
- 3Koliousis, NikolaosGRE+13.65.5 pts · #3
- 1XIANG, ZIHUIGRE-48.02.0 pts · #17
- 2El Champasi, OmarGRE-20.04.0 pts · #4
- 3Osmani, SokolGRE-11.23.0 pts · #23
- R2+134 Elo gap