Open Chess ACC U1800 Mar 2026
16 players participated in this 5-round tournament, held from 28 Feb 2026 to 30 Mar 2026 in Petroupoli, Greece. Top 10 Elo average was 1695, and top seed was Ilias I. Mastoras (🇬🇷 GRE, 1790).
Konstantinos Patsiotis (🇬🇷 GRE, 1701) won with 4.5/5, ahead of Konstantinos Kapagiannidis (4.5) and Panagiotis Latifis (3.5). Patsiotis shared the lead from round 4, winning on tie-break.
The biggest upset came in round 5: Panagiotis Latifis (1660) beat Nikolaos Alexandros Dallas (1779), a +119-point gap.
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How it unfolded
Top 6 · 5 roundsTight race until R5; 2 players tied at 4.5/5, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 2 at the finish.
2 players finish on 4.5/5. Patsiotis takes the title on Buchholz Cut1 (13.0).
Konstantinos Patsiotis drew with Konstantinos Kapagiannidis (White).
Konstantinos Patsiotis 3 wins (R3–R5)Konstantinos Kapagiannidis 3 wins (R3–R5)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Konstantinos Patsiotis | * | ½ | — | 1 |
| 2Konstantinos Kapagiannidis | ½ | * | 1 | — |
| 3Panagiotis Latifis | — | 0 | * | ½ |
| 4Ilias I. Mastoras | 0 | — | ½ | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Patsiotis, Konstantinos | 1701 | GRE | +6N | =2B | +5N | +4B | +8N | 4.5 | 13.0 | 15.0 | 12.75 | 1992 | +67.6 |
| 2 | Kapagiannidis, Konstantinos | 1683 | GRE | +12B | =1N | +7B | +3N | +4B | 4.5 | 13.0 | 14.0 | 11.75 | 1980 | +27.4 |
| 3 | Latifis, Panagiotis | 1660 | GRE | +16N | =5B | +10N | −2B | +9B | 3.5 | 11.0 | 11.0 | 5.00 | 1850 | +52.4 |
| 4 | El Champasi, Omar | 1723 | GRE | +8B | +7N | +9B | −1N | −2N | 3.0 | 13.0 | 15.0 | 6.00 | 1695 | -2.8 |
| 5 | Mastoras, Ilias I. | 1790 | GRE | +11B | =3N | −1B | =6N | +7N | 3.0 | 12.5 | 14.0 | 6.50 | 1647 | -16.2 |
| 6 | Kiloukiotis, Dimitrios | 1482 | GRE | −1B | +12N | F | =5B | +10N | 2.5 | 11.0 | 12.0 | 4.00 | 1675 | +28.8 |
| 7 | Osmani, Sokol | 1521 | GRE | +14N | −4B | −2N | +11N | −5B | 2.0 | 12.0 | 12.5 | 2.00 | 1488 | -3.8 |
| 8 | Papasotiriou, Markella | 1485 | GRE | −4N | +14B | F | +13N | −1B | 2.0 | 11.0 | 11.5 | 1.50 | 1499 | +3.2 |
| 9 | Dallas, Nikolaos Alexandros | 1779 | GRE | F | +13B | −4N | +10B | −3N | 2.0 | 9.0 | 9.0 | 2.50 | 1603 | -17.8 |
| 10 | Kilakos, Dimitrios | 1563 | GRE | =15B | +11N | −3B | −9N | −6B | 1.5 | 9.5 | 10.0 | 1.75 | 1495 | -9.4 |
| 11 | Mylonas, Athanasios | 1585 | GRE | −5N | −10B | +14N | −7B | =12N | 1.5 | 7.5 | 8.0 | 1.00 | 823 | -48.0 |
| 12 | FIDE 541027485 | 0 | — | −2N | −6B | −13N | =14B | =11B | 1.0 | 9.5 | 10.0 | 1.00 | 1220 | 0.0 |
| 13 | Cenaj, Oltian | 1471 | GRE | F | −9N | +12B | −8B | F | 1.0 | 5.5 | 5.5 | 1.00 | 824 | -25.6 |
| 14 | Chanialidis, Angelos | 0 | GRE | −7B | −8N | −11B | =12N | F | 0.5 | 6.5 | 7.5 | 0.50 | 711 | 0.0 |
| 15 | Kazakos, Panteleimon | 1761 | GRE | =10N | F | F | F | F | 0.5 | 1.5 | 1.5 | 0.75 | 1562 | -5.2 |
| 16 | Nikolaras, Konstantinos | 1705 | GRE | −3B | F | F | F | F | 0.0 | 4.0 | 4.0 | 0.00 | 855 | -11.4 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Patsiotis, KonstantinosGRE+67.64.5 pts · #1
- 2Latifis, PanagiotisGRE+52.43.5 pts · #2
- 3Kiloukiotis, DimitriosGRE+28.82.5 pts · #7
- 1Mylonas, AthanasiosGRE-48.01.5 pts · #13
- 2Cenaj, OltianGRE-25.61.0 pts · #16
- 3Dallas, Nikolaos AlexandrosGRE-17.82.0 pts · #6
- R5+119 Elo gap