Open Chess ACC Nov 2025 A and B
14 players participated in this 5-round tournament, held from 05 Nov 2025 to 10 Dec 2025 in Petroupoli, Greece. Top 10 Elo average was 1596, and top seed was Nikolaos Hatzistamatiou (🇬🇷 GRE, 1850).
Konstantinos Patsiotis (🇬🇷 GRE, 1477) won with 3.5/5, ahead of Konstantinos Kapagiannidis (3.5) and Pantelis Nezis (3.0). Patsiotis shared the lead from round 4, winning on tie-break.
The biggest upset came in round 3: Konstantinos Patsiotis (1477) beat Manos Kazalis (1809), a +332-point gap.
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How it unfolded
Top 6 · 5 roundsTight race until R3; 2 players tied at 3.5/5, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.
Konstantinos Kapagiannidis held the sole lead from R3 through R5 without losing it.
2 players finish on 3.5/5. Patsiotis takes the title on Buchholz Cut1 (11.0).
Konstantinos Kapagiannidis drew with Konstantinos Patsiotis (White).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Konstantinos Kapagiannidis | * | ½ | — | 1 |
| 2Konstantinos Patsiotis | ½ | * | 1 | — |
| 3Manos Kazalis | — | 0 | * | 0 |
| 4Pantelis Nezis | 0 | — | 1 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Patsiotis, Konstantinos | 1477 | GRE | =5N | =10B | +4B | +6N | =2N | 3.5 | 11.0 | 12.5 | 8.75 | 1799 | +62.4 |
| 2 | Kapagiannidis, Konstantinos | 1659 | GRE | +10N | +9B | +3N | F | =1B | 3.5 | 10.5 | 12.0 | 7.75 | 1819 | +11.6 |
| 3 | Nezis, Pantelis | 1483 | GRE | +12B | +4N | −2B | +7N | F | 3.0 | 11.0 | 12.0 | 6.00 | 1771 | +21.2 |
| 4 | Kazalis, Manos | 1809 | GRE | +7N | −3B | −1N | +9B | +11N | 3.0 | 10.0 | 11.5 | 5.00 | 1559 | -27.0 |
| 5 | Hatzistamatiou, Nikolaos | 1850 | GRE | =1B | +8N | +6N | F | F | 2.5 | 12.0 | 14.0 | 5.75 | 1764 | -3.0 |
| 6 | El Champasi, Omar | 0 | GRE | +8N | +11N | −5B | −1B | F | 2.0 | 9.5 | 11.0 | 3.50 | 1630 | -32.4 |
| 7 | Evangelis, Markos Theofanis | 1472 | GRE | −4B | +12N | +13B | −3B | F | 2.0 | 9.0 | 10.0 | 2.00 | 1477 | -1.6 |
| 8 | Galerakis, Panagiotis Spyridon | 1667 | GRE | −6B | −5B | +14N | +12N | F | 2.0 | 7.5 | 7.5 | 1.00 | 1050 | -10.4 |
| 9 | Pritsinis, Ioannis | 1472 | GRE | +13B | −2N | =11B | −4N | F | 1.5 | 10.0 | 11.0 | 1.75 | 1539 | +10.4 |
| 10 | Kiloukiotis, Dimitrios | 1496 | GRE | −2B | =1N | −12B | +14N | F | 1.5 | 9.0 | 9.0 | 1.75 | 1374 | -12.8 |
| 11 | Vafeiadakis, Michail | 1530 | GRE | +14N | −6B | =9N | F | −4B | 1.5 | 7.5 | 7.5 | 0.75 | 1447 | -9.6 |
| 12 | Mavrouleas, Panagiotis Petros | 0 | GRE | −3N | −7B | +10N | −8B | F | 1.0 | 8.5 | 8.5 | 1.50 | 1338 | 0.0 |
| 13 | Kiriazis, Hrisanthos | 1514 | GRE | −9N | +14B | −7N | F | F | 1.0 | 6.5 | 6.5 | 0.00 | 671 | -44.0 |
| 14 | Giakoumis, Thyseas | 0 | GRE | −11B | −13N | −8B | −10B | F | 0.0 | 6.0 | 7.0 | 0.00 | 750 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Patsiotis, KonstantinosGRE+62.43.5 pts · #3
- 2Nezis, PantelisGRE+21.23.0 pts · #5
- 3Kapagiannidis, KonstantinosGRE+11.63.5 pts · #1
- 1Kiriazis, HrisanthosGRE-44.01.0 pts · #12
- 2El Champasi, OmarGRE-32.42.0 pts · #4
- 3Kazalis, ManosGRE-27.03.0 pts · #2
- R3+332 Elo gap
- R2+326 Elo gap