ACC Sirius open U2000 Dec 2025
Open SwissStandard
12 players participated in this 5-round tournament, held from 21 Dec 2025 to 18 Jan 2026 in Petroupoli, Greece. Top 10 Elo average was 1175, and top seed was Konstantinos Kesoglou (🇬🇷 GRE, 1905).
Antonios Pavlis (🇬🇷 GRE, 1716) won with 4.5/5, ahead of Konstantinos Kesoglou (4.0) and Evangelos Tsourapas (3.0). Pavlis took the lead from round 4.
The biggest upset came in round 4: Antonios Pavlis (1716) beat Konstantinos Kesoglou (1905), a +189-point gap.
Location
🇬🇷Petroupoli, Greece
Dates
21 Dec 2025 → 18 Jan 2026
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Federations · 1 represented
🇬🇷Greece×12
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 5 roundsAntonios Pavlis led from R4; +0.5-point edge over the runner-up.
Co-leaders
4
2
1
1
1
R4 · LEADER CHANGE11 Jan
Antonios Pavlis takes the sole lead (3.5/4).
R4 · HEAD-TO-HEAD · WINNER VS 2ND
Antonios Pavlis beat Konstantinos Kesoglou (White).
WIN STREAKS · 2 top finishers
Antonios Pavlis 4 wins (R2–R5)Konstantinos Kesoglou 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Antonios Pavlis | * | 1 | — | 1 |
| 2Konstantinos Kesoglou | 0 | * | 1 | 1 |
| 3Ilias I. Mastoras | — | 0 | * | — |
| 4Evangelos Tsourapas | 0 | 0 | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Pavlis, Antonios | 1716 | GRE | =8N | +10B | +6N | +2B | +3B | 4.5 | 11.0 | 11.0 | 10.25 | 1961 | +17.0 |
| 2 | Kesoglou, Konstantinos | 1905 | GRE | +5B | +9N | +3B | −1N | +4B | 4.0 | 13.5 | 14.5 | 10.00 | 1824 | -7.6 |
| 3 | Tsourapas, Evangelos | 0 | GRE | +?B | +7B | −2N | +6B | −1N | 3.0 | 13.5 | 13.5 | 5.00 | 1743 | 0.0 |
| 4 | Mastoras, Ilias I. | 1821 | GRE | =6N | +8B | =7N | +5B | −2N | 3.0 | 12.0 | 13.5 | 7.00 | 1795 | -1.8 |
| 5 | Rafeletos, Apostolis | 1516 | GRE | −2N | +11B | +12B | −4N | +7B | 3.0 | 9.5 | 9.5 | 2.50 | 1680 | +19.6 |
| 6 | Chatzimarinakis, Pavlos | 0 | GRE | =4B | +?N | −1B | −3N | +8N | 2.5 | 12.0 | 12.0 | 3.00 | 1725 | 0.0 |
| 7 | Kratidis, Anastasios | 1660 | GRE | +11B | −3N | =4B | +8B | −5N | 2.5 | 10.5 | 10.5 | 3.00 | 1664 | -1.0 |
| 8 | Kapagiannidis, Konstantinos | 1672 | GRE | =1B | −4N | +9B | −7N | −6B | 1.5 | 12.5 | 13.5 | 3.25 | 1469 | -13.0 |
| 9 | Georgopoulos, Georgios D | 0 | GRE | +12N | −2B | −8N | −?B | F | 1.0 | 5.5 | 5.5 | 0.00 | 941 | 0.0 |
| 10 | Nikolakis, Konstantinos | 1462 | GRE | F | −1N | F | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 926 | -3.4 |
| 11 | Giannakeas, Panayotis | 0 | GRE | −7N | −5N | F | F | F | 0.0 | 5.5 | 5.5 | 0.00 | 798 | 0.0 |
| 12 | Papasotiriou, Markella | 0 | GRE | −9B | F | −5N | F | F | 0.0 | 4.0 | 4.0 | 0.00 | 717 | -18.4 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Rafeletos, ApostolisGRE+19.63.0 pts · #7
- 2Pavlis, AntoniosGRE+17.04.5 pts · #1
- 3Giannakeas, PanayotisGRE0.00.0 pts · #12
Top rating losers
- 1Papasotiriou, MarkellaGRE-18.40.0 pts · #11
- 2Kapagiannidis, KonstantinosGRE-13.01.5 pts · #8
- 3Kesoglou, KonstantinosGRE-7.64.0 pts · #5
Biggest upsets
- R4+189 Elo gap
- R5+144 Elo gap