37th open SO Peristeriou Mar 2026
Open SwissStandard
21 players participated in this 7-round tournament, held from 17 Mar 2026 to 12 May 2026 in Peristeri, Greece. Top 10 Elo average was 976, and top seed was Ioannis Ntaifas (🇬🇷 GRE, 1808).
Ioannis Ntaifas (🇬🇷 GRE, 1808) won with 6.0/7, ahead of Apostolos Mentzos (5.0) and Dimitrios Marianidis (5.0). Ntaifas won solo starting round 6.
Location
🇬🇷Peristeri, Greece
Dates
17 Mar 2026 → 12 May 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 7 rounds
Federations · 1 represented
🇬🇷Greece×13
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsIoannis Ntaifas led from R3; +1.0-point edge over the runner-up.
Co-leaders
9
3
1
1
2
1
1
R3–R7 · LEAD HELD
Ioannis Ntaifas never relinquished the lead after R3; final gap +1.0 over the runner-up.
R1–R7 · WIN STREAK
Ioannis Ntaifas won 6 in a row (R1–R7).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Ioannis Ntaifas | * | — | 1 | 1 |
| 2Apostolos Mentzos | — | * | ½ | ½ |
| 3Dimitrios Marianidis | 0 | ½ | * | — |
| 4Konstantinos Ntatsis | 0 | ½ | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ntaifas, Ioannis | 1808 | GRE | +19B | +7N | +6B | +3N | F | +5B | +4N | 6.0 | 24.5 | 26.5 | 23.50 | 2426 | +16.4 |
| 2 | Mentzos, Apostolos | 1558 | GRE | +11N | −5B | +8N | =4B | +17N | =3N | +6B | 5.0 | 24.0 | 26.5 | 17.75 | 1859 | +30.8 |
| 3 | Marianidis, Dimitrios | 1756 | GRE | +16N | =8B | +13N | −1B | +10N | =2B | +9N | 5.0 | 23.5 | 26.0 | 15.75 | 1630 | -9.6 |
| 4 | Ntatsis, Konstantinos | 0 | GRE | −7N | +20B | +18B | =2N | +?B | +8N | −1B | 4.5 | 22.5 | 22.5 | 10.00 | 1531 | 0.0 |
| 5 | Ntouma, Kalliopi | 0 | GRE | +9B | +2N | −10N | +7B | +6B | −1N | F | 4.0 | 25.0 | 25.0 | 16.00 | 1662 | 0.0 |
| 6 | Vafeiadakis, Michail | 1572 | GRE | +12B | +18N | −1N | +10B | −5N | +14B | −2N | 4.0 | 24.0 | 26.0 | 11.00 | 884 | -14.6 |
| 7 | Kampanis, Apostolos | 1548 | GRE | +4B | −1B | +19N | −5N | −11B | +12N | +16B | 4.0 | 23.0 | 25.0 | 12.00 | 1008 | -7.2 |
| 8 | FIDE 541028651 | 0 | — | +17B | =3N | −2B | F | +?N | −4B | +13N | 3.5 | 20.0 | 20.0 | 8.00 | 1466 | 0.0 |
| 9 | Christodoulou, Konstantinos Chrysovalantis | 1521 | GRE | −5N | F | +12B | +14B | F | +11N | −3B | 3.0 | 24.0 | 24.0 | 9.00 | 957 | -8.0 |
| 10 | Patsaris, Konstantinos | 0 | GRE | F | +?N | +5B | −6N | −3B | −16N | +11B | 3.0 | 18.5 | 18.5 | 7.00 | 866 | -18.8 |
| 11 | Marinopoulos, Nikolaos Sp | 0 | GRE | −2B | +?N | F | +19B | +7N | −9B | −10N | 3.0 | 17.0 | 17.0 | 6.00 | 1418 | 0.0 |
| 12 | FIDE 42184070 | 0 | — | −6N | +?B | −9N | +?B | −14N | −7B | +18N | 3.0 | 16.0 | 16.0 | 2.00 | 748 | 0.0 |
| 13 | FIDE 541022939 | 0 | — | F | +?N | −3B | F | +18N | +?B | −8B | 3.0 | 13.0 | 13.0 | 2.00 | 957 | 0.0 |
| 14 | Stavrinos, Spyridon | 0 | GRE | +?B | F | F | −9N | +12B | −6N | +?B | 3.0 | 10.0 | 10.0 | 3.00 | 1425 | 0.0 |
| 15 | Tzavaras, Giorgo | 0 | GRE | −18N | +21B | −?B | −?N | F | +?B | +?N | 3.0 | 5.0 | 5.0 | 1.00 | 756 | 0.0 |
| 16 | FIDE 541017722 | 0 | — | −3B | =17N | −?B | +21N | F | +10B | −7N | 2.5 | 15.5 | 15.5 | 5.25 | 853 | 0.0 |
| 17 | FIDE 541017757 | 0 | — | −8N | =16B | +?N | F | −2B | −?N | +?B | 2.5 | 14.0 | 14.0 | 1.25 | 767 | 0.0 |
| 18 | FIDE 42187958 | 0 | — | +15B | −6B | −4N | +?N | −13B | −?N | −12B | 2.0 | 17.5 | 17.5 | 3.00 | 765 | 0.0 |
| 19 | Kakaes, Georgios | 0 | GRE | −1N | +?B | −7B | −11N | F | +?B | F | 2.0 | 16.0 | 16.0 | 0.00 | 878 | 0.0 |
| 20 | FIDE 42184304 | 0 | — | F | −4N | F | F | −?B | +?N | +?B | 2.0 | 4.5 | 4.5 | 0.00 | 774 | 0.0 |
| 21 | FIDE 42163706 | 0 | — | F | −15N | −?B | −16B | −?N | F | +?B | 1.0 | 5.5 | 5.5 | 0.00 | 756 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Mentzos, ApostolosGRE+30.85.0 pts · #3
- 2Ntaifas, IoannisGRE+16.46.0 pts · #2
- 3FIDE 421637060.01.0 pts · #13
Top rating losers
- 1Patsaris, KonstantinosGRE-18.83.0 pts · #14
- 2Vafeiadakis, MichailGRE-14.64.0 pts · #17
- 3Marianidis, DimitriosGRE-9.65.0 pts · #5