Cluj Chess Marathon Open - 11th ed.
15 players participated in this 7-round tournament, held from 30 Jan 2026 to 01 Feb 2026 in Cluj-Napoca, Romania. 1 titled players. Top 10 Elo average was 1777, and top seed was Petru-Sebastian Ursan (🇷🇴 ROU, CM, 2195).
Petru-Sebastian Ursan (🇷🇴 ROU, CM, 2195) won with 7.0/7, ahead of Horatiu Bran (4.5) and Alin-Sebastian Tat (4.0). Ursan won solo starting round 3.
The biggest upset came in round 5: Luca Donici-Maier (1654) beat Janos Helmer (2019), a +365-point gap.
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How it unfolded
Top 6 · 7 roundsCM Petru-Sebastian Ursan led from R3; +2.5-point edge over the runner-up.
CM Petru-Sebastian Ursan never relinquished the lead after R3; final gap +2.5 over the runner-up.
CM Petru-Sebastian Ursan beat Horatiu Bran (White).
CM Petru-Sebastian Ursan won 7 in a row (R1–R7).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1CMPetru-Sebastian Ursan | * | 1 | 1 | 1 |
| 2Horatiu Bran | 0 | * | 0 | — |
| 3Marian-David Voinescu | 0 | 1 | * | ½ |
| 4Janos Helmer | 0 | — | ½ | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ursan, Petru-SebastianCM | 2195 | ROU | +2B | +12N | +4B | +6N | +5N | +3B | +7N | 7.0 | 23.5 | 25.5 | 25.50 | 2641 | +16.4 |
| 2 | Bran, Horatiu | 1657 | ROU | −1N | +8B | +12N | =3B | +9N | +7B | −5N | 4.5 | 24.0 | 26.0 | 13.00 | 1835 | +30.8 |
| 3 | Tat, Alin-Sebastian | 1683 | ROU | −12B | +15N | +10B | =2N | +6B | −1N | =4B | 4.0 | 24.0 | 24.0 | 10.75 | 1777 | +11.2 |
| 4 | Helmer, Janos | 2019 | ROU | +9N | +11B | −1N | =5B | −7N | +10B | =3N | 4.0 | 23.5 | 26.0 | 12.00 | 1811 | -29.2 |
| 5 | Voinescu, Marian-David | 1893 | ROU | F | +7B | +14N | =4N | −1B | =6N | +2B | 4.0 | 23.0 | 23.0 | 12.00 | 1904 | +8.4 |
| 6 | Guo, Aris-Dian | 1683 | ROU | +8N | =14B | +11N | −1B | −3N | =5B | +13B | 4.0 | 22.5 | 23.0 | 9.75 | 1767 | +27.6 |
| 7 | Donici-Maier, Luca | 1654 | ROU | F | −5N | +15B | +14N | +4B | −2N | −1B | 3.0 | 20.0 | 20.0 | 4.50 | 1736 | +19.6 |
| 8 | Tamas, Alexandru-Marius | 1578 | ROU | −6B | −2N | −9N | F | +12B | +11B | +10N | 3.0 | 18.5 | 18.5 | 7.00 | 1646 | +12.8 |
| 9 | Fantana, Daniel-Vasile | 1655 | ROU | −4B | −10N | +8B | +15N | −2B | F | +14N | 3.0 | 14.5 | 14.5 | 3.50 | 1580 | -12.0 |
| 10 | Bindea, Robert-Alexandru | 1567 | ROU | −11N | +9B | −3N | +12B | =13B | −4N | −8B | 2.5 | 18.5 | 20.5 | 6.00 | 1592 | +1.8 |
| 11 | Hale, Eduard | 1660 | ROU | +10B | −4N | −6B | =13N | +14B | −8N | −12N | 2.5 | 17.5 | 18.0 | 4.00 | 1557 | -44.0 |
| 12 | Ros, Octav-Paul | 1648 | ROU | +3N | −1B | −2B | −10N | −8N | F | +11B | 2.0 | 23.5 | 23.5 | 6.50 | 1573 | -14.2 |
| 13 | Paraschiv, Andrei-Cristian | 1674 | ROU | F | F | F | =11B | =10N | +14B | −6N | 2.0 | 9.5 | 9.5 | 3.00 | 1590 | -9.0 |
| 14 | Sandea, Dorin-Gheorghe | 1459 | ROU | F | =6N | −5B | −7B | −11N | −13N | −9B | 0.5 | 18.5 | 18.5 | 2.00 | 1290 | -14.4 |
| 15 | FIDE 42247969 | 0 | — | F | −3B | −7N | −9B | F | F | F | 0.0 | 10.0 | 10.0 | 0.00 | 854 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Bran, HoratiuROU+30.84.5 pts · #2
- 2Guo, Aris-DianROU+27.64.0 pts · #5
- 3Donici-Maier, LucaROU+19.63.0 pts · #11
- 1Hale, EduardROU-44.02.5 pts · #8
- 2Helmer, JanosROU-29.24.0 pts · #4
- 3Sandea, Dorin-GheorgheROU-14.40.5 pts · #14
- R5+365 Elo gap