2025 Ontario Open Chess Championships O2000
SwissStandard
55 players participated in this 6-round tournament, held from 17 May 2025 to 19 May 2025 in Brantford, Ontario, Canada. 17 titled players from 4 federations. Top 10 Elo average was 2303, and top seed was Razvan Preotu (🇨🇦 CAN, GM, 2473).
Razvan Preotu (🇨🇦 CAN, GM, 2473) won with 5.0/6, ahead of Anthony Atanasov (5.0) and Zachary Dukic (5.0). Preotu shared the lead from round 5, winning on tie-break.
The biggest upset came in round 1: Ian Loadman (1907) beat Zachary Dukic (FM, 2182), a +275-point gap.
Location
🇨🇦Brantford, Ontario, Canada
Dates
17 May 2025 → 19 May 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 6 rounds
Titled players · 17
GM×1
IM×4
FM×6
CM×5
WFM×1
Federations · 4 represented
🇨🇦Canada×52
🇺🇸United States of America×1
🇺🇦Ukraine×1
🇻🇳Vietnam×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsTight race until R6; 3 players tied at 5.0/6, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 3 at the finish.
Co-leaders
20
7
1
2
7
3
R6 · TIEBREAK CLUSTER
3 players finish on 5.0/6. Preotu takes the title on Buchholz Cut1 (19.5).
WIN STREAKS · 2 top finishers
FM Zachary Dukic 5 wins (R2–R6)IM Anthony Atanasov 3 wins (R4–R6)
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Preotu, RazvanGM | 2473 | CAN | +18N | +12B | =13N | =8B | +7N | +10B | 5.0 | 19.5 | 23.0 | 19.25 | 2460 | +0.5 |
| 2 | Atanasov, AnthonyIM | 2402 | CAN | +51N | =7B | =20N | +15N | +9B | +8B | 5.0 | 18.5 | 19.5 | 16.00 | 2401 | +1.5 |
| 3 | Dukic, ZacharyFM | 2182 | CAN | −41B | +37N | +23B | +22N | +11B | +13B | 5.0 | 16.0 | 18.0 | 16.00 | 2245 | +11.0 |
| 4 | Liang, JasonIM | 2378 | USA | +30B | =11N | +14B | +13B | =8N | =5N | 4.5 | 19.5 | 22.0 | 15.75 | 2377 | +1.4 |
| 5 | Plotkin, MarkIM | 2350 | CAN | +39N | +15B | =9N | =7B | +20N | =4B | 4.5 | 19.0 | 21.5 | 15.25 | 2314 | -0.9 |
| 6 | Moses, NeilCM | 2122 | CAN | =47N | +40B | −7N | +42B | +16N | +17B | 4.5 | 15.0 | 16.5 | 11.75 | 2119 | +6.8 |
| 7 | Joseph Benher, Savio | 2115 | CAN | +26B | =2N | +6B | =5N | −1B | +25N | 4.0 | 22.0 | 25.0 | 15.25 | 2300 | +28.4 |
| 8 | Vettese, NicholasIM | 2369 | CAN | +43B | +53N | +17B | =1N | =4B | −2N | 4.0 | 19.5 | 20.5 | 10.75 | 2342 | +0.8 |
| 9 | Khaledi, OmidFM | 2228 | CAN | +46B | +36N | =5B | =10B | −2N | +20B | 4.0 | 19.0 | 20.5 | 11.25 | 2283 | +10.8 |
| 10 | Jaferian, KooshaFM | 2292 | CAN | +23B | =22N | +24B | =9N | +14B | −1N | 4.0 | 18.5 | 21.5 | 13.00 | 2224 | -5.8 |
| 11 | England, MaxCM | 2156 | CAN | +29N | =4B | =21N | +28B | −3N | +40B | 4.0 | 17.5 | 19.5 | 10.75 | 2080 | -5.4 |
| 12 | Lalonde, Olivier | 2089 | CAN | +32B | −1N | +34B | =44N | +27B | =14N | 4.0 | 16.0 | 17.5 | 10.00 | 2128 | +7.0 |
| 13 | Mao, Fengxi | 2200 | CAN | +34N | +16B | =1B | −4N | +22B | −3N | 3.5 | 21.0 | 23.5 | 11.50 | 2204 | +2.4 |
| 14 | Kapra, Jerjis | 2048 | CAN | +44N | +28B | −4N | +21B | −10N | =12B | 3.5 | 18.0 | 19.5 | 9.00 | 2090 | +7.2 |
| 15 | Huang, Patrick | 2019 | CAN | +50B | −5N | +41N | −2B | =21N | +44B | 3.5 | 16.0 | 17.0 | 6.00 | 2071 | +7.0 |
| 16 | Lu, TonyFM | 1998 | CAN | +45B | −13N | +50B | =17N | −6B | +30N | 3.5 | 15.5 | 16.5 | 6.75 | 2036 | +15.2 |
| 17 | Li, WilliamCM | 2105 | CAN | +52N | +41B | −8N | =16B | +44B | −6N | 3.5 | 15.5 | 16.5 | 6.25 | 2077 | -3.6 |
| 18 | Deepak, LaksshanaWFM | 0 | CAN | −1B | +32N | =31B | −27N | +46B | +33N | 3.5 | 15.0 | 16.5 | 7.75 | 1974 | +30.4 |
| 19 | Mutyalapati, Modith Aaroh | 1906 | CAN | =27B | −21N | +40N | =29B | =31N | +28B | 3.5 | 13.0 | 15.0 | 8.25 | 1850 | -16.8 |
| 20 | Xu, Leon | 2037 | CAN | =54N | +33B | =2B | +25N | −5B | −9N | 3.0 | 19.0 | 19.5 | 8.25 | 2076 | +8.4 |
| 21 | Huang, Patrick L. | 1823 | CAN | =49N | +19B | =11B | −14N | =15B | =22N | 3.0 | 17.5 | 19.0 | 9.50 | 2034 | +31.0 |
| 22 | Kola, Venkat Karthikeya ReddyCM | 1950 | CAN | +48N | =10B | +49N | −3B | −13N | =21B | 3.0 | 17.0 | 18.5 | 6.50 | 2064 | +32.0 |
| 23 | Zhao, Jifan | 1835 | CAN | −10N | +48B | −3N | =33B | +50N | =24N | 3.0 | 16.0 | 17.0 | 5.25 | 1947 | +28.0 |
| 24 | Trofimov-Malyshkin, Valent | 2001 | CAN | =33N | +54B | −10N | =31B | =29N | =23B | 3.0 | 14.5 | 15.0 | 5.75 | 1885 | -18.8 |
| 25 | Filipovich, David | 1901 | CAN | −53B | +43N | +38N | −20B | +35N | −7B | 3.0 | 13.5 | 14.5 | 6.50 | 1954 | +8.2 |
| 26 | Lin, Austin | 1800 | CAN | −7N | −51B | =39N | =43B | +52B | +27N | 3.0 | 11.5 | 12.5 | 5.50 | 1893 | +27.6 |
| 27 | Yin, Zeming | 1861 | CAN | =19N | =38B | =35N | +18B | −12N | −26B | 2.5 | 16.5 | 19.0 | 7.75 | 1853 | -4.8 |
| 28 | Pan, Julian | 1764 | CAN | +55B | −14N | +36B | −11N | =30B | −19N | 2.5 | 16.0 | 16.5 | 4.25 | 1915 | +40.4 |
| 29 | Deshpande,SarthakCM | 1823 | CAN | −11B | =30N | +47B | =19N | =24B | −38N | 2.5 | 15.5 | 17.0 | 6.00 | 1896 | +20.0 |
| 30 | Malakar, SaarthakFM | 1901 | CAN | −4N | =29B | +54N | =35B | =28N | −16B | 2.5 | 15.5 | 16.0 | 4.25 | 1879 | -13.6 |
| 31 | Russell, Wesley | 1789 | CAN | =38N | =35B | =18N | =24N | =19B | F | 2.5 | 15.0 | 15.0 | 7.50 | 1918 | +34.0 |
| 32 | Xu, Ryan (Zhuoyuan) | 1866 | CAN | −12N | −18B | +43B | −36N | +51N | =35B | 2.5 | 14.0 | 15.0 | 3.75 | 1850 | -7.2 |
| 33 | Lee, Daniel Joshua | 1767 | CAN | =24B | −20N | =55B | =23N | +47N | −18B | 2.5 | 14.0 | 14.5 | 4.75 | 1861 | +25.5 |
| 34 | Chen, Larry Zhou | 1901 | CAN | −13B | +45N | −12N | −40B | =37N | +50B | 2.5 | 13.5 | 14.5 | 3.75 | 1812 | -32.0 |
| 35 | Ivanchuk, Serghii | 1924 | UKR | =37B | =31N | =27B | =30N | −25B | =32N | 2.5 | 13.0 | 15.5 | 6.25 | 1778 | -24.0 |
| 36 | Wang, Nathan Zian | 1920 | CAN | +42N | −9B | −28N | +32B | −40N | =48B | 2.5 | 13.0 | 14.5 | 5.25 | 1788 | -45.2 |
| 37 | Tseng, Bradley | 1693 | CAN | =35N | −3B | =46N | F | =34B | +43N | 2.5 | 13.0 | 13.0 | 4.75 | 1931 | +56.8 |
| 38 | Zhang, Daniel | 1884 | CAN | =31B | =27N | −25B | =45N | F | +29B | 2.5 | 12.0 | 12.0 | 5.75 | 1836 | -13.2 |
| 39 | Wu, Nolan | 1873 | CAN | −5B | −50N | =26B | +54N | +45B | F | 2.5 | 10.5 | 10.5 | 3.50 | 1884 | -2.4 |
| 40 | Huang, Eric | 1700 | CAN | F | −6N | −19B | +34N | +36B | −11N | 2.0 | 17.0 | 17.0 | 5.00 | 1913 | +46.0 |
| 41 | Loadman, Ian | 1907 | CAN | +3N | −17N | −15B | F | +48B | F | 2.0 | 13.5 | 13.5 | 6.50 | 2017 | +11.0 |
| 42 | Huang, Justin | 1751 | CAN | −36B | +52B | +51N | −6N | F | F | 2.0 | 9.0 | 9.0 | 2.00 | 1941 | +36.8 |
| 43 | Pitre, Lucas | 1789 | CAN | −8N | −25B | −32N | =26N | +55B | −37B | 1.5 | 15.0 | 15.5 | 2.00 | 1698 | -15.6 |
| 44 | Hong, Zihan | 1868 | CAN | −14B | +55N | F | =12B | −17N | −15N | 1.5 | 15.0 | 15.0 | 2.50 | 1880 | +1.6 |
| 45 | Li, Triston | 1809 | CAN | −16N | −34B | +52N | =38B | −39N | −46N | 1.5 | 12.5 | 13.5 | 2.25 | 1717 | -26.8 |
| 46 | Jung, Hans RudolfFM | 1948 | CAN | −9N | F | =37B | F | −18N | +45B | 1.5 | 11.5 | 11.5 | 2.75 | 1813 | -15.4 |
| 47 | Murali, Dhruv | 1868 | CAN | =6B | −49B | −29N | +55N | −33B | F | 1.5 | 11.5 | 11.5 | 2.75 | 1798 | -21.2 |
| 48 | Nguyen, Minh Thong | 1763 | VIE | −22B | −23N | F | +51B | −41N | =36N | 1.5 | 11.5 | 11.5 | 2.25 | 1746 | -2.4 |
| 49 | Dhaliwal, Jaipreet Singh | 2123 | CAN | =21B | +47N | −22B | F | F | F | 1.5 | 7.5 | 7.5 | 3.00 | 1880 | -36.0 |
| 50 | Belanger, Colton | 0 | CAN | −15N | +39B | −16N | F | −23B | −34N | 1.0 | 15.0 | 15.0 | 2.50 | 1685 | -11.6 |
| 51 | Li, Hongyi | 1865 | CAN | −2B | +26N | −42B | −48N | −32B | −52N | 1.0 | 14.0 | 15.0 | 3.00 | 1610 | -39.6 |
| 52 | Harms, Reece | 1856 | CAN | −17B | −42N | −45B | F | −26N | +51B | 1.0 | 11.0 | 11.0 | 1.00 | 1626 | -29.4 |
| 53 | Windram, James | 1972 | CAN | +25N | −8B | F | F | F | F | 1.0 | 7.0 | 7.0 | 3.00 | 2135 | +6.4 |
| 54 | Achyuth, Akshaj | 1804 | CAN | =20B | −24N | −30B | −39B | F | F | 0.5 | 11.0 | 11.0 | 1.50 | 1632 | -28.8 |
| 55 | Maulucci, Anthony | 1897 | CAN | −28N | −44B | =33N | −47B | −43N | F | 0.5 | 9.5 | 9.5 | 1.25 | 1445 | -51.8 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Tseng, BradleyCAN+56.82.5 pts · #34
- 2Huang, EricCAN+46.02.0 pts · #40
- 3Pan, JulianCAN+40.42.5 pts · #38
Top rating losers
- 1Maulucci, AnthonyCAN-51.80.5 pts · #55
- 2Wang, Nathan ZianCAN-45.22.5 pts · #39
- 3Li, HongyiCAN-39.61.0 pts · #50
Biggest upsets
- R1+275 Elo gap
- R5+220 Elo gap
- R4+201 Elo gap