CChessStats

2025 National Capital Open

Open SwissStandard

29 players participated in this 5-round tournament, held from 31 Oct 2025 to 02 Nov 2025 in Ottawa, Canada. 9 titled players from 4 federations. Top 10 Elo average was 2182, and top seed was Bator Sambuev (🇨🇦 CAN, GM, 2541).

Zachary Dukic (🇨🇦 CAN, FM, 2334) won with 4.0/5, ahead of Olivier-Kenta Chiku-Ratte (4.0) and Bator Sambuev (3.5). Dukic shared the lead from round 1, winning on tie-break.

The biggest upset came in round 5: Hugo Guillemette (CM, 1755) beat Zachary Dukic (FM, 2334), a +579-point gap.

Location
🇨🇦Ottawa, Canada
Dates
31 Oct 2025 → 02 Nov 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 5 rounds
Top seed
🇨🇦GMBator Sambuev2541
Avg top 10
2,182
Participants
29
Titled players · 9
GM×1
IM×2
FM×2
CM×4
Federations · 4 represented
🇨🇦Canada×26
🇺🇬Uganda×1
🇺🇸United States of America×1
🇩🇪Germany×1
Top 3

How it unfolded

Top 6 · 5 rounds

Tight race until R4; 2 players tied at 4.0/5, decided on Buchholz.

Co-leaders
9
5
2
1
2
1.52.545R1R2R3R4R5
R4–R5 · LEAD HELD

FM Zachary Dukic held the sole lead from R4 through R5 without losing it.

R5 · TIEBREAK CLUSTER

2 players finish on 4.0/5. Dukic takes the title on Buchholz Cut1 (14.5).

R4 · HEAD-TO-HEAD · WINNER VS 2ND

FM Zachary Dukic beat IM Olivier-Kenta Chiku-Ratte (Black).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1FMZachary Dukic*
1
0
2IMOlivier-Kenta Chiku-Ratte
0
*
3Mihnea Voloaca*
4CMHugo Guillemette
1
*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Dukic, ZacharyFM2334CAN+16N+6B+3B+2N5N4.014.516.513.002395+22.0
2Chiku-Ratte, Olivier-KentaIM2477CAN+10B+18N+7B1B+11N4.012.014.010.002278-0.8
3Sambuev, BatorGM2541CAN+19N+24B1N+22B=8N3.511.012.06.502281-6.6
4Voloaca, Mihnea2337CAN12B+14N+18B+10N=7B3.510.512.58.502011-11.2
5Guillemette, HugoCM1755CANF+23N=11B+12N+1B3.510.510.59.252354+26.4
6Zhu, Elber1848CAN+27B1N+26B=7N+16N3.59.510.04.502101+32.4
7Lattafi, Youcef2015CAN+29N+17B2N=6B=4N3.013.013.05.502061+13.0
8Moses, NeilCM1829CANF=20B+19N+9N=3B3.010.510.57.752237+30.8
9Rousskikh, Maxim1774CAN17N+29B+20N8B+19N3.09.09.04.001951-3.8
10Ramesan, Raunak Amit1948CAN2N+28B+15N4B=13N2.512.513.04.252039+30.0
11Nsubuga, HarunaFM0UGAF+21N=5N+13B2B2.512.012.06.252179+1.8
12Di Matteo, Alessio1909CAN+4N13B+24N5B=20N2.511.512.55.502031+19.2
13Azar, Sebastien2015CAN+14B+12N22B11N=10B2.510.012.06.252002-1.2
14Wu, Ting En Ryan1612CAN13N4B+27N=15B+25B2.59.510.02.751865+13.6
15Iordanescu, Victor Nicolae1893CAN=21B=26N10B=14N+17N2.59.09.54.501850-28.0
16Kellar, Ben1955CAN1BF+17N+21N6B2.011.511.54.001852-3.6
17Tan, Shuwen1712CAN+9B7N16B+18N15B2.010.512.55.001849+22.0
18Vu, Huy Minh1836CAN+28N2B4N17B+26B2.010.010.51.001891+16.0
19Xin, StellaCM0USA3B+27N8B+26N9B2.010.010.51.001897-11.2
20Sun, Jonathan1495CANF=8N9B+23N=12B2.010.010.04.251925+20.0
21Melaschenko-Bolger, Brian1434CAN=15N11B+29N16B=24N2.08.08.01.7518910.0
22Kot, EmanuelIM1998CANF+25B+13N3NF2.07.07.03.502235-3.2
23Filion, Samuel1777CANF5B=25N20B+28B1.57.07.01.001777-2.8
24Gordon, DavidCM2204CANF3N12B=25N=21B1.09.09.01.501714-21.8
25Zhu, Edison1729CANF22N=23B=24B14N1.07.07.01.251712-0.8
26Fritzsche, Helmut, Dr.1888GERF=15B6N19B18N0.510.010.01.251594-35.0
27Ishii, Subaru1568CAN6N19B14B=28NF0.58.58.50.2515340.0
28Mahdjoubi, Abdelaziz1913CAN18B10NF=27B23N0.56.56.50.251024-26.0
29Dukkardt, Vladimir1780CAN7B9N21BFF0.08.08.00.001170-22.4

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets