CChessStats

2025 Ottawa December Open

Open SwissStandard

26 players participated in this 5-round tournament, held from 05 Dec 2025 to 07 Dec 2025 in Ottawa, Canada. 4 titled players from 3 federations. Top 10 Elo average was 2160, and top seed was Bator Sambuev (🇨🇦 CAN, GM, 2541).

Olivier-Kenta Chiku-Ratte (🇨🇦 CAN, IM, 2477) won with 4.5/5, ahead of Bator Sambuev (4.5) and Victor Nicolae Iordanescu (3.5). Chiku-Ratte shared the lead from round 1, winning on tie-break.

The biggest upset came in round 5: Brian Melaschenko-Bolger (1434) beat Iassen Pelev (2155), a +721-point gap.

Location
🇨🇦Ottawa, Canada
Dates
05 Dec 2025 → 07 Dec 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 5 rounds
Top seed
🇨🇦GMBator Sambuev2541
Avg top 10
2,160
Participants
26
Titled players · 4
GM×1
IM×1
CM×2
Federations · 3 represented
🇨🇦Canada×24
🇺🇸United States of America×1
🇱🇧Lebanon×1
Top 3

How it unfolded

Top 6 · 5 rounds

Tight race until R5; 2 players tied at 4.5/5, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.

Co-leaders
8
3
4
3
2
1.52.545R1R2R3R4R5
Chiku-Ratte4.5Sambuev4.5Iordanescu3.5Clyde3.5Voloaca3Wang3
R5 · TIEBREAK CLUSTER

2 players finish on 4.5/5. Chiku-Ratte takes the title on Buchholz Cut1 (13.5).

R3 · HEAD-TO-HEAD · WINNER VS 2ND

IM Olivier-Kenta Chiku-Ratte drew with GM Bator Sambuev (Black).

R2–R4 · WIN STREAK

Victor Nicolae Iordanescu won 3 in a row (R2–R4).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1IMOlivier-Kenta Chiku-Ratte*
½
—
1
2GMBator Sambuev
½
*
1
—
3Victor Nicolae Iordanescu—
0
*
½
4Jordan Clyde
0
—
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Chiku-Ratte, Olivier-KentaIM2477CAN+12N+16B=2N+4B+5N4.513.515.513.252468+8.2
2Sambuev, BatorGM2541CAN+26B+10N=1B+11N+3B4.513.013.010.752466+2.4
3Iordanescu, Victor Nicolae1893CAN=4N+14B+6N+10B−2N3.513.516.09.752193+86.8
4Clyde, Jordan1971CAN=3B+18N+15B−1N+8B3.513.014.58.252101-1.4
5Voloaca, Mihnea2337CAN+17N+7B−11N+16B−1B3.012.014.07.002088-1.2
6Azar, Sebastien2015CAN+9B=15N−3B+22N=11B3.011.012.06.251823-18.4
7Melaschenko-Bolger, Brian1434CAN+21B−5N+13B−8N+16N3.010.512.06.002045+48.4
8Pomerantz, Daniel2046CAN−15N+17B+25N+7B−4N3.010.511.05.501940-3.2
9Wang, Edison1732CAN−6N+26N=22B+14B=10N3.09.09.04.2518890.0
10Lattafi, Youcef2015CAN+23B−2B+19N−3N=9B2.512.513.54.001941-2.2
11Moses, NeilCM1829CANF+22N+5B−2B=6N2.511.511.55.502165+11.6
12Ramesan, Raunak Amit1948CAN−1B=23N+18B=21N=13B2.510.011.04.001982+9.2
13Zhu, Elber1848CAN=20N=19B−7N+15B=12N2.59.010.54.751826-40.4
14Vu, Huy Minh1836CAN=24B−3N+23B−9N+20B2.59.010.03.001911+8.8
15Zhu, Edison1729CAN+8B=6B−4N−13N=18B2.012.013.55.251922+49.6
16Pelev, Iassen2155CAN+25B−1N+20B−5N−7B2.012.012.52.001908-1.0
17Xin, StellaCM0USA−5B−8N+26B=19N=22B2.08.58.51.251799-21.7
18Lamontagne, Damien1408CANF−4B−12N+24B=15N1.59.09.02.001786-23.6
19Guliyev, Nadir1687CANF=13N−10B=17B=23N1.58.08.02.751818+9.6
20Kellar, Ben1955CAN=13BF−16N+25B−14N1.57.57.51.751790-10.0
21Nassar, Marc2091LBN−7N+24NF=12BF1.56.56.52.251843-5.2
22Scrieciu, Cristian1513CANF−11B=9N−6B=17N1.010.510.52.501696+3.4
23Tan, Shuwen1712CAN−10N=12B−14NF=19B1.09.09.02.001683-26.4
24Thompson, Francis1720CAN=14N−21BF−18N=25B1.06.06.01.501664-13.6
25Stelmach, Noah1777CAN−16NF−8B−20N=24N0.57.57.50.501546-37.2
26Sun, Jonathan1495CAN−2N−9B−17NFF0.09.59.50.001290-24.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets