CChessStats

2025 Hamilton Halloween Open

Open SwissStandard

28 players participated in this 5-round tournament, held from 01 Nov 2025 to 02 Nov 2025 in Hamilton, Canada. 3 titled players from 5 federations. Top 10 Elo average was 0.

Pierre J Vachon (🇺🇸 USA, 0) won with 4.5/5, ahead of Oscar Cheung (4.0) and Calix Marchand (4.0). Vachon won solo starting round 4.

Location
🇨🇦Hamilton, Canada
Dates
01 Nov 2025 → 02 Nov 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Avg top 10
0
Participants
28
Titled players · 3
FM×1
CM×1
WCM×1
Federations · 5 represented
🇨🇦Canada×22
🇺🇸United States of America×2
🇮🇳India×1
🇻🇳Vietnam×1
🇵🇭Philippines×1
Top 3

How it unfolded

Top 6 · 5 rounds

Pierre J Vachon led from R4; +0.5-point edge over the runner-up.

Co-leaders
11
4
2
1
1
1.52.545R1R2R3R4R5
R4–R5 · LEAD HELD

Pierre J Vachon held the sole lead from R4 through R5 without losing it.

R5 · HEAD-TO-HEAD · WINNER VS 2ND

Pierre J Vachon drew with Oscar Cheung (Black).

R1–R4 · WIN STREAK

Pierre J Vachon won 4 in a row (R1–R4).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Pierre J Vachon*
½
1
1
2Oscar Cheung
½
*
3Malhar Singh
0
*
4FMCalix Marchand
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Vachon, Pierre J0USA+19N+24B+4N+3B=2N4.513.514.512.502180+53.6
2Cheung, Oscar0CAN+6N=10B+12N+11B=1B4.012.515.011.502083+94.0
3Marchand, CalixFM0CAN+18B+22N+5B1N+8B4.012.013.08.501981-20.8
4Singh, Malhar0CAN+27B+16N1B+14N+5B4.012.012.58.002086+30.6
5Li, Aiden0CAN+23N+13B3N+7B4N3.013.514.56.501885+22.4
6Trofimov-Malyshkin, Valent0CAN2B+15N=7N+21B=11N3.012.013.56.751803-19.6
7Chen, ShuangWCM0CAN+9B=14N=6B5N+25B3.011.512.56.751980+52.8
8Catubig, Florencio0PHI13N+23N+22B+10B3N3.010.011.04.5018980.0
9Dembla, Shabd0CAN7N=27B+20N+18B=12B3.08.59.04.501801-13.6
10Li, Hongyi0CAN+15B=2N11B8N+20B2.512.013.56.001827-0.2
11Sherman, Joshua0CANF+17B+10N2N=6B2.511.511.56.001897+19.2
12Sheth, Rudra0CANF+20N2B+13B=9N2.511.011.05.501774+6.4
13Cheng, Jacob0CAN+8B5N=18B12N+19B2.510.011.55.2516320.0
14Lai, Duc Minh0VIEF=7B+24N4B+16N2.510.010.04.501882-22.8
15Niketic, Vukan0CAN10N6B+28N+22B=17N2.58.58.52.001703+7.6
16Husic, Elvis0CAN+25B4B=21N=19N14B2.09.510.52.501750+20.0
17McDonald-Johnston, Ari0CAN=20B11NF+27N=15B2.07.07.02.501734+7.2
18Patil, Tanishq0CAN3N+28B=13N9N21B1.511.011.01.251093-34.0
19Sama, Chetan Reddy0CAN1B26N+27N=16B13N1.510.010.51.501757+3.6
20Fillmore, Louis0CAN=17N12B9B+28N10N1.510.010.01.001446-58.0
21Belanger, Colton0CANFF=16B6N+18N1.56.56.52.501777+7.6
22Syed, Farhaan0USA+28B3B8N15N23B1.010.510.50.001040-36.4
23Chauhan, Kshitij0CAN5B8BF25N+22N1.08.08.01.001613-31.2
24Param Agarwal0IND+26B1N14BFF1.08.08.01.001900+12.8
25Brajkovic, Nikola0CAN16NFF+23B7N1.06.06.01.001618-13.6
26Terry, JoshuaCM0CAN24N+19BFFF1.02.52.51.501699-16.4
27Li, Allen0CAN4N=9N19B17BF0.510.510.51.501452-48.4
28FIDE 2656361022N18N15B20BF0.06.56.50.008940.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers