2025 Chess4win December Markham Open U1900

Open SwissStandard

25 players participated in this 5-round tournament, held from 06 Dec 2025 to 07 Dec 2025 in Markham, ON, Canada. 3 federations represented. Top 10 Elo average was 1666, and top seed was Lyam Katz (🇨🇦 CAN, 1734).

Phoenix Cheung (🇨🇦 CAN, 1630) won with 4.5/5, ahead of Alan Wang (4.0) and Lyam Katz (3.5). Cheung broke clear in the final round.

The biggest upset came in round 5: Alan Wang (1547) beat Dharsan Satish Alwar (1727), a +180-point gap.

Location

🇨🇦Markham, ON, Canada

Dates

06 Dec 2025 → 07 Dec 2025

Time control

Standard: 75 minutes with 30 seconds increment from move 1

System

Swiss · 5 rounds

Top seed

🇨🇦Lyam Katz1734

Avg top 10

1,666

Participants

Federations · 3 represented

🇨🇦Canada×22

🇺🇸United States of America×2

FIDE (no federation)×1

Top 3

🥇
Phoenix Cheung
🇨🇦CAN·1630
4.5pts·1932perf+52.8
🥈
Alan Wang
🇨🇦CAN·1547
4.0pts·1893perf+72.0
🥉
Lyam Katz
🇨🇦CAN·1734
3.5pts·1790perf+7.6

How it unfolded

Top 6 · 5 rounds

Phoenix Cheung led from R3; +0.5-point edge over the runner-up.

Co-leaders

Cheung4.5Wang4Feng3.5Katz3.5Ting3.5Yuan3.5

R3–R5 · LEAD HELD

Phoenix Cheung held the sole lead from R3 through R5 without losing it.

R1–R3 · WIN STREAK

Phoenix Cheung won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Phoenix Cheung	*	—	1	—
2Alan Wang	—	*	—	½
3Warren Feng	0	—	*	—
4Lyam Katz	—	½	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	Pts	Bu C1	Bu	SB	Perf	Δ
1	Cheung, Phoenix	1630	CAN	+21B	+10N	+19N	=7B	+4N	4.5	10.0	11.0	9.50	1932	+52.8
2	Wang, Alan	1547	CAN	=3B	+11N	=5B	+15N	+7N	4.0	12.0	14.0	10.50	1893	+72.0
3	Katz, Lyam	1734	CAN	=2N	+9B	=7N	+10B	=5N	3.5	13.5	16.0	10.75	1790	+7.6
4	Feng, Warren	0	CAN	+14N	=5N	+6B	+17N	−1B	3.5	13.5	15.5	9.25	1677	0.0
5	Ting, Ryan	1683	CAN	+18N	=4B	=2N	+19B	=3B	3.5	12.5	13.5	8.00	1770	+18.0
6	Yuan, Arianna	1598	CAN	=9N	+13B	−4N	+11B	+12N	3.5	10.5	12.5	7.50	1833	+24.8
7	Satish Alwar, Dharsan	1727	CAN	+16B	+8N	=3B	=1N	−2B	3.0	15.0	17.0	9.00	1609	-24.4
8	Jia, Jasper Yunjie	1523	CAN	+12N	−7B	=11N	+16B	=10N	3.0	9.5	11.5	6.25	1675	+24.0
9	Tan, Rex	1613	CAN	=6B	−3N	=23B	+22N	+20B	3.0	9.0	9.5	4.00	1614	0.0
10	Muminov, Diyor	1635	CAN	+24N	−1B	+18B	−3N	=8B	2.5	12.5	13.0	3.50	1504	-29.2
11	Swain, Harshil	0	CAN	+23N	−2B	=8B	−6N	=24N	2.0	11.0	11.5	2.25	1493	0.0
12	Roque, Alexa	1666	CAN	−8B	F	+13N	+25N	−6B	2.0	9.0	9.0	2.50	1391	-43.6
13	Abarca, Jaime	0	USA	F	−6N	−12B	+23N	+18B	2.0	7.5	7.5	2.00	1598	0.0
14	Ugodnikov, Arkadiy	1630	CAN	−4B	=20B	F	=18N	+19N	2.0	7.0	7.0	2.25	1707	+3.6
15	Kotapuri, Ruslan	1658	CAN	+22N	−19B	+20N	−2B	F	2.0	7.0	7.0	2.00	1399	-41.2
16	Io, William	0	CAN	−7N	+24B	F	−8N	+25B	2.0	7.0	7.0	1.00	1434	0.0
17	Miaco, Trifelino T	1645	USA	=20N	=25B	+21N	−4B	F	2.0	6.0	6.0	1.75	1644	-0.2
18	Sahni, Anagh	1477	CAN	−5B	+23B	−10N	=14B	−13N	1.5	10.0	10.5	1.50	1563	+16.4
19	Garikapati, Tejas Avyan	1552	CAN	F	+15N	−1B	−5N	−14B	1.0	12.0	12.0	2.00	1457	-18.4
20	Raja, Aarav	0	CAN	=17B	=14N	−15B	F	−9N	1.0	9.0	10.0	2.00	1444	0.0
21	Chahar, Yugansh	1473	FID	−1N	+22B	−17B	F	F	1.0	8.5	8.5	1.00	1459	-2.4
22	Dolderman, Clara	1478	CAN	−15B	−21N	+24B	−9B	F	1.0	6.5	6.5	0.50	781	-21.4
23	Gowrishankar, Nilaanujan	1651	CAN	−11B	−18N	=9N	−13B	F	0.5	8.5	8.5	1.50	1352	-31.2
24	Gao, Joe	0	CAN	−10B	−16N	−22N	F	=11B	0.5	7.5	7.5	1.00	755	0.0
25	Manikandan Reddia Gowder, Kavira	1428	CAN	F	=17N	F	−12B	−16N	0.5	6.0	6.0	1.00	1463	+3.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Wang, AlanCAN
+72.0
4.0 pts · #4
2Cheung, PhoenixCAN
+52.8
4.5 pts · #3
3Yuan, AriannaCAN
+24.8
3.5 pts · #15

Top rating losers

1Roque, AlexaCAN
-43.6
2.0 pts · #16
2Kotapuri, RuslanCAN
-41.2
2.0 pts · #17
3Gowrishankar, NilaanujanCAN
-31.2
0.5 pts · #23

Biggest upsets

R5+180 Elo gap
Wang, Alan1547 beat Satish Alwar, Dharsan1727
R2+174 Elo gap
Sahni, Anagh1477 beat Gowrishankar, Nilaanujan1651
R1+143 Elo gap
Jia, Jasper Yunjie1523 beat Roque, Alexa1666