CChessStats

2025 Chess4win October 25-26 Markham Open U1900

Open SwissStandard

35 players participated in this 5-round tournament, held from 25 Oct 2025 to 26 Oct 2025 in Markham, ON, Canada. 3 federations represented. Top 10 Elo average was 1673, and top seed was Lyam Katz (πŸ‡¨πŸ‡¦ CAN, 1747).

Shannon Zhao (πŸ‡¨πŸ‡¦ CAN, 1726) won with 5.0/5, ahead of Arianna Yuan (4.0) and Bennett Peng (4.0). Zhao broke clear in the final round.

The biggest upset came in round 4: Sanya Divadalage (1482) beat Rex Tan (1686), a +204-point gap.

Location
πŸ‡¨πŸ‡¦Markham, ON, Canada
Dates
25 Oct 2025 β†’ 26 Oct 2025
Time control
Standard: 75 minutes with 30 seconds increment from move 1
System
Swiss Β· 5 rounds
Top seed
πŸ‡¨πŸ‡¦Lyam Katz1747
Avg top 10
1,673
Participants
35
Federations Β· 3 represented
πŸ‡¨πŸ‡¦CanadaΓ—32
πŸ‡ΉπŸ‡·TurkiyeΓ—1
πŸ‡ΊπŸ‡ΈUnited States of AmericaΓ—1
Top 3
  • πŸ₯‡
    Shannon Zhao
    πŸ‡¨πŸ‡¦CANΒ·1726
    5.0ptsΒ·2318perf+35.7
  • πŸ₯ˆ
    Arianna Yuan
    πŸ‡¨πŸ‡¦CANΒ·1507
    4.0ptsΒ·1862perf+90.8
  • πŸ₯‰
    Bennett Peng
    πŸ‡¨πŸ‡¦CAN
    4.0ptsΒ·1664perf0.0

How it unfolded

Top 6 Β· 5 rounds

Shannon Zhao led from R5; +1.0-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders
16
6
3
2
1
1.52.545R1R2R3R4R5
Zhao5Yuan4Peng4Papadatos4Gowrishankar3.5Divadalage3
R5–R5 Β· LEAD HELD

Shannon Zhao never relinquished the lead after R5; final gap +1.0 over the runner-up.

R4 Β· HEAD-TO-HEAD Β· WINNER VS 2ND

Shannon Zhao beat Arianna Yuan (Black).

WIN STREAKS Β· 3 top finishers

Shannon Zhao 5 wins (R1–R5)Arianna Yuan 3 wins (R1–R3)Bennett Peng 4 wins (R1–R4)

Key matchups Β· top 4

Head-to-head between the four finishers
Player1234
1Shannon Zhao*
1
1
β€”
2Arianna Yuan
0
*β€”
1
3Bennett Peng
0
β€”*β€”
4Stephen Papadatosβ€”
0
β€”*

Grille amΓ©ricaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΞ”
1Zhao, Shannon1726CAN+24B+7N+6B+2N+3B5.014.015.515.502318+35.7
2Yuan, Arianna1507CAN+11N+4B+14Nβˆ’1B+12N4.015.017.512.501862+90.8
3Peng, Bennett0CAN+30B+34N+5B+8Nβˆ’1N4.012.512.57.5016640.0
4Papadatos, Stephen1562CAN+10Bβˆ’2N+21B+22N+6B4.012.014.010.001666+16.4
5Gowrishankar, Nilaanujan1611CAN+32N+19Bβˆ’3N=16B+29N3.510.011.05.751962+52.8
6Jia, Jasper Yunjie1529CAN+15N+25Bβˆ’1N+9Bβˆ’4N3.014.516.07.001490-6.4
7Divadalage, Sanya1482CAN+12Nβˆ’1BF+17N+18B3.013.013.08.001869+79.2
8Huang, Frankie1630CAN+31N=9B+19Nβˆ’3B=16N3.011.512.55.751899+39.2
9Xie, Ethan0CAN+18B=8N=20Bβˆ’6N+21B3.010.512.57.0016350.0
10Kutuzyan, James0CANβˆ’4Nβˆ’15B+31N+19B+32B3.09.510.54.0016240.0
11Desikan, Ajith1645CANβˆ’2B+30NF+24B+14N3.09.09.05.001728+8.0
12Gao, Yiguo1620CANβˆ’7B+35N+34B+20Nβˆ’2B3.09.09.02.001424-31.2
13Donmez, Alphan1422TURβˆ’14Nβˆ’20N+30B+25B+15N3.08.59.55.001574+31.6
14Wang, Alan1562CAN+13B=16Nβˆ’2B+26Nβˆ’11B2.512.514.05.751464-21.2
15Liu, Ziyang Robin0CANβˆ’6B+10N=17B+28Nβˆ’13B2.511.513.05.7514620.0
16Ugodnikov, Arkadiy1628CAN+23N=14BF=5N=8B2.511.011.06.501675+4.4
17Tan, Rex1686CANβˆ’25N+23B=15Nβˆ’7B+26N2.59.010.54.751397-46.0
18Ting, Ryan1676CANβˆ’9N+26B+27N=29Bβˆ’7N2.59.010.53.751396-28.8
19Katz, Lyam1747CAN+21Bβˆ’5Nβˆ’8Bβˆ’10N+31B2.011.512.53.001583-17.2
20Miaco, Trifelino T1645USA=26N+13B=9Nβˆ’12BF2.010.510.55.251521-6.8
21Merse, Leon Noel1589CANβˆ’19N+31Bβˆ’4N+34Bβˆ’9N2.010.010.01.001479-18.0
22Moshopoulos, Angelos0CAN+28N+27BFβˆ’4BF2.07.07.03.0015600.0
23Yang, Andrew1521CANβˆ’16Bβˆ’17N=33B=30N+34N2.07.07.01.001428-18.0
24Divadalage, Sanul1505CANβˆ’1N+32BFβˆ’11N=28B1.510.510.51.751370-25.2
25Li, Alyssa Zhuojing1555CAN+17Bβˆ’6Nβˆ’26Bβˆ’13N=27N1.510.011.53.251421-22.0
26Maulvi, Mohammedfaizal Gulammustu0CAN=20Bβˆ’18N+25Nβˆ’14Bβˆ’17B1.59.511.02.5014770.0
27Rosenberg, Sean0CAN+33Bβˆ’22Nβˆ’18Bβˆ’32N=25B1.57.08.01.7516240.0
28Shen, Yuntian(denis)1556CANβˆ’22B+33NFβˆ’15B=24N1.57.07.01.751789+24.4
29Kotapuri, Ruslan1692CAN+35BFF=18Nβˆ’5B1.56.06.01.251450-25.2
30Ganeshanathan, Sayan1526CANβˆ’3Nβˆ’11Bβˆ’13N=23B=33N1.012.013.01.501365-33.2
31Sahni, Anagh1509CANβˆ’8Bβˆ’21Nβˆ’10B+33Nβˆ’19N1.010.011.01.001460-8.0
32Gao, Joe0CANβˆ’5Bβˆ’24NF+27Bβˆ’10N1.09.59.51.507810.0
33Cao, Allen1650CANβˆ’27Nβˆ’28B=23Nβˆ’31B=30B1.06.07.01.501333-65.6
34Hu, Ethan0CANFβˆ’3Bβˆ’12Nβˆ’21Nβˆ’23B0.011.011.00.007760.0
35FIDE 26810480β€”βˆ’29Nβˆ’12BFFF0.04.54.50.008550.0

Key insights

Biggest movers and upsets β€” the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets
2025 Chess4win October 25-26 Markham Open U1900 β€” Markham, ON, Canada | Chess Tournament Results | ChessStats