CChessStats

2025 Seattle Chess Classic - Seirawan U1600

Open SwissStandard

27 players participated in this 6-round tournament, held from 16 Aug 2025 to 17 Aug 2025 in Bellevue, WA, United States. 3 federations represented. Top 10 Elo average was 453, and top seed was Oliver Wakeman (🇺🇸 USA, 1596).

Riaan Babbar (🇺🇸 USA, 0) won with 5.0/6. Babbar clinched sole first place in the final round.

The biggest upset came in round 6: N Inura Sanumitha Wijayarathna (1419) beat Sambuddha Sekhar Das (1565), a +146-point gap.

Location
🇺🇸Bellevue, WA, United States
Dates
16 Aug 2025 → 17 Aug 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 6 rounds
Avg top 10
453
Participants
27
Federations · 3 represented
🇺🇸United States of America×16
FIDE (no federation)×1
🇱🇰Sri Lanka×1
Top 3

How it unfolded

Top 6 · 6 rounds

Riaan Babbar led from R6; +0.5-point edge over the runner-up.

Co-leaders
16
6
2
1
1
1
1.534.56R1R2R3R4R5R6Babbar takes lead
Babbar54.5Wijayarathna4Zhu4Avula44— ex-leaders:Babbarled R6, #13
R6 · LEADER CHANGE17 Aug

Riaan Babbar takes the sole lead (5.0/6).

R1–R4 · WIN STREAK

FIDE 39941256 won 4 in a row (R1–R4).

R4 · LATE SURGE

N Inura Sanumitha Wijayarathna was #13 at R4, climbed to #1 over the final stretch.

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Riaan Babbar*
1
2FIDE 39941256*
1
3N Inura Sanumitha Wijayarathna
0
*
4Aiden Zhu
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6PtsBu C1BuSBPerfΔ
1Babbar, Riaan0USA+?N=6B+3N=10B+?N+4B5.015.515.511.7514390.0
2FIDE 399412560+16B+5N+?B+9N=?BF4.510.510.510.5015660.0
3Wijayarathna, N Inura Sanumitha1419SRI+27N=8N1B+24B=20N+13B4.015.515.57.251749+34.8
4Avula, Guru Harshith0USA+?B9N+?B+?N+11B1N4.012.012.03.5015660.0
5Zhu, Aiden0USA+?N2B+?NF+8B+9N4.011.511.57.0015670.0
6FIDE 399906560+?N=1N+21B=13B=?N=?B4.011.011.07.0015470.0
7FIDE 399897390F+?N+16B+?B+13N?B4.06.06.06.0015470.0
8Cheng, Alan1547USA+14N=3B10N+12B5N+23B3.518.020.010.501419-6.8
9Hetamsaria, Aayan0FID+?N+4B+?N2B=10N5B3.516.016.05.7515480.0
10Zhao, Raymond Rubao0USA+15B=?N+8B=1N=9B?N3.515.015.010.7515670.0
11Roy Chowdhury, Avyaan0USA+?N+?B=13N=?B4N=12B3.510.510.53.2515650.0
12Chaudhuri, Arihant0USA?B+?N+?B8N+15B=11N3.510.010.04.757470.0
13Das, Sambuddha Sekhar1565USA+18B+17N=11B=6N7B3N3.018.521.59.75619-28.0
14FIDE 3998753108B15N+?B+16N+21B?N3.012.512.56.007470.0
15FIDE 39987540010N+14B+23N?B12N+?B3.012.012.05.007280.0
16Arunkumar, Pragit0USA2N+26B7N14B+?N+?B3.011.511.50.0016160.0
17Ma, Ziliang0USA+26N13B19N+?B+?N20B3.09.09.00.007650.0
18Tare, Eevie0USA13N?B+?N+23B19B+?N3.08.08.02.0015810.0
19Avula, Varshith0USA=25B=24N+17B?B+18N?N3.07.57.56.757460.0
20Thanikonda, Kruti0USA=?BFF+?N=3B+17N3.07.07.05.0014190.0
21Li, Edgar0USA+?N?B6N+?B14N+?B3.07.07.00.007280.0
22Zhang, Patrick0USA?N+?B?N+?B?B+?N3.00.00.00.0014320.0
23Ren, Easton0USA+?N?N15B18N+26B8N2.09.59.50.0014380.0
24FIDE 399874000=?N=19BF3N?B?N1.07.07.01.506190.0
25FIDE 399913180=19N?B?N?B?NF0.53.03.01.507960.0
26FIDE 39991300017B16N?BF23N?B0.08.08.00.007960.0
27FIDE 3999125303BFFFFF0.04.04.00.006190.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets