CChessStats

91st Southwest Open

SwissStandard

10 players participated in this 9-round tournament, held from 28 Aug 2025 to 01 Sept 2025 in McAllen, TX, United States. 9 titled players from 8 federations. Top 10 Elo average was 2306, and top seed was Jose Gabriel Cardoso Cardoso (🇨🇴 COL, GM, 2530).

Samant Aditya S (🇮🇳 IND, GM, 2517) won with 7.5/9, ahead of Balaji Daggupati (6.5) and Jose Gabriel Cardoso Cardoso (6.0). S shared the lead from round 6 and broke clear in the final round.

The biggest upset came in round 2: Emerson Aurelius Johnson (1794) beat Ann Chumpitaz (WIM, 2270), a +476-point gap.

Location
🇺🇸McAllen, TX, United States
Dates
28 Aug 2025 → 01 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇨🇴GMJose Gabriel Cardoso Cardoso2530
Avg top 10
2,306
Participants
10
Titled players · 9
GM×4
IM×1
FM×2
WGM×1
WIM×1
Federations · 8 represented
🇺🇸United States of America×3
FIDE (no federation)×1
🇵🇪Peru×1
🇮🇳India×1
🇵🇱Poland×1
🇲🇽Mexico×1
🇨🇴Colombia×1
🇨🇦Canada×1
Top 3

How it unfolded

Top 6 · 9 rounds

GM Samant Aditya S led from R9; +1.0-point edge over the runner-up.

Co-leaders
4
1
2
1
1
2
2
2
1
2.54.579R1R2R3R4R5R6R7R8R9Samant Aditya takes lead
Samant Aditya7.5Daggupati6.5Cardoso Cardoso6Rodrigue-Lemieux6Fus4.5Paramzina4
R9 · LEADER CHANGE01 Sept

GM Samant Aditya S takes the sole lead (7.5/9).

R5 · HEAD-TO-HEAD · WINNER VS 2ND

GM Samant Aditya S drew with GM Balaji Daggupati (White).

R6–R9 · WIN STREAK

GM Samant Aditya S won 4 in a row (R6–R9).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1GMSamant Aditya S*
½
½
½
2GMBalaji Daggupati
½
*
1
1
3GMJose Gabriel Cardoso Cardoso
½
0
*
½
4GMShawn Rodrigue-Lemieux
½
0
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Samant Aditya SGM2517IND+8N=4B=3N+5B=2B+10N+7N+6B+9B7.534.035.526.252600+10.7
2Daggupati, BalajiGM2453USA+10N+3B=5N+4B=1N=7B+9N+8B−6N6.535.036.525.002486+7.1
3Cardoso Cardoso, Jose GabrielGM2530COL+7B−2N=1B+9N=4B=8N=6B+5N+10N6.035.537.020.752454-5.6
4Rodrigue-Lemieux, ShawnGM2516CAN+6B=1N+9B−2N=3N+5B+8N+10BF6.034.034.020.752517+2.3
5Fus, JakubIM2442POL=9B+7N=2B−1N=6B−4N+10B−3B+8N4.537.038.512.752319-11.9
6Paramzina, AnastasyaWGM2133FID−4N+10B−8N−7B=5N+9B=3N−1N+2B4.037.539.015.252283+28.8
7Amburgy, RyanFM2363USA−3N−5B=10N+6N+8B=2N−1BFF3.032.032.010.002291-12.6
8Chumpitaz, AnnWIM2270PER−1B−9N+6B=10N−7N=3B−4B−2N−5B2.039.541.07.752099-37.0
9Johnson, Emerson Aurelius1794USA=5N+8B−4N−3B=10B−6N−2BF−1N2.038.038.05.001974+48.4
10Lares Flores, Manuel de JesusFM2042MEX−2B−6N=7B=8B=9N−1B−5N−4N−3B1.539.541.53.502035-8.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets