CChessStats

2025 Winter Tuesday Night Marathon - 2000 and Over Round 4-7

Open SwissStandard

24 players participated in this 4-round tournament, held from 25 Nov 2025 to 16 Dec 2025 in San Francisco, CA, United States. 2 titled players from 2 federations. Top 10 Elo average was 1971, and top seed was Natalia Tsodikova (🇺🇸 USA, WFM, 2143).

Natalia Tsodikova (🇺🇸 USA, WFM, 2143) won with 2.5/4, ahead of Qinhong Chen (2.5) and Daniel Perlov (2.0). Tsodikova won on tie-break after catching the field in the final round.

The biggest upset came in round 3: Daniel Perlov (1746) beat Daniel Sevall (2007), a +261-point gap.

Location
🇺🇸San Francisco, CA, United States
Dates
25 Nov 2025 → 16 Dec 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 4 rounds
Top seed
🇺🇸WFMNatalia Tsodikova2143
Avg top 10
1,971
Participants
24
Titled players · 2
IM×1
WFM×1
Federations · 2 represented
🇺🇸United States of America×23
🇮🇳India×1
Top 3

How it unfolded

Top 6 · 4 rounds

Tight race until R4; 2 players tied at 2.5/4, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 2 at the finish.

Co-leaders
8
3
5
2
1234R1R2R3R4
Tsodikova2.5Chen2.5Sevall2Perlov2Parsons2Smith2
R4 · TIEBREAK CLUSTER

2 players finish on 2.5/4. Tsodikova takes the title on Buchholz Cut1 (6.0).

R3 · HEAD-TO-HEAD · WINNER VS 2ND

WFM Natalia Tsodikova drew with Qinhong Chen (Black).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1WFMNatalia Tsodikova*
½
——
2Qinhong Chen
½
*——
3Daniel Sevall——*
0
4Daniel Perlov——
1
*

Grille américaine

#PlayerEloFedR1R2R3R4PtsBu C1BuSBPerfΔ
1Tsodikova, NataliaWFM2143USA−10B+17N=2N+4B2.56.07.04.251948-17.0
2Chen, Qinhong1876USA=16N=10N=1B+9N2.55.56.54.002104+23.6
3Perlov, Daniel1746USA+11B−9N+6NF2.05.06.03.502062+24.6
4Parsons, Stephen1827USA−13N+22B+16B−1N2.05.05.51.501940+11.0
5Melville, Cailen1751USA−17BF+19N+12B2.03.53.52.501912+12.8
6Sevall, Daniel2007USA+23N+20B−3BF2.02.52.50.501829-22.0
7Smith, Roger1823USA+20N+11BFF2.02.02.02.002604+18.8
8Clemens, Kristian1859USA+21B+24NFF2.00.50.50.502646+19.4
9Mallela, Abhishek1957USAF+3B=15N−2B1.56.06.02.751902-4.2
10Lavi, Eilon1950USA+1N=2BFF1.55.05.03.752203+13.0
11Lewis, Edward1848USA−3N−7N+21B=20N1.54.55.00.751675-19.4
12Naga Abhi Ram Ponnaluri1730USA=14NF+22B−5N1.54.04.01.251768+6.4
13Walder, Michael1859USA+4B=16NFF1.53.03.02.502100+12.4
14Sarmasi, Aron1782USA=12B+21NF−19B1.53.03.01.251773-1.6
15Aadit Bhatia2085INDF+18N=9BF1.52.52.51.752086+0.4
16Winslow, ElliottIM1987USA=2B=13B−4NF1.06.06.02.001729-20.6
17Kulkarni, Neil1757USA+5N−1BFF1.04.54.52.001947+16.0
18Horowitz, Phineas F1830USA+22N−15BFF1.04.04.00.501928+4.6
19Seshadri, Sudarshan1872USAFF−5B+14N1.03.53.51.501767-11.2
20Admassu, Yonathan1760USA−7B−6NF=11B0.55.55.50.751620-9.6
21McCollum, Patrick M1717USA−8N−14B−11N=22N0.55.05.50.251493-38.4
22Rajaram, Raghu1771USA−18B−4N−12N=21B0.54.55.00.251454-29.6
23Casares, Nick1432USA−6BFFF0.02.02.00.001032-1.6
24Atkeson, Christopher Timothy1974USAF−8BFF0.02.02.00.001060-13.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets