2026 Spring Tuesday Night Marathon - 2000 and Over Round 1-4
Open SwissStandard
26 players participated in this 4-round tournament, held from 03 Mar 2026 to 24 Mar 2026 in San Francisco, CA, United States. 2 titled players. Top 10 Elo average was 1967, and top seed was Natalia Tsodikova (🇺🇸 USA, WFM, 2123).
Jimmy Heiserman (🇺🇸 USA, 2087) won with 4.0/4, ahead of Bradley R Diller (3.0) and Elliott Winslow (3.0). Heiserman broke clear in the final round.
The biggest upset came in round 1: Daniel Perlov (1720) beat Michael Walder (1868), a +148-point gap.
Location
🇺🇸San Francisco, CA, United States
Dates
03 Mar 2026 → 24 Mar 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 4 rounds
Titled players · 2
IM×1
WFM×1
Federations · 1 represented
🇺🇸United States of America×26
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 4 roundsJimmy Heiserman led from R4; +1.0-point edge over the runner-up.
Co-leaders
8
4
2
1
R4–R4 · LEAD HELD
Jimmy Heiserman never relinquished the lead after R4; final gap +1.0 over the runner-up.
WIN STREAKS · 2 top finishers
Jimmy Heiserman 4 wins (R1–R4)Bradley R Diller 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Jimmy Heiserman | * | — | 1 | — |
| 2Phillip Seitzer | — | * | — | ½ |
| 3Bradley R Diller | 0 | — | * | — |
| 4IMElliott Winslow | — | ½ | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Heiserman, Jimmy | 2087 | USA | +25B | +10N | +5B | +2N | 4.0 | 7.5 | 7.5 | 7.50 | 2717 | +22.2 |
| 2 | Diller, Bradley R | 1972 | USA | +17N | +6B | +9N | −1B | 3.0 | 8.5 | 10.0 | 6.00 | 2111 | +14.2 |
| 3 | Winslow, ElliottIM | 2010 | USA | =11B | +26N | =4B | +12N | 3.0 | 7.0 | 7.0 | 4.50 | 2029 | +2.0 |
| 4 | Seitzer, Phillip | 1912 | USA | =15N | +21B | =3N | +9B | 3.0 | 6.5 | 7.5 | 5.25 | 2109 | +20.6 |
| 5 | Chen, Qinhong | 1918 | USA | +19N | +18B | −1N | =11B | 2.5 | 7.5 | 9.0 | 4.00 | 1933 | +1.4 |
| 6 | Seshadri, Sudarshan | 1856 | USA | +20B | −2N | =7B | +17N | 2.5 | 7.0 | 8.0 | 3.75 | 1905 | +10.0 |
| 7 | Hasteer, Divija | 1744 | USA | +24N | −9B | =6N | +16B | 2.5 | 6.0 | 6.0 | 2.75 | 1970 | +47.6 |
| 8 | Tsodikova, NataliaWFM | 2123 | USA | =16N | +15B | F | +10B | 2.5 | 5.0 | 5.0 | 4.25 | 2104 | -0.6 |
| 9 | Cawthon, Jeremy David | 1938 | USA | +14B | +7N | −2B | −4N | 2.0 | 8.5 | 10.5 | 4.50 | 1867 | -7.4 |
| 10 | Zavgorodniy, Andrew | 1874 | USA | +12B | −1B | +16N | −8N | 2.0 | 8.5 | 10.0 | 3.50 | 1952 | +15.2 |
| 11 | Kulkarni, Neil | 1804 | USA | =3N | F | +23B | =5N | 2.0 | 6.0 | 6.0 | 3.25 | 2051 | +39.2 |
| 12 | Melville, Cailen | 1765 | USA | −10N | +25N | +22B | −3B | 2.0 | 6.0 | 6.0 | 1.00 | 1914 | +15.8 |
| 13 | McCollum, Patrick M | 1685 | USA | =21N | −16B | =15N | +20B | 2.0 | 4.0 | 5.0 | 2.25 | 1820 | +14.2 |
| 14 | Horowitz, Phineas F | 1840 | USA | −9N | +24B | +18N | F | 2.0 | 3.5 | 3.5 | 1.50 | 1968 | +10.2 |
| 15 | Rigel, Marlon | 1783 | USA | =4B | −8N | =13B | =23N | 1.5 | 7.5 | 8.0 | 2.75 | 1805 | +0.2 |
| 16 | Viadiu-Ilarraza, Hector | 1835 | USA | =8B | +13N | −10B | −7N | 1.5 | 7.0 | 9.0 | 3.25 | 1770 | -8.6 |
| 17 | Lewis, Edward | 1792 | USA | −2B | =20N | +26B | −6B | 1.5 | 6.5 | 6.5 | 0.50 | 1769 | -3.0 |
| 18 | Perlov, Daniel | 1720 | USA | +22B | −5N | −14B | =19N | 1.5 | 6.0 | 7.0 | 1.75 | 1754 | +3.0 |
| 19 | Wang, Chase | 1739 | USA | −5B | −22N | +24N | =18B | 1.5 | 5.0 | 5.0 | 0.75 | 1757 | +2.0 |
| 20 | Sevall, Daniel | 1732 | USA | −6N | =17B | =21N | −13N | 1.0 | 6.0 | 7.0 | 1.25 | 1623 | -11.2 |
| 21 | Dees, Calvin Django | 1931 | USA | =13B | −4N | =20B | F | 1.0 | 6.0 | 6.0 | 1.50 | 1651 | -44.0 |
| 22 | Walder, Michael | 1868 | USA | −18N | +19B | −12N | F | 1.0 | 5.0 | 5.0 | 1.50 | 1616 | -20.2 |
| 23 | Powers, Christopher | 1849 | USA | F | F | −11N | =15B | 0.5 | 3.5 | 3.5 | 0.75 | 1601 | -13.0 |
| 24 | Parsons, Stephen | 1871 | USA | −7B | −14N | −19B | F | 0.0 | 6.0 | 6.0 | 0.00 | 974 | -37.8 |
| 25 | Clemens, Kristian | 1904 | USA | −1N | −12B | F | F | 0.0 | 6.0 | 6.0 | 0.00 | 1126 | -19.0 |
| 26 | Steger, Eric | 1863 | USA | F | −3B | −17N | F | 0.0 | 4.5 | 4.5 | 0.00 | 1101 | -18.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Hasteer, DivijaUSA+47.62.5 pts · #6
- 2Kulkarni, NeilUSA+39.22.0 pts · #11
- 3Heiserman, JimmyUSA+22.24.0 pts · #1
Top rating losers
- 1Dees, Calvin DjangoUSA-44.01.0 pts · #20
- 2Parsons, StephenUSA-37.80.0 pts · #24
- 3Walder, MichaelUSA-20.21.0 pts · #21
Biggest upsets
- R1+148 Elo gap
- R2+139 Elo gap
- R3+132 Elo gap