TG MASTER U-1800 SERI II 2025
6 players participated in this 10-round tournament, held from 19 May 2025 to 21 May 2025 in Summarecon Digital Center Tangerang, Indonesia. Top 10 Elo average was 1751, and top seed was Roy Marpaung (🇮🇩 INA, 1788).
Shawn Alamsyah (🇮🇩 INA, 1645) won with 9.0/10, ahead of Roy Marpaung (5.5) and Yadi Sulfianto (4.5). Alamsyah led wire-to-wire.
The biggest upset came in round 10: Shawn Alamsyah (1645) beat Roy Marpaung (1788), a +143-point gap.
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How it unfolded
Top 6 · 10 roundsShawn Alamsyah led from R1 onwards, the title was decided early.
Shawn Alamsyah never relinquished the lead after R1; final gap +3.5 over the runner-up.
Shawn Alamsyah opens a +1.5-point gap over the chasing pack (closest: Roy Marpaung); the title is out of reach before R10.
Shawn Alamsyah 1.5–0.5 against Roy Marpaung (R5 ½-½, R10 1-0) — decisive in 1/2.
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 🇮🇩Alamsyah, Shawn | 1645 | * | 1½ | ½1 | 11 | 11 | 11 | 9.0 | 37.00 | 42.0 | +200.2 | 2138 |
| 2 | 🇮🇩Roy Marpaung | 1788 | ½0 | * | 10 | ½½ | ½½ | 11 | 5.5 | 23.00 | 49.0 | -2.0 | 1779 |
| 3 | 🇮🇩Yadi Sulfianto | 1776 | 0½ | 10 | * | ½½ | ½½ | 01 | 4.5 | 21.00 | 51.0 | -18.4 | 1710 |
| 4 | 🇮🇩Afdimar | 1785 | 00 | ½½ | ½½ | * | ½½ | ½½ | 4.0 | 17.00 | 52.0 | -62.4 | 1672 |
| 5 | 🇮🇩Hakky Madya | 1765 | 00 | ½½ | ½½ | ½½ | * | 10 | 4.0 | 17.00 | 52.0 | -24.4 | 1676 |
| 6 | 🇮🇩Hakim, Abdul | 1746 | 00 | 00 | 01 | ½½ | 10 | * | 3.0 | 12.50 | 54.0 | -67.2 | 1603 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Alamsyah, ShawnINA+200.29.0 pts · #1
- 2Roy MarpaungINA-2.05.5 pts · #2
- 3Yadi SulfiantoINA-18.44.5 pts · #3
- 1Hakim, AbdulINA-67.23.0 pts · #6
- 2AfdimarINA-62.44.0 pts · #4
- 3Hakky MadyaINA-24.44.0 pts · #5
- R10+143 Elo gap
- R9+140 Elo gap
- R4+140 Elo gap