Format
JR
Jiroajvanichakorn, Rathasart
🇹🇭FIDE 6208924· Male· Thailand· Born in 2009
Follow Rathasart JiroajvanichakornTrack his monthly FIDE ratings, games, tournaments and more.
Rathasart Jiroajvanichakorn, a 17-year-old player, is rated 1978 — his current career high and ranked 12th among THA players. He is progressing steadily with +72 Elo over the past 12 months. 49 rated games in the past year (≈27/year long-term). Recent standard appearances include Thailand Final Qualifying Round for 46th Olympiad - Open, 49th Thailand Chess Championship 2026 - Open, and TCA x Big Rook Chinese Year Chess 2026 - Standard Open. Also played 7 rapid (including Red Knight Chess Cafe Anniversary Rapid Championship 2025) and 8 blitz events (including Red Knight Chess Cafe Anniversary Blitz Championship 2025) recently. He reached #11 nationally in Jun 2025.
At junior level, he reached #1, #1, #2, #8 and #8 nationally in U18, U16, U14, U12 and U10.
Current rating
1978
Standard
Rpd1863·Blz1906
All-time high
1978
at best
Jun 2026 · age 17
Jun 2026 · age 17
Activity
44
games / yr avg. · ≈4/mo
41 past 12 mo · ≈3/mo
classical only
Active
classical only
Active
Signature stat
#12
#12 · THA players · of 230
Career timeline
12 entries2026
1st U18 player nationally
at age 17 · rated 1978
Jun 2026
All-time peak 1978
at age 17
Jun 2026
2025
Peak national rank: #11
at age 16 · rated 1906
Jun 2025
1st U16 player nationally
at age 16 · rated 1906
Jun 2025
Re-crossed 1800
at age 16
Feb 2025
2024
Best 12-month gain (+442 Elo)
1407 → 1849
Aug 2024
Standard rating history
Peak
FIDE title
Threshold
First rated
COVID-19
FIDE recal.
Activity & highlights
Top opponent
Evolution
+72
1906 → 1978
Tournaments
5
43 games
Score
25.5/ 4359.3%
20W11D12L
Top 3 wins
1.[W]vsThanadon KulpruethanonFM2,289·Thailand Final Qualifying Round for 46th Olympiad - Open·R2·+34.3
3.[W]vsArjuna Satria Pamungkas1,879·9th Eastern Asia Youth Chess Championships 2025 Standard-U16·R5·+24.0
Top 3 losses
1.[L]vsNguyen Nam Khanh Ha1,559·9th Eastern Asia Youth Chess Championships 2025 Standard-U16·R6·-32.3
Last 12 months — tournaments
5 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Round-Robin | May 2026 | 6/9 | #3 | 2074 | +84.8 |
Open Swiss | Apr 2026 | 5.5/9 | #8 | 1899 | +11.6 |
Swiss | Feb 2026 | 5/6 | #12 | 2291 | +72.0 |
Swiss | Jul 2025 | 5/9 | #9 | 1825 | -28.9 |
Swiss | Jul 2025 | 4/9 | #16 | 1747 | -68.4 |
Worst Elo result: 23rd ASEAN AGE GROUP CHESS CHAMPIONSHIP 2025 (U16 Open) (-68.4 Elo, finished #16).
Most-Played Opponents
vsJirath Punyanitya
🇹🇭THA·1677
+7 −4 =1
12 games·last met Apr 2025
View head-to-head →
vsPathee Chiravanich
🇹🇭THA·1709
+4 −4 =2
10 games·last met Dec 2023
View head-to-head →
vsAkararath Chokthitirath
🇹🇭THA·1560
+5 −0 =4
9 games·last met Apr 2024
View head-to-head →
vsNatrada Kaewwattha
🇹🇭THA·1715
+4 −3 =1
8 games·last met Mar 2026
View head-to-head →
vsDhi Tawankanjana
🇹🇭THA·1720
+2 −4 =1
7 games·last met Apr 2026
View head-to-head →
Rankings
/
Thailand
#12
out of 397 players
Asia-Pacific
#3,818
in continent
World
#31,127
out of 400,000+
National ranking
Europe & World
Europe
World
Thailand
| 1 | 🇹🇭Follow Prin LaohawirapapTrack their monthly FIDE ratings, games, tournaments and more. | 2,398 |
| 2 | 🇹🇭Follow Thanadon KulpruethanonTrack their monthly FIDE ratings, games, tournaments and more. | 2,259 |
| 3 | 🇹🇭Follow Jonathan BodemarTrack their monthly FIDE ratings, games, tournaments and more. | 2,124 |
| 4 | 🇹🇭Follow Poompong WiwatanadateTrack their monthly FIDE ratings, games, tournaments and more. | 2,070 |
| 5 | 🇹🇭Follow Tinnakrit ArunnuntapanichTrack their monthly FIDE ratings, games, tournaments and more. | 2,060 |
| 6 | 🇹🇭Follow Tupfah KhumnorkaewTrack their monthly FIDE ratings, games, tournaments and more. | 2,045 |
| 7 | 🇹🇭Follow Apichit BuakirdTrack their monthly FIDE ratings, games, tournaments and more. | 2,033 |
| 8 | 🇹🇭Follow Wisuwat TeerapabpaisitTrack their monthly FIDE ratings, games, tournaments and more. | 2,024 |
| 9 | 🇹🇭Follow Chawit AsavasaetakulTrack their monthly FIDE ratings, games, tournaments and more. | 1,996 |
| 10 | 🇹🇭Follow Sarocha ChuemsakulTrack her monthly FIDE ratings, games, tournaments and more. | 1,990 |
| ... | ||
| 12 | 1,978 | |
Asia-Pacific
| 1 | 🇺🇿Follow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more. | 2,777 |
| 1 | 🇺🇿Follow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,777 |
| 3 | 🇮🇳Follow Erigaisi ArjunTrack their monthly FIDE ratings, games, tournaments and more. | 2,761 |
| 4 | 🇨🇳Follow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more. | 2,753 |
| 5 | 🇮🇳Follow Viswanathan AnandTrack their monthly FIDE ratings, games, tournaments and more. | 2,739 |
| 6 | 🇨🇳Follow Liren DingTrack their monthly FIDE ratings, games, tournaments and more. | 2,738 |
| 7 | 🇮🇳Follow Praggnanandhaa RTrack their monthly FIDE ratings, games, tournaments and more. | 2,735 |
| 8 | 🇷🇺Follow Ian NepomniachtchiTrack their monthly FIDE ratings, games, tournaments and more. | 2,733 |
| 9 | 🇮🇳Follow Gukesh DTrack their monthly FIDE ratings, games, tournaments and more. | 2,732 |
| 10 | 🇻🇳Follow Quang Liem LeTrack their monthly FIDE ratings, games, tournaments and more. | 2,731 |
| ... | ||
| 3818 | 1,978 | |
World
| 1 | 🇳🇴Follow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more. | 2,841 |
| 2 | 🇺🇸Follow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more. | 2,792 |
| 2 | 🇺🇸Follow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more. | 2,792 |
| 4 | 🇺🇿Follow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more. | 2,777 |
| 4 | 🇺🇿Follow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,777 |
| 6 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
| 7 | 🇳🇱Follow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more. | 2,764 |
| 8 | 🇮🇳Follow Erigaisi ArjunTrack their monthly FIDE ratings, games, tournaments and more. | 2,761 |
| 9 | 🇺🇸Follow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more. | 2,753 |
| 9 | 🇨🇳Follow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more. | 2,753 |
| ... | ||
| 31127 | 1,978 | |