Format
JT
Jonker, Tertius
🇿🇦FIDE 14379325· Male· South Africa· Born in 2012
Follow Tertius JonkerTrack his monthly FIDE ratings, games, tournaments and more.
Tertius Jonker, a 14-year-old South African player, is rated 1473 — just 25 short of his peak of 1498 (Apr 2025, age 13). He has fluctuated between 1412 and 1498 over the past 2 years. 42 rated games in the past year (≈46/year long-term). Recent standard appearances include 2026 South African Junior Closed (U14 Boys), 2026 Lubowski Open Chess Tournament (C), and 2026 Chris Greyling Tournament (C). Also played 2 blitz events (including 2025 South African Open Chess Championships (Blitz)) recently.
At junior level, he reached #70 nationally in U14.
Current rating
1473
Standard
Rpd—·Blz—
All-time high
1498
−25 pts below
Apr 2025 · age 13
Apr 2025 · age 13
Activity
43
games / yr avg. · ≈4/mo
42 past 12 mo · ≈4/mo
classical only
Active
classical only
Active
Signature stat
#195,872
#195,872 · players worldwide · of 218,279
Career timeline
5 entries2025
All-time peak 1498
at age 13 · −25 from today
Apr 2025
70th South African U14 player
at age 13 · rated 1494
Mar 2025
Crossed 1400
at age 13
Mar 2025
Crossed 1200
at age 13
Mar 2025
First FIDE rating
1494 · at age 13
Mar 2025
Standard rating history
Peak
FIDE title
Threshold
First rated
Activity & highlights
Evolution
-14
1487 → 1473
Tournaments
15
90 games
Score
39.5/ 9043.9%
39W13D38L
Top 3 wins
Top 3 losses
2.[L]vsShivam Naidoo1,427·2025 Mzansi Inter Provincial Team Championships (U14 Open Championship)·R4·-22.5
Last 12 months — tournaments
15 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Mar 2026 | 2/5 | #57 | 1482 | +16.4 |
Swiss | Mar 2026 | 2.5/4 | #12 | 1592 | -0.4 |
Swiss | Mar 2026 | 3.5/3 | #4 | 2304 | +15.2 |
Swiss | Mar 2026 | 4/1 | #10 | 2286 | +23.6 |
Swiss | Feb 2026 | 0.5/3 | #24 | 1309 | -32.8 |
Swiss | Feb 2026 | 2.5/5 | #9 | 1595 | +41.6 |
Swiss | Feb 2026 | 1/2 | #23 | 1532 | -3.2 |
Swiss | Jan 2026 | 2/2 | #27 | — | +7.2 |
Swiss | Jan 2026 | 1/2 | #16 | 1568 | -25.6 |
Open Swiss | Dec 2025 | 3/4 | #8 | 1742 | +24.4 |
Rankings
/
South Africa
#1,540
out of 1,876 players
Africa
#8,348
in continent
World
#195,775
out of 400,000+
National ranking
Europe & World
Europe
World
South Africa
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