Format
ML
Mertens, Lesley
🇧🇪FIDE 246948· Male· Belgium· Born in 1977
Follow Lesley MertensTrack his monthly FIDE ratings, games, tournaments and more.
Lesley Mertens, a 49-year-old Belgian player, is rated 1608 — just 11 short of his peak of 1619 (Jan 2026, age 49). He is progressing steadily with +44 Elo over the past 12 months. 12 rated games in the past year (≈3/year long-term). Recent standard appearances include Clubkampioenschap Mol 2025-2026 Rondes 7-8, Belgian Interclubs Round 2025-2026 Ronde 10, and Clubkampioenschap Mol 2025-2026 Ronde 6. Also played 1 rapid event (including Rokade Rapid Chess 2026) recently. He took a 17-month break between Apr 2024 and Oct 2025.
Current rating
1608
Standard
Rpd1505·Blz—
All-time high
1619
−11 pts below
Jan 2026 · age 49
Jan 2026 · age 49
Activity
4
games / yr avg.
12 past 12 mo · ≈1/mo
classical only
Occasional
classical only
Occasional
Signature stat
#143,920
#143,920 · players worldwide · of 218,279
Career timeline
9 entries2026
K-factor lowered to 20
at age 49
May 2026
Re-crossed 1600
at age 49
Apr 2026
All-time peak 1619
at age 49 · −11 from today
Jan 2026
2025
Crossed 1600
at age 48
Dec 2025
2024
Inactive for 17 months
paused at 1564 → returned at 1561
Apr 2024
Best 12-month gain (+299 Elo)
1276 → 1575
Mar 2024
Standard rating history
Peak
FIDE title
Threshold
First rated
Inactive period
COVID-19
FIDE recal.
Activity & highlights
Top opponent
Evolution
+44
1564 → 1608
Tournaments
9
13 games
Score
6/ 1346.2%
5W2D6L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
9 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Swiss | May 2026 | 0/1 | #11 | 916 | -7.2 |
Swiss | Apr 2026 | 0.5/2 | #10 | 1708 | +7.6 |
Team | Mar 2026 | 0/1 | #965 | 787 | -20.4 |
Swiss | Mar 2026 | 1/1 | #2 | 2596 | +30.4 |
Team | Feb 2026 | 0/1 | #1213 | 777 | -22.4 |
Swiss | Dec 2025 | 0.5/1 | #5 | 1631 | +1.6 |
Team | Dec 2025 | 1/1 | #458 | 2252 | +12.0 |
Swiss | Nov 2025 | 3/3 | #5 | 2537 | +44.4 |
Open Swiss | Sep 2025 | 0/1 | #57 | 1174 | -3.2 |
Rankings
/
Belgium
#2,290
out of 3,338 players
Europe
#96,676
in continent
World
#143,909
out of 400,000+
National ranking
Europe & World
Europe
World
Belgium
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