KNSB FIDE
LS

Leandro Slagboom

Rated since June 2018

2334 Classical
2373 Rapid
2118 Blitz

The good & the bad

Best wins
JENS, A.J. (JELMER) (IM) 2378
Dutch Team Competition - Meesterklasse Round 6 · 2026-03-28
DE BOER, BAS (CM) 2205
Belgian Interclubs Round 2025-2026 Ronde 8 · 2026-03-01
Worst losses
KOKJE, J.J.I. (JORIS) (FM) 2269
Dutch Team Competition - Meesterklasse Round 8 · 2026-03-07
VROLIJK, L.N. (LIAM) (GM) 2518
Dutch Team Competition - Meesterklasse Round 5 · 2025-12-13

FIDE Tournaments

Dutch Team Competition - Meesterklasse Round 9 2026-04-11 +0–0=1 -1.6
Belgian Interclubs Round 2025-2026 Ronde 8 2026-03-01 +1–0=0 +6.6
Dutch Team Competition - Meesterklasse Round 8 2026-03-07 +0–1=0 -11.6
Dutch Team Competition - Meesterklasse Round 6 2026-03-28 +1–0=0 +11.4
Dutch Team Competition - Meesterklasse Round 7 2026-02-07 +0–0=1 -2.4
Dutch Team Competition - Meesterklasse Round 5 2025-12-13 +0–1=0 -5.2
Weekendtoernooi Groninger Combinatie / PK NOSBO Groep A Thursday 14 May 2026 +10–2=2 +1.1
KNSB competitie 2025-2026 Meesterklasse ronde 9 Saturday 20 September 2025 +0–0=2 -2.3
KNSB competitie 2025-2026 Meesterklasse ronde 6 Saturday 20 September 2025 +1–0=0 +6.4
KNSB competitie 2025-2026 Meesterklasse ronde 8 Saturday 20 September 2025 +0–1=0 -7.4
KNSB competitie 2025-2026 Meesterklasse ronde 7 Saturday 20 September 2025 +0–0=2 -3.7
KNSB competitie 2025-2026 Meesterklasse ronde 5 Saturday 20 September 2025 +0–1=0 -3.4
KNSB competitie 2025-2026 Meesterklasse ronde 4 Saturday 20 September 2025 +0–0=1 +0.9
KNSB competitie 2025-2026 Meesterklasse ronde 3 Saturday 20 September 2025 +0–0=1 -1.0
KNSB competitie 2025-2026 Meesterklasse ronde 2 Saturday 20 September 2025 +0–0=1 -1.5
KNSB competitie 2025-2026 Meesterklasse ronde 1 Saturday 20 September 2025 +0–0=1 -0.9
UniClass Science Park Amsterdam Schaaktoernooi Groep A Saturday 5 July 2025 +5–0=4 +1.1
Tata Steel Chess Tournament 2025 Qualifiers Friday 17 January 2025 +4–2=3 +14.1
Chess Festival Groningen Open A Saturday 21 December 2024 +3–2=4 -10.0
Hoogeveen Schaaktoernooi Open Groep Saturday 26 October 2024 +5–2=1 +4.4
KNSB competitie 2024-2025 Meesterklasse ronde 9 Saturday 21 September 2024 +0–0=1 -0.9
KNSB competitie 2024-2025 Meesterklasse ronde 8 Saturday 21 September 2024 +0–1=0 -9.0
KNSB competitie 2024-2025 Meesterklasse ronde 7 Saturday 21 September 2024 +1–0=0 +6.0
KNSB competitie 2024-2025 Meesterklasse ronde 6 Saturday 21 September 2024 +0–1=0 -6.0
KNSB competitie 2024-2025 Meesterklasse ronde 5 Saturday 21 September 2024 +0–0=1 -0.4
KNSB competitie 2024-2025 Meesterklasse ronde 4 Saturday 21 September 2024 +1–0=0 +6.8
KNSB competitie 2024-2025 Meesterklasse ronde 3 Saturday 21 September 2024 +1–0=0 +6.8
KNSB competitie 2024-2025 Meesterklasse ronde 2 Saturday 21 September 2024 +0–0=1 +0.9
KNSB competitie 2024-2025 Meesterklasse ronde 1 Saturday 21 September 2024 +0–0=1 -0.6
HSG Open 2024 Groep A Friday 21 June 2024 +8–2=2 +10.1
Tata Steel Chess Tournament 2024 Tienkampen Friday 12 January 2024 +10–2=6 +43.6
Chess Festival Groningen Open A Thursday 21 December 2023 +6–4=8 +8.3
Hoogeveen 2023 Open Groep A Saturday 21 October 2023 +10–4=0 +3.9
Chessmates 2023 Chessmates 2023 Friday 20 October 2023 +4–0=6 -3.7
KNSB competitie 2023-2024 Meesterklasse ronde 9 Saturday 16 September 2023 +0–0=2 +2.0
KNSB competitie 2023-2024 Meesterklasse ronde 8 Saturday 16 September 2023 +0–2=0 -23.6
KNSB competitie 2023-2024 Meesterklasse ronde 7 Saturday 16 September 2023 +0–0=2 -0.2
KNSB competitie 2023-2024 Meesterklasse ronde 6 Saturday 16 September 2023 +0–0=2 +4.0
KNSB competitie 2023-2024 Meesterklasse ronde 5 Saturday 16 September 2023 +2–0=0 +7.3
KNSB competitie 2023-2024 Meesterklasse ronde 4 Saturday 16 September 2023 +0–2=0 -11.8
KNSB competitie 2023-2024 Meesterklasse ronde 3 Saturday 16 September 2023 +0–2=0 -19.3
KNSB competitie 2023-2024 Meesterklasse ronde 2 Saturday 16 September 2023 +2–0=0 +15.3
KNSB competitie 2023-2024 Meesterklasse ronde 1 Saturday 16 September 2023 +0–0=2 -1.3
Riga Technical University Open 2023 - Tournament A Monday 7 August 2023 +10–4=4 -24.4
15e BPB Limburg Open 2023 Groep A Friday 26 May 2023 +4–2=8 +35.2
Weekendtoernooi Groninger Combinatie / PK NOSBO Groep A Thursday 18 May 2023 +8–0=6 -5.1
Tata Steel Chess Tournament 2023 Weekendvierkampen Friday 13 January 2023 +4–0=2 +40.5

Rating History

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Peak Ratings

Classical 2382
Rapid 2373
Blitz 2118

Games

Wins 2
Losses 2
Draws 2
Win Rate 33%

Performance by Color

Color Wins Draws Losses Win Rate
White 0 2 0 0%
Black 2 0 2 50%

All-time Games (from rating history)

Classical 368
Rapid 29
Blitz 57

Recent Matches

FM Tondivar, B. (babak) (2279) 2026-04-11 DRAW -1.6
CM De Boer, Bas (2205) 2026-03-01 WIN +6.6
FM Kokje, J.j.i. (joris) (2269) 2026-03-07 LOSS -11.6
IM Jens, A.j. (jelmer) (2378) 2026-03-28 WIN +11.4
FM Lammens, T.j. (tim) (2245) 2026-02-07 DRAW -2.4
GM Vrolijk, L.n. (liam) (2518) 2025-12-13 LOSS -5.2