KNSB FIDE
BJ

Bas Jonkers

Rated since January 2023

1885 Classic
1889 Rapid
1889 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
VAN DAEL, JONAS 1922
10472 Tata Steel Chess Tournament 2026 Dagvierkampen · Tuesday 20 January 2026
ZWIETEN VAN, R. (REMY) 1897
12798 SGA Competitie 2025-2026 Zilveren Beker kwartfinale · Friday 9 January 2026
HOEGEN DIJKHOF, H. (HARRALD) 1893
11617 UniClass Science Park Amsterdam Schaaktoernooi Dagvierkampen · Sunday 13 July 2025
DEKKER, J.P. (JOP) 1886
13892 17e Kattenburger Open Toernooi KO17 ronde 7 · Sunday 31 May 2026
HEIJLMAN, M. (MARTIN) 1878
12197 SGA Competitie 2025-2026 Zilveren Beker ronde 1 · Monday 27 October 2025
Worst losses
KNIGHT, D.R. (DAVID) 1883
13746 Amsterdam Chess Festival Dagvierkampen 2026 Groep A · Wednesday 15 July 2026
ZUIDBERG, K. (KOEN) 1892
10472 Tata Steel Chess Tournament 2026 Dagvierkampen · Wednesday 21 January 2026
KAMP VAN DE, R.C. (ROB) 1901
11617 UniClass Science Park Amsterdam Schaaktoernooi Dagvierkampen · Tuesday 8 July 2025
BOONSTRA, J. (JASPER) 1939
12190 SGA Competitie 2025-2026 1e Klasse B ronde 1 · Friday 17 October 2025
BOLDERMAN, J. (JOPPE) 1944
13334 17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 5 · Sunday 22 March 2026
Amsterdam Chess Festival Dagvierkampen 2026 Groep A Monday 13 July 2026 +0–1=2 -14.1
Tata Steel Chess Tournament 2026 Dagvierkampen Friday 16 January 2026 +2–1=0 +11.1
UniClass Science Park Amsterdam Schaaktoernooi Dagvierkampen Saturday 5 July 2025 +1–1=1 -0.6
13e Best of the West Groep A, ronde 7 Saturday 18 October 2025 +1–0=0 +7.3
13e Best of the West Groep A, Ronde 6 Saturday 18 October 2025 +0–1=0 -10.2
13e Best of the West Groep A, ronde 5 Saturday 18 October 2025 +1–0=0
13e Best of the West Groep A, ronde 4 Saturday 18 October 2025 +0–0=1 -5.4
13e Best of the West Groep A, ronde 3 Saturday 18 October 2025 +0–0=1 -1.9
13e Best of the West Groep A, ronde 2 Saturday 18 October 2025 +0–0=1 -4.2
17e Kattenburger Open Toernooi KO17 ronde 7 Sunday 12 October 2025 +1–0=0 +12.2
17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 6 Sunday 12 October 2025 +1–0=0
17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 5 Sunday 12 October 2025 +0–1=0 -11.6
17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 4 Sunday 12 October 2025 +1–0=0 +8.4
17e Kattenburger Open Toernooi Ronde 3 Sunday 12 October 2025 +0–1=0 -9.4
17e Kattenburger Open Toernooi Ronde 1 Sunday 12 October 2025 +1–0=0 +4.4
SGA Competitie 2025-2026 1e Klasse B ronde 7 Wednesday 1 October 2025 +0–1=0 -5.7
SGA Competitie 2025-2026 1e Klasse B ronde 6 Wednesday 1 October 2025 +1–0=0 +6.9
SGA Competitie 2025-2026 1e Klasse B ronde 5 Wednesday 1 October 2025 +0–0=1 -0.4
SGA Competitie 2025-2026 Zilveren Beker halve finale Wednesday 1 October 2025 +0–1=0 -11.0
SGA Competitie 2025-2026 1e Klasse B ronde 4 Wednesday 1 October 2025 +0–0=1 +0.5
SGA Competitie 2025-2026 Zilveren Beker kwartfinale Wednesday 1 October 2025 +1–0=0 +12.9
SGA Competitie 2025-2026 Hoofdklasse ronde 3 Wednesday 1 October 2025 +0–1=0 -10.4
SGA Competitie 2025-2026 1e Klasse B ronde 2 Wednesday 1 October 2025 +0–0=1 -0.5
SGA Competitie 2025-2026 Hoofdklasse ronde 2 Wednesday 1 October 2025 +0–1=0 -3.9
SGA Competitie 2025-2026 Zilveren Beker ronde 1 Wednesday 1 October 2025 +1–0=0 +11.7
SGA Competitie 2025-2026 1e Klasse B ronde 1 Wednesday 1 October 2025 +0–1=0 -11.2
16e Kattenburger Open Toernooi Groep A Monday 1 September 2025 +1–0=0 +7.9
SGA Competitie 2024-2025 Hoofdklasse ronde 7 Monday 30 September 2024 +0–1=0 -10.0

Team Competition

Current teams
ENPS
Zilveren Beker · 2025-2026 · 3 games
ENPS 1
Hoofdklasse · 2025-2026 · 2 games
ENPS 2
1e Klasse B · 2025-2026 · 6 games
Past teams
ENPS 1
Hoofdklasse · 2024-2025
ENPS
Zilveren Beker · 2023-2024
ENPS 1
Hoofdklasse · 2023-2024
ENPS 2
1e Klasse B · 2023-2024

Rating History

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Peak Ratings

Classic 1918 March 1, 2025
Rapid 1917 March 1, 2026
Blitz 1917 March 1, 2026

Games

Wins 13
Losses 12
Draws 9
Win Rate 38%

Performance by Color

Color Wins Draws Losses Win Rate
White 8 4 2 57%
Black 5 5 10 25%

Recent Matches

Knight, D.R. (David) (1883) Wednesday 15 July 2026 LOSS -13.1
Dekker, A. (Albert) (1890) Tuesday 14 July 2026 DRAW -0.3
Zwet van, A.M. (Matthias) (1878) Monday 13 July 2026 DRAW -0.7
Rekelhof, M. (Martin) (1724) Saturday 13 June 2026 WIN +7.3
Dekker, J.P. (Jop) (1886) Sunday 31 May 2026 WIN +12.2
Cromsigt, J. (Jeroen) (1962) Saturday 9 May 2026 LOSS -10.2
FM Roebers, J.S. (Jan) (2108) Thursday 7 May 2026 LOSS -5.7
Oosterink, T.J. (Timo) Sunday 19 April 2026 WIN
Nijhuis, M. (Maurits) Saturday 18 April 2026 WIN
Tawfiq, A.I. (Kareem) (1718) Friday 10 April 2026 WIN +6.9
Bolderman, J. (Joppe) (1944) Sunday 22 March 2026 LOSS -11.6
Egdell, B.J. (Brian) (1907) Wednesday 18 March 2026 DRAW -0.4
Schol, J. (Jan) (1754) Saturday 14 March 2026 DRAW -5.4
Hufener, T. (Thomas) (1961) Friday 6 March 2026 LOSS -11.0
Vlis van der, P. (Peter) (1854) Saturday 21 February 2026 DRAW -1.9
Tjin a Lien, I.T.L. (Ike) (1789) Sunday 15 February 2026 WIN +8.4
Ozkoc, S. (Serkan) (1923) Friday 13 February 2026 DRAW +0.5
Zuidberg, K. (Koen) (1892) Wednesday 21 January 2026 LOSS -12.3
Van Dael, Jonas (1922) Tuesday 20 January 2026 WIN +13.8
Kuiper, W. (Willem) (1804) Monday 19 January 2026 WIN +9.7