KNSB FIDE
SJ

Siegbert de Jong

Rated since January 2023

1936 Classic

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
BANNING, C. (CEES) 2018
12265 KNSB competitie 2025-2026 Klasse 5 ronde 2 · Saturday 1 November 2025
ADEN, M. (MEINO) 1963
13315 KNSB competitie 2025-2026 Klasse 5 ronde 5 · Saturday 28 March 2026
WIND, E.T. (EGBERT) 1957
12119 K.S.C. Philidor 1847 interne competitie 29-09-2025 t/m 20-10-2025 (0… · Monday 29 September 2025
JELLEMA, C.J. (CRIS JOLMER) 1888
12014 FSB-competitie 2025-2026 ronde 3 2e klasse · Monday 24 November 2025
SCHADD, B.J. (JAN) 1875
12992 KNSB competitie 2025-2026 Klasse 5 ronde 6 · Saturday 7 February 2026
Worst losses
EELSINGH, J. (JANKO) 1755
12018 FSB-competitie 2025-2026 ronde 4 2e klasse · Monday 15 December 2025
BORTOLUSSI, FRANCESCO 1814
12358 Waling Dijkstra Weekendtoernooi 2025 - · Saturday 15 November 2025
TORENSMA, J. (JAN) 1862
11323 K.S.C. Philidor 1847 interne competitie 04-03-2025 t/m 20-05-2025 (0… · Tuesday 6 May 2025
BRUINSMA, J. (JURA) 1864
11836 FSB-competitie 2025-2026 ronde 1 2e klasse · Monday 6 October 2025
JORRITSMA, W. (WANDER) 1875
11854 K.S.C. Philidor 1847 interne competitie 08-09-2025 t/m 22-09-2025 (0… · Monday 22 September 2025
No FIDE-rated tournaments found.
K.S.C. Philidor 1847 interne competitie 23-02-2026 t/m 22-04-2026 (0… Sunday 22 February 2026 +1–0=2 +9.0
Waling Dijkstra Weekendtoernooi 2025 - Friday 14 November 2025 +3–3=0 -2.4
KNSB competitie 2025-2026 Klasse 3 ronde 9 Saturday 20 September 2025 +0–1=0 -10.1
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +1–0=0 +14.2
KNSB competitie 2025-2026 Klasse 5 ronde 7 Saturday 20 September 2025 +0–0=1 -0.3
KNSB competitie 2025-2026 Klasse 5 ronde 6 Saturday 20 September 2025 +1–0=0 +11.1
KNSB competitie 2025-2026 Klasse 5 ronde 4 Saturday 20 September 2025 +0–1=0 -9.4
KNSB competitie 2025-2026 Klasse 5 Ronde 3 Saturday 20 September 2025 +0–0=1 -0.3
KNSB competitie 2025-2026 Klasse 5 ronde 2 Saturday 20 September 2025 +1–0=0 +16.2
KNSB competitie 2025-2026 Klasse 5 ronde 1 Saturday 20 September 2025 +0–0=1 +0.2
K.S.C. Philidor 1847 interne competitie 26-01-2026 t/m 09-02-2026 (0… Monday 8 September 2025 +0–2=0 -18.7
K.S.C. Philidor 1847 interne competitie 12-01-2026 t/m 19-01-2026 (0… Monday 8 September 2025 +1–0=0 +5.9
K.S.C. Philidor 1847 interne competitie 27-10-2025 t/m 22-12-2025 (0… Monday 8 September 2025 +0–0=1 +1.1
K.S.C. Philidor 1847 interne competitie 29-09-2025 t/m 20-10-2025 (0… Monday 8 September 2025 +3–0=0 +25.7
K.S.C. Philidor 1847 interne competitie 08-09-2025 t/m 22-09-2025 (0… Monday 8 September 2025 +0–1=0 -13.8
FSB-competitie 2025-2026 ronde 6 2e klasse Monday 1 September 2025 +1–0=0 +8.0
FSB-competitie 2025-2026 ronde 5 2e klasse Monday 1 September 2025 +1–0=0 +8.1
FSB-competitie 2025-2026 ronde 4 2e klasse Monday 1 September 2025 +0–1=0 -18.0
FSB-competitie 2025-2026 ronde 3 2e klasse Monday 1 September 2025 +1–0=0 +11.8
FSB-competitie 2025-2026 ronde 2 2e klasse Monday 1 September 2025 +0–1=0
FSB-competitie 2025-2026 ronde 1 2e klasse Monday 1 September 2025 +0–1=0 -13.7
K.S.C. Philidor 1847 interne competitie 27-05-2025 t/m 27-05-2025 (0… Monday 3 March 2025 +1–0=0 +7.9
K.S.C. Philidor 1847 interne competitie 04-03-2025 t/m 20-05-2025 (0… Monday 3 March 2025 +3–1=1 +0.6

Rating History

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Peak Ratings

Classic 1937 April 1, 2026
Rapid 1937 May 1, 2026
Blitz 1937 May 1, 2026

Games

Wins 18
Losses 12
Draws 7
Win Rate 49%

Performance by Color

Color Wins Draws Losses Win Rate
White 6 3 9 33%
Black 12 4 3 63%

Recent Matches

Wildschut, M. (Marcel) (2008) Saturday 11 April 2026 LOSS -10.1
Aden, M. (Meino) (1963) Saturday 28 March 2026 WIN +14.2
Postma, W. (Willem) (1782) Friday 27 March 2026 WIN +8.0
Botter, S. (Simon) (2044) Tuesday 24 March 2026 DRAW +4.4
Ploeger, P. (Pieter) (1606) Monday 9 March 2026 WIN +3.5
Gunal, F. (Faruk) (1906) Saturday 7 March 2026 DRAW -0.3
FM Etmans, M.D. (Maarten) (1948) Tuesday 3 March 2026 DRAW +1.2
Merkus, K. (Klaas) (1782) Monday 9 February 2026 WIN +8.1
Schadd, B.J. (Jan) (1875) Saturday 7 February 2026 WIN +11.1
Visscher, H. (Harmen) (1976) Monday 2 February 2026 LOSS -10.4
Boer de, R. (Rein) (2031) Monday 26 January 2026 LOSS -8.3
Bratanin, A. (Anton) (1702) Monday 19 January 2026 WIN +5.9
Eelsingh, J. (Janko) (1755) Monday 15 December 2025 LOSS -18.0
Dijkstra, M. (Maarten) (2012) Saturday 13 December 2025 LOSS -9.4
FM Etmans, M.D. (Maarten) (1954) Monday 1 December 2025 DRAW +1.1
Jellema, C.J. (Cris Jolmer) (1888) Monday 24 November 2025 WIN +11.8
Kolijn, D. (David) (1901) Saturday 22 November 2025 DRAW -0.3
Zecha, O.A. (Oscar) (2143) Sunday 16 November 2025 LOSS -5.2
Ackermann, Robert (1823) Sunday 16 November 2025 WIN +9.5
Bakker, J.M. (Jouke) (2237) Saturday 15 November 2025 LOSS -3.1