KNSB FIDE
TZ

Thom Zwamborn

Rated since January 2023

1973 Classic
1930 Rapid
1984 Blitz

RIVALRY

Nemesis
Piel, R.J. (Ruben)
Games: 3 · Win rate: 67%
Kryptonite
Beltman, J.B. (Joost)
Games: 3 · Win rate: 33%

The good & the bad

Best wins
ANDRINGA, A.T. (ARJO) 2094
9787 2025 Chess.com Botwinnik Rapid toernooi Groep A · Saturday 4 January 2025
KRONEMEIJER, S. (SIMON) 2059
9787 2025 Chess.com Botwinnik Rapid toernooi Groep A · Saturday 4 January 2025
JURRIUS, T. (THEO) 2032
10704 KNSB competitie 2024-2025 Klasse 4 ronde 7 · Saturday 8 March 2025
HACQUEBORD, T. (TJERK) 2018
9651 SOS Competitie 2024/2025 2025-02 · Wednesday 19 February 2025
BACHAUS, S. (SANDER) 2006
9109 50e Open Kampioenschap van Utrecht Groep A · Sunday 1 June 2025
Worst losses
LANDOLT, B.J. (BART) 1743
7152 Open Kampioenschap van Utrecht Groep B · Saturday 20 May 2023
BELTMAN, J.B. (JOOST) 1745
7805 KNSB competitie 2023-2024 Klasse 4 ronde 4 · Saturday 25 November 2023
POL VAN DER, R. (RICO) 1813
7580 KNSB competitie 2023-2024 Klasse 4 ronde 1 · Saturday 16 September 2023
ZELST VAN, P. (PETER) 1837
12478 SGS Bekercompetitie 2025-2026 2026-01 · Sunday 30 November 2025
BERKELAAR, D.N. (DICK) 1841
7605 SOS Competitie 2023/2024 November 2023 · Wednesday 1 November 2023
Tata Steel Chess Tournament 2026 Weekendvierkampem Friday 16 January 2026 +2–0=1 +26.7
Amsterdam Chess Open Groep B1 Friday 24 October 2025 +3–2=1 +18.4
17e BPB Limburg Open 2025 Groep B Friday 6 June 2025 +1–3=3 -4.2
50e Open Kampioenschap van Utrecht Groep A Friday 30 May 2025 +1–3=2 -8.7
2025 Chess.com Botwinnik Rapid toernooi Groep A Saturday 4 January 2025 +3–4=0 +16.2
HSG Open 2024 Groep A Friday 21 June 2024 +1–3=1 -4.2
Tata Steel Chess Tournament 2024 Weekendvierkampen Friday 12 January 2024 +2–0=1 +41.4
Open Kampioenschap van Utrecht Groep B Friday 19 May 2023 +1–1=3 -20.8
SGS Bekercompetitie 2025-2026 2026-01 Wednesday 1 October 2025 +0–1=0 -15.7
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +2–0=0 +18.2
KNSB competitie 2025-2026 Klasse 5 ronde 6 Saturday 20 September 2025 +0–0=1 -2.3
KNSB competitie 2025-2026 Klasse 5 ronde 4 Saturday 20 September 2025 +1–0=0 +6.7
KNSB competitie 2025-2026 Klasse 5 Ronde 3 Saturday 20 September 2025 +1–0=0 +8.2
KNSB competitie 2025-2026 Klasse 5 ronde 2 Saturday 20 September 2025 +0–0=1 +0.3
KNSB competitie 2025-2026 Klasse 5 ronde 1 Saturday 20 September 2025 +1–0=0 +2.3
SOS competitie 2025/2026 Lijst 1 mei Monday 1 September 2025 +0–1=0 -11.4
SOS competitie 2025/2026 Lijst 1 apr Monday 1 September 2025 +0–2=0 -3.7
SOS competitie 2025/2026 Lijst 1 mrt Monday 1 September 2025 +0–0=1 +2.2
SOS competitie 2025/2026 Lijst 1 feb Monday 1 September 2025 +0–0=1 +2.2
SOS competitie 2025/2026 Lijst 1 jan Monday 1 September 2025 +1–1=0 +4.3
SOS competitie 2025/2026 Lijst 1 Dec Monday 1 September 2025 +1–0=0 +13.2
SOS competitie 2025/2026 Lijst 1 Nov Monday 1 September 2025 +0–1=1 -3.0
KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … Saturday 21 September 2024 +0–1=0 -11.7
KNSB competitie 2024-2025 Klasse 4 ronde 8 Saturday 21 September 2024 +0–1=0 -12.4
KNSB competitie 2024-2025 Klasse 4 ronde 7 Saturday 21 September 2024 +1–0=0 +16.0
KNSB competitie 2024-2025 Klasse 4 ronde 6 Saturday 21 September 2024 +1–0=0 +12.1
KNSB competitie 2024-2025 Klasse 4 ronde 5 Saturday 21 September 2024 +0–0=1 +2.3
KNSB competitie 2024-2025 Klasse 4 ronde 4 Saturday 21 September 2024 +0–0=1 +5.9
KNSB competitie 2024-2025 Klasse 4 ronde 3 Saturday 21 September 2024 +0–1=0 -10.3
KNSB competitie 2024-2025 KNSB Beker ronde 1 voor decemberlijst Saturday 21 September 2024 +1–0=0 +15.8
KNSB competitie 2024-2025 Klasse 4 ronde 2 Saturday 21 September 2024 +0–1=0 -8.0
SOS Competitie 2024/2025 2025-05 Sunday 1 September 2024 +0–1=0 -7.5
SOS Competitie 2024/2025 2025-04 Sunday 1 September 2024 +0–0=1 -0.2
SOS Competitie 2024/2025 2025-03 Sunday 1 September 2024 +1–0=0 +10.7
SOS Competitie 2024/2025 2025-02 Sunday 1 September 2024 +1–0=0 +16.4
SOS Competitie 2024/2025 2025-01 Sunday 1 September 2024 +0–1=0 -12.1
SOS Competitie 2024/2025 2024-12 Sunday 1 September 2024 +0–0=1 +1.8
SOS Competitie 2024/2025 2024-11 Sunday 1 September 2024 +1–0=0 +13.5
SOS Competitie 2024/2025 2024-10 Sunday 1 September 2024 +1–0=1 +16.5
49e Open Kampioenschap van Utrecht Groep A Friday 10 May 2024 +0–5=1 -60.9
KNSB competitie 2023-2024 Klasse 4 ronde 9 Saturday 16 September 2023 +1–0=0 +13.6
KNSB competitie 2023-2024 Klasse 4 ronde 8 Saturday 16 September 2023 +1–0=0 +17.3
KNSB competitie 2023-2024 Klasse 4 ronde 7 Saturday 16 September 2023 +1–0=0 +17.8
KNSB competitie 2023-2024 Klasse 4 ronde 6 Saturday 16 September 2023 +0–1=0 -13.2
KNSB competitie 2023-2024 Klasse 4 ronde 5 Saturday 16 September 2023 +0–0=1 +2.2
KNSB competitie 2023-2024 Klasse 4 ronde 4 Saturday 16 September 2023 +0–1=0 -18.9
KNSB competitie 2023-2024 KNSB Beker 2023-2024 voor novemberlijst Saturday 16 September 2023 +1–0=0 +23.0
KNSB competitie 2023-2024 Klasse 4 ronde 1 Saturday 16 September 2023 +0–1=0 -15.3
SOS Competitie 2023/2024 Mei 2024 Friday 1 September 2023 +0–1=0 -14.7
SOS Competitie 2023/2024 April 2024 Friday 1 September 2023 +0–1=0 -5.8
SOS Competitie 2023/2024 Maart 2024 Friday 1 September 2023 +1–0=0 +17.8
SOS Competitie 2023/2024 Februari 2024 Friday 1 September 2023 +1–0=0 +13.5
SOS Competitie 2023/2024 Januari 2024 Friday 1 September 2023 +1–0=0 +13.7
SOS Competitie 2023/2024 December 2023 Friday 1 September 2023 +0–0=1 -4.6
SOS Competitie 2023/2024 November 2023 Friday 1 September 2023 +0–1=0 -14.6
SOS Competitie 2023/2024 September 2023 Friday 1 September 2023 +1–0=0 +16.3
SGS Bekercompetitie Juni 2023 Monday 17 October 2022 +0–1=0 -5.2
SGS Bekercompetitie apr 2023 Monday 17 October 2022 +0–0=1 -0.1
SGS Bekercompetitie Jan 2023 Monday 17 October 2022 +1–0=0 +15.0
KNSB competitie 2022-2023 Klasse 4 ronde 8 Saturday 17 September 2022 +1–0=0 +26.0
KNSB competitie 2022-2023 Klasse 4 ronde 7 Saturday 17 September 2022 +1–0=0 +21.3
KNSB competitie 2022-2023 Klasse 4 ronde 6 Saturday 17 September 2022 +0–0=1 +3.8
KNSB competitie 2022-2023 Beker ronde 2 Saturday 17 September 2022 +0–1=0 -3.3
SOS Competitie 2022/2023 Mei Monday 12 September 2022 +0–1=0 -7.2
SOS Competitie 2022/2023 April 2023(HK) Monday 12 September 2022 +0–0=1 +7.6
SOS Competitie 2022/2023 Maart 2023(HK) Monday 12 September 2022 +0–0=1 -5.6
SOS Competitie 2022/2023 Februari 2023 Monday 12 September 2022 +0–0=1 +0.2
SOS Competitie 2022/2023 Januari 2023 Monday 12 September 2022 +0–1=0 -3.8
SOS Competitie 2022/2023 December 2022 Monday 12 September 2022 +0–0=1 +9.9

Rating History

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Peak Ratings

Classic 1984 April 1, 2026
Rapid 1930 Feb. 1, 2025
Blitz 1984 April 1, 2026

Games

Wins 39
Losses 43
Draws 31
Win Rate 35%

Performance by Color

Color Wins Draws Losses Win Rate
White 18 14 21 34%
Black 21 17 22 35%

Recent Matches

Heijnekamp, N. (Niels) (2016) Friday 24 April 2026 LOSS -11.4
Drewes, B.A. (Benno) (1877) Saturday 28 March 2026 WIN +9.1
Drewes, B.A. (Benno) (1877) Saturday 28 March 2026 WIN +9.1
IM Grutter, T.J. (Tim) (2392) Wednesday 11 March 2026 LOSS -1.8
IM Grutter, T.J. (Tim) (2392) Wednesday 11 March 2026 LOSS -1.8
Pel van, G. (Gerben) (2039) Friday 13 February 2026 DRAW +2.2
Leur de, B. (Ben) (1910) Saturday 7 February 2026 DRAW -2.3
Koning de, M. (Martin) (1973) Sunday 18 January 2026 WIN +13.0
Berghuis, M. (Marten) (2014) Saturday 17 January 2026 DRAW +1.9
Bakker, J. (Johan) (1943) Friday 16 January 2026 WIN +11.9
Verweij, L.A. (Kees) (2022) Wednesday 14 January 2026 DRAW +2.2
Verweij, G.S. (Geert) (1776) Saturday 13 December 2025 WIN +6.7
Zelst van, P. (Peter) (1837) Sunday 30 November 2025 LOSS -15.7
Liefbroer, A.C. (Aat) (1922) Thursday 27 November 2025 WIN +12.2
Ercan, S. (Selman) (2067) Wednesday 26 November 2025 LOSS -7.9
Hoeven van der, C. (Carsten) (1804) Saturday 22 November 2025 WIN +8.2
Wigmans, E.J.J.M. (Eddy) (1951) Wednesday 5 November 2025 WIN +13.2
Velden van, R. (Rudolf) (1939) Saturday 1 November 2025 DRAW +0.3
Ambrona Navarro, H.A.N. (Himar) (1973) Sunday 26 October 2025 WIN +14.6
Kroon, I. (Ivo) (2015) Sunday 26 October 2025 LOSS -9.0