KNSB FIDE
MG

Mark Grondsma

Rated since January 2023

2099 Classic
2040 Rapid
2097 Blitz

RIVALRY

Nemesis
Kempen van, R.P.D. (Roderick)
Games: 4 · Win rate: 50%

The good & the bad

Best wins
BEKEDAM, T. (TYRO) 2172
7578 KNSB competitie 2023-2024 Klasse 2 ronde 1 · Saturday 16 September 2023
STRAVER, R. (ROBERT) 2135
6418 Tata Steel Chess Tournament 2023 Tienkampen · Tuesday 24 January 2023
KAMPHUIS, J. (JASPER) 2125
9797 KNSB competitie 2024-2025 Klasse 2 ronde 3 · Saturday 9 November 2024
BROUWER, M. (MASON) 2102
7463 Amsterdam Science Park Schaaktoernooi Dagvierkampen · Tuesday 18 July 2023
BLOK, S. (SANDER) 2088
7604 SOS Competitie 2023/2024 Oktober 2023 · Tuesday 3 October 2023
Worst losses
VENEMA, K.L. (KATJA) 1866
12850 LeiSB regionale competitie 25-26 1e klasse januari 2026 · Tuesday 6 January 2026
NOBEL, C. (CORNIEL) 1910
10537 HSB competitie 2024-2025 CompFeb2025 · Monday 17 February 2025
REE VAN, T.K.P.C. (THAILO) 1925
9653 SOS Competitie 2024/2025 2025-04 · Wednesday 16 April 2025
HOOP DE, S. (SIPKE) 1938
11250 KNSB competitie 2024-2025 Klasse 2 ronde 9 · Saturday 10 May 2025
OOSTEN VAN, A. (AREND) 1994
8099 SOS Competitie 2023/2024 Februari 2024 · Monday 5 February 2024
Tata Steel Chess Tournament 2026 Tienkampen Friday 16 January 2026 +10–0=6 +76.0
Tata Steel Chess Tournament 2025 Dagvierkampen Friday 17 January 2025 +1–0=0 +7.8
Tata Steel Chess Tournament 2024 Tienkampen Friday 12 January 2024 +0–4=2 -52.7
Amsterdam Science Park Schaaktoernooi Dagvierkampen Saturday 15 July 2023 +1–1=1 +5.6
Tata Steel Chess Tournament 2023 Tienkampen Friday 13 January 2023 +2–4=3 -35.8
LeiSB bekercompetitie 25-26 Beker A ronde 1.2 Saturday 1 November 2025 +2–0=0 +22.2
LeiSB bekercompetitie 25-26 Beker A ronde 1.1 Saturday 1 November 2025 +0–2=0 -27.8
LeiSB regionale competitie 25-26 1e klasse april Wednesday 1 October 2025 +1–0=0 +2.6
LeiSB regionale competitie 25-26 1e klasse maart Wednesday 1 October 2025 +0–0=2 -11.5
LeiSB regionale competitie 25-26 1e klasse januari 2026 Wednesday 1 October 2025 +0–1=0 -18.6
LeiSB regionale competitie 25-26 1e klasse december Wednesday 1 October 2025 +1–0=0 +6.3
LeiSB regionale competitie 25-26 1e klasse november Wednesday 1 October 2025 +1–0=0 +7.8
LeiSB regionale competitie 25-26 1e klasse oktober Wednesday 1 October 2025 +1–0=0 +5.4
KNSB competitie 2025-2026 Klasse 2 ronde 9 Saturday 20 September 2025 +0–0=1 -0.5
KNSB competitie 2025-2026 Klasse 2 ronde 6 Saturday 20 September 2025 +0–0=1 +7.6
KNSB competitie 2025-2026 Klasse 2 ronde 8 Saturday 20 September 2025 +1–0=0 +10.3
KNSB competitie 2025-2026 Klasse 2 ronde 7 Saturday 20 September 2025 +2–0=0 +19.5
KNSB competitie 2025-2026 Klasse 2 ronde 5 Saturday 20 September 2025 +0–1=0 -10.3
KNSB competitie 2025-2026 Klasse 2 Ronde 4 Saturday 20 September 2025 +0–1=0 -13.6
KNSB competitie 2025-2026 Klasse 2 ronde 3 Saturday 20 September 2025 +0–1=0 -15.3
KNSB competitie 2025-2026 Klasse 2 ronde 2 Saturday 20 September 2025 +0–1=0 -12.8
KNSB competitie 2025-2026 Klasse 2 ronde 1 Saturday 20 September 2025 +0–0=1 -2.4
HSB competitie 2025-2026 DecemberJanuari Comp 2526 Monday 1 September 2025 +1–0=0 +7.1
HSB competitie 2025-2026 November comp Monday 1 September 2025 +0–0=1 +1.0
HSB competitie 2025-2026 November beker H Monday 1 September 2025 +0–1=0 -8.7
HSB competitie 2025-2026 October 2025 Monday 1 September 2025 +0–0=1 +0.7
HSB competitie 2025-2026 September 2025 Monday 1 September 2025 +1–0=0 +3.0
KNSB competitie 2024-2025 Klasse 2 ronde 9 Saturday 21 September 2024 +0–1=0 -17.8
KNSB competitie 2024-2025 Klasse 2 ronde 7 Saturday 21 September 2024 +0–0=1 -5.8
KNSB competitie 2024-2025 Klasse 2 ronde 6 Saturday 21 September 2024 +0–1=0 -9.2
KNSB competitie 2024-2025 Klasse 2 ronde 5 Saturday 21 September 2024 +0–0=1 -1.9
KNSB competitie 2024-2025 Klasse 2 ronde 4 Saturday 21 September 2024 +1–0=0 +7.6
KNSB competitie 2024-2025 Klasse 2 ronde 3 Saturday 21 September 2024 +1–0=0 +13.8
KNSB competitie 2024-2025 Klasse 2 ronde 2 Saturday 21 September 2024 +0–0=1 -1.5
KNSB competitie 2024-2025 Klasse 2 ronde 1 Saturday 21 September 2024 +0–1=0 -14.5
HSB competitie 2024-2025 Finale beker hoofdklasse Sunday 1 September 2024 +0–1=0 -4.7
HSB competitie 2024-2025 Comp april Sunday 1 September 2024 +2–0=0 +10.1
SOS Competitie 2024/2025 2025-04 Sunday 1 September 2024 +0–1=0 -18.1
HSB competitie 2024-2025 Beker april Sunday 1 September 2024 +1–0=0 +10.9
HSB competitie 2024-2025 CompFeb2025 Sunday 1 September 2024 +0–1=0 -18.1
HSB competitie 2024-2025 Beker hoofdklasse januari Sunday 1 September 2024 +1–0=0 +9.3
HSB competitie 2024-2025 CompDecember2024 Sunday 1 September 2024 +1–0=0 +7.7
HSB competitie 2024-2025 BekerhoofdklasseNov Sunday 1 September 2024 +1–0=0 +8.5
HSB competitie 2024-2025 CompNovember2024 Sunday 1 September 2024 +1–0=0 +3.6
HSB competitie 2024-2025 Groep A Sunday 1 September 2024 +1–0=1 -0.4
50e VIERKAMPTOERNOOI S.C. DE UIL HILLEGOM Groep 1 Friday 7 June 2024 +0–1=0 -10.0
HSB competitie 2023-2024 Competitie april Monday 18 September 2023 +1–0=0 +7.3
HSB competitie 2023-2024 Competitie maart Monday 18 September 2023 +1–0=0 +7.1
KNSB competitie 2023-2024 Klasse 2 ronde 9 Saturday 16 September 2023 +0–0=1 -4.4
KNSB competitie 2023-2024 Klasse 2 ronde 8 Saturday 16 September 2023 +1–0=0 +9.9
KNSB competitie 2023-2024 Klasse 2 ronde 6 Saturday 16 September 2023 +1–0=0 +4.5
KNSB competitie 2023-2024 Klasse 2 ronde 5 Saturday 16 September 2023 +0–0=1 -1.7
KNSB competitie 2023-2024 Klasse 2 ronde 4 Saturday 16 September 2023 +1–0=0 +6.3
KNSB competitie 2023-2024 Klasse 2 ronde 3 Saturday 16 September 2023 +0–1=0 -8.8
KNSB competitie 2023-2024 Klasse 2 ronde 2 Saturday 16 September 2023 +0–1=0 -1.7
KNSB competitie 2023-2024 Klasse 2 ronde 1 Saturday 16 September 2023 +1–0=0 +13.7
SOS Competitie 2023/2024 Mei 2024 Friday 1 September 2023 +1–0=0 +7.9
SOS Competitie 2023/2024 Maart 2024 Friday 1 September 2023 +1–0=0 +9.1
SOS Competitie 2023/2024 Februari 2024 Friday 1 September 2023 +0–1=0 -16.0
SOS Competitie 2023/2024 Januari 2024 Friday 1 September 2023 +0–0=1 +1.3
SOS Competitie 2023/2024 December 2023 Friday 1 September 2023 +1–0=0 +6.3
SOS Competitie 2023/2024 Oktober 2023 Friday 1 September 2023 +1–0=0 +10.4
SOS Competitie 2023/2024 September 2023 Friday 1 September 2023 +0–0=1 -3.8
Amsterdam Science Park 2023 Weekendvierkampen Friday 21 July 2023 +0–0=3 -1.8
KNSB competitie 2022-2023 Klasse 2 ronde 9 Saturday 17 September 2022 +0–0=1 +0.2
KNSB competitie 2022-2023 Klasse 2 ronde 8 Saturday 17 September 2022 +0–0=1 -7.9
KNSB competitie 2022-2023 Klasse 2 ronde 7 Saturday 17 September 2022 +0–0=1 +0.5
KNSB competitie 2022-2023 Klasse 2 ronde 6 Saturday 17 September 2022 +1–0=0 +8.8
KNSB competitie 2022-2023 Klasse 2 ronde 5 Saturday 17 September 2022 +1–0=0 +8.0
KNSB competitie 2022-2023 Klasse 2 ronde 4 Saturday 17 September 2022 +0–0=1 +0.3
SOS Competitie 2022/2023 Mei Monday 12 September 2022 +1–0=0 +7.9
SOS Competitie 2022/2023 April 2023(HK) Monday 12 September 2022 +1–0=0 +2.9
SOS Competitie 2022/2023 Maart 2023(HK) Monday 12 September 2022 +0–0=1 +2.2
SOS Competitie 2022/2023 Februari 2023 Monday 12 September 2022 +1–0=0 +4.4
SOS Competitie 2022/2023 Januari 2023 Monday 12 September 2022 +0–0=1 -0.4
SOS Competitie 2022/2023 December 2022 Monday 12 September 2022 +0–0=1 +0.1

Rating History

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Peak Ratings

Classic 2145 Feb. 1, 2025
Rapid 2040 March 1, 2026
Blitz 2097 April 1, 2026

Games

Wins 50
Losses 27
Draws 37
Win Rate 44%

Performance by Color

Color Wins Draws Losses Win Rate
White 25 19 11 45%
Black 25 18 16 42%

Recent Matches

Rood, I.D.C. (Ignace) (1735) Tuesday 21 April 2026 WIN +2.6
Ercan, S. (Selman) (2083) Saturday 11 April 2026 DRAW -0.5
IM Assendelft van, F.W. (Floris) (2337) Saturday 28 March 2026 DRAW +7.6
Veldhuyzen, Y. (Ywein) (1900) Tuesday 24 March 2026 DRAW -6.2
Pauptit, A.L.J. (Alwin) (2028) Saturday 7 March 2026 WIN +10.3
Binnendijk, D.C.W. (Daan) (1883) Friday 27 February 2026 DRAW -5.3
Postma, J. (Jan) (1963) Saturday 7 February 2026 WIN +9.7
Postma, J. (Jan) (1963) Saturday 7 February 2026 WIN +9.7
Albers, M.M. (Merlijn) (1985) Sunday 1 February 2026 WIN +10.1
Albers, M.M. (Merlijn) (1985) Sunday 1 February 2026 WIN +10.1
Mohtaat, H. (Homayoun) (1968) Friday 30 January 2026 WIN +9.5
Mohtaat, H. (Homayoun) (1968) Friday 30 January 2026 WIN +9.5
Bouton, Christophe (1895) Wednesday 28 January 2026 DRAW -5.3
Bouton, Christophe (1895) Wednesday 28 January 2026 DRAW -5.3
FM Etmans, M.D. (Maarten) (1934) Tuesday 27 January 2026 DRAW -4.1
FM Etmans, M.D. (Maarten) (1934) Tuesday 27 January 2026 DRAW -4.1
Kerkhoven, R.H.H.W. (Roy) (2006) Monday 26 January 2026 WIN +10.8
Kerkhoven, R.H.H.W. (Roy) (2006) Monday 26 January 2026 WIN +10.8
Gergin, I. (Isafara) (2007) Sunday 25 January 2026 WIN +10.9
Gergin, I. (Isafara) (2007) Sunday 25 January 2026 WIN +10.9