KNSB FIDE
CR

Cas Roorda

Rated since January 2023

2082 Classic
2074 Rapid
2082 Blitz

RIVALRY

Nemesis
Ambrona Navarro, H.A.N. (Himar)
Games: 4 · Win rate: 50%
Kryptonite
Sparenberg, E. (Erik)
Games: 12 · Win rate: 0%
Easy Target
Jonkman, F.H.M. (Fokke)
Games: 3 · Win rate: 100%

The good & the bad

Best wins
JONG DE, M. (MIGCHIEL) (IM) 2263
9103 Philidor 1847 play-off 2024 Groep A · Tuesday 21 May 2024
SPRANGERS, R. (REMCO) (CM) 2201
8804 KNSB competitie 2023-2024 Klasse 1 ronde 9 · Saturday 20 April 2024
HANIA, J. (JAN) 2181
9666 K.S.C. Philidor 1847 interne competitie 01-10-2024 t/m 22-10-2024 (010026) · Tuesday 15 October 2024
KUMMEROW, HEIKO (FM) 2156
8283 Tata Steel Chess Tournament 2025 Weekendvierkampen · Friday 17 January 2025
PLASMAN, J.A. (HANS) 2141
11019 KNSB competitie 2024-2025 Klasse 2 ronde 8 · Saturday 5 April 2025
Worst losses
FREDERIKS, J. (JESSE) 1510
7199 NJSK C jeugd · Monday 1 May 2023
GERGIN, I. (ISAFARA) 1537
6254 Chess Festival Groningen Mini · Thursday 22 December 2022
HENCKENS, E. (ELOF) 1547
7864 Kwalificatie 1 NK ABC B groep · Saturday 18 November 2023
STEGEMAN, D. (DERK) 1565
6324 K.S.C. Philidor 1847 interne competitie 30-11-2022 t/m 20-12-2022 (010026) · Wednesday 14 December 2022
OKITA, S. (SHINSAKU) 1680
7864 Kwalificatie 1 NK ABC B groep · Sunday 19 November 2023
Tata Steel Chess Tournament 2025 Weekendvierkampen Friday 17 January 2025 +2–1=0 +27.8
Chess Festival Groningen Vierkampen Saturday 21 December 2024 +1–1=1 +0.0
Chess Festival Groningen Vierkampen Thursday 21 December 2023 +4–0=2 +53.8
FK Rapid voor teams 2025 - Saturday 22 March 2025 +6–0=1 +64.4
K.S.C. Philidor 1847 interne competitie 27-05-2025 t/m 27-05-2025 (0… Monday 3 March 2025 +1–0=0 +20.2
K.S.C. Philidor 1847 interne competitie 04-03-2025 t/m 21-05-2025 (0… Monday 3 March 2025 +5–1=0 +79.7
Kwalificatie NK ABC 3 Groep B Saturday 22 February 2025 +3–2=2 -44.3
NOSBO JCC Maart 2025 Wednesday 1 January 2025 +1–0=0 +9.6
KNSB-Jeugdclubcompetitie 4, AC Groep A en C Saturday 7 December 2024 +0–1=0 -29.2
KNSB-Jeugdclubcompetitie 2, AC Groep A Saturday 5 October 2024 +1–0=0 +13.1
KNSB competitie 2024-2025 Klasse 2 ronde 9 Saturday 21 September 2024 +0–1=0 -14.4
KNSB competitie 2024-2025 Klasse 2 ronde 8 Saturday 21 September 2024 +1–0=0 +28.3
KNSB competitie 2024-2025 Klasse 2 ronde 7 Saturday 21 September 2024 +1–0=0 +18.2
KNSB competitie 2024-2025 Klasse 2 ronde 6 Saturday 21 September 2024 +1–0=0 +15.2
KNSB competitie 2024-2025 Klasse 2 ronde 5 Saturday 21 September 2024 +0–1=0 -32.6
KNSB competitie 2024-2025 Klasse 2 ronde 4 Saturday 21 September 2024 +1–0=0 +14.3
KNSB competitie 2024-2025 Klasse 2 ronde 3 Saturday 21 September 2024 +0–1=0 -28.1
KNSB competitie 2024-2025 Klasse 2 ronde 2 Saturday 21 September 2024 +0–0=1 +2.5
KNSB competitie 2024-2025 Klasse 2 ronde 1 Saturday 21 September 2024 +0–0=1 -0.6
K.S.C. Philidor 1847 interne competitie 28-01-2025 t/m 18-02-2025 (0… Monday 9 September 2024 +1–1=1 -17.1
K.S.C. Philidor 1847 interne competitie 07-01-2025 t/m 14-01-2025 (01… Monday 9 September 2024 +1–0=1 +9.4
K.S.C. Philidor 1847 interne competitie 03-12-2024 t/m 17-12-2024 (0… Monday 9 September 2024 +0–0=1 -3.7
K.S.C. Philidor 1847 interne competitie 29-10-2024 t/m 19-11-2024 (010026) Monday 9 September 2024 +1–1=1 +2.0
K.S.C. Philidor 1847 interne competitie 01-10-2024 t/m 22-10-2024 (010026) Monday 9 September 2024 +1–0=0 +27.2
K.S.C. Philidor 1847 interne competitie 10-09-2024 t/m 24-09-2024 (010026) Monday 9 September 2024 +2–0=1 +42.1
FSB-competitie 24-25 ronde 7 hoofdklasse Sunday 1 September 2024 +0–1=0 -17.4
FSB-competitie 24-25 ronde 6 hoofdklasse Sunday 1 September 2024 +0–0=1 +3.5
FSB-competitie 24-25 ronde 5 hoofdklasse Sunday 1 September 2024 +0–1=0 -21.3
FSB-competitie 24-25 FSB-beker ronde 3 Sunday 1 September 2024 +0–1=0 -32.3
FSB-competitie 24-25 ronde 4 hoofdklasse Sunday 1 September 2024 +0–1=0 -17.6
FSB-competitie 24-25 FSB-beker ronde 2 Sunday 1 September 2024 +1–0=0 +8.0
FSB-competitie 24-25 ronde 3 hoofdklasse Sunday 1 September 2024 +0–0=1 +5.2
FSB-competitie 24-25 FSB-competitie 24-25 ronde 2 hoofdklasse Sunday 1 September 2024 +0–0=1 -1.3
FSB-competitie 24-25 FSB-beker 24-25 ronde 1 Sunday 1 September 2024 +1–0=0 +4.1
FSB-competitie 24-25 Groep A Sunday 1 September 2024 +1–0=0 +16.7
Fries Kampioenschap Groep A Tuesday 11 June 2024 +8–4=2 +12.6
NJSK Jeugd C Saturday 27 April 2024 +8–8=2 +67.3
Philidor 1847 play-off 2024 Groep A Tuesday 19 March 2024 +4–8=2 +24.1
FKjeugd2024 C Monday 19 February 2024 +5–0=1 +17.3
Kwalificatie NK ABC 3 Jeugd B Saturday 10 February 2024 +3–2=2 -22.3
KNSB-Jeugdclubcompetitie 4, AC Finale A en C Saturday 9 December 2023 +0–2=2 -8.6
Kwalificatie 1 NK ABC B groep Saturday 18 November 2023 +3–3=1 -89.4
Waling Dijkstra Weekendtoernooi Groep A Friday 10 November 2023 +6–4=2 +5.1
NOSBO FSB jeugd 2023-2024 Juni 2024 Wednesday 1 November 2023 +1–0=0 +10.2
KNSB-Jeugdclubcompetitie 2, AC Groep AC Saturday 30 September 2023 +2–2=0 +51.9
KNSB-Jeugdclubcompetitie 1, AC Groep A Saturday 23 September 2023 +2–0=2 -2.9
KNSB competitie 2023-2024 Klasse 1 ronde 9 Saturday 16 September 2023 +2–0=0 +70.0
KNSB competitie 2023-2024 Klasse 3 ronde 8 Saturday 16 September 2023 +0–2=0 -29.1
KNSB competitie 2023-2024 Klasse 3 ronde 7 Saturday 16 September 2023 +2–0=0 +50.3
KNSB competitie 2023-2024 Klasse 1 ronde 5 Saturday 16 September 2023 +0–2=0 -22.8
KNSB competitie 2023-2024 Klasse 1 ronde 3 Saturday 16 September 2023 +0–2=0 -18.3
KNSB competitie 2023-2024 Klasse 3 ronde 2 Saturday 16 September 2023 +0–2=0 -34.2
KNSB competitie 2023-2024 Klasse 3 ronde 1 Saturday 16 September 2023 +0–0=2 -14.7
K.S.C. Philidor 1847 interne competitie 09-01-2024 t/m 23-01-2024 (010026) Tuesday 12 September 2023 +0–0=2 -8.1
K.S.C. Philidor 1847 interne competitie 28-11-2023 t/m 12-12-2023 (010026) Tuesday 12 September 2023 +0–4=2 -30.8
K.S.C. Philidor 1847 interne competitie 31-10-2023 t/m 21-11-2023 (010026) Tuesday 12 September 2023 +0–2=0 -9.5
K.S.C. Philidor 1847 interne competitie 26-09-2023 t/m 24-10-2023 (010026) Tuesday 12 September 2023 +0–2=2 -18.8
K.S.C. Philidor 1847 interne competitie 12-09-2023 t/m 19-09-2023 (010026) Tuesday 12 September 2023 +4–0=0 +82.5
FSB-competitie 23-24 Beker finale correctie Friday 1 September 2023 +0–0=2 +10.2
FSB-competitie 23-24 hoofdklasse ronde 7 Friday 1 September 2023 +2–0=0 +54.1
FSB-competitie 23-24 Beker halve finale Friday 1 September 2023 +2–0=0 +41.8
FSB-competitie 23-24 hoofdklasse ronde 6 Friday 1 September 2023 +0–0=2 +12.3
FSB-competitie 23-24 Beker ronde 3 Friday 1 September 2023 +0–0=2 -31.1
K.S.C. Philidor 1847 interne competitie 30-01-2024 t/m 12-03-2024 (010026) Friday 1 September 2023 +2–0=2 +16.7
FSB-competitie 23-24 hoofdklasse ronde 5 Friday 1 September 2023 +0–2=0 -25.3
FSB-competitie 23-24 Beker ronde 2 Friday 1 September 2023 +0–2=0 -39.9
FSB-competitie 23-24 hoofdklasse ronde 4 Friday 1 September 2023 +0–2=0 -41.6
FSB-competitie 23-24 hoofdklasse ronde 3. Friday 1 September 2023 +0–0=2 +4.8
FSB-competitie 23-24 hoofdklasse ronde 2 Friday 1 September 2023 +0–0=2 -8.2
FSB-competitie 23-24 Beker ronde 1 Friday 1 September 2023 +2–0=0 +23.9
FSB-competitie 23-24 hoofdklasse ronde 1 Friday 1 September 2023 +2–0=0 +34.2
Staunton Grand Pre-Season toernooi Groep A Tuesday 29 August 2023 +4–0=1 -13.3
Fries Kampioenschap Groep A Tuesday 20 June 2023 +6–6=0 -37.9
NJSK C jeugd Friday 21 April 2023 +6–8=4 -132.8
K.S.C. Philidor 1847 interne competitie 04-04-2023 t/m 16-05-2023 (010026) Tuesday 4 April 2023 +4–0=2 +110.1
Lentecompetitie Philidor Groep A Tuesday 7 March 2023 +0–0=6 +10.0
playoffs philidor Ronde 1 t/m n Tuesday 7 March 2023 +2–2=4 +112.6
Fries Kampioenschap Jeugd AB Monday 27 February 2023 +5–0=1 +6.6
82e Noteboomtoernooi Groep B Friday 24 February 2023 +4–4=2 +19.0
NJK kwalificatietoernooi 3 Groep B jeugd Saturday 18 February 2023 +5–0=2 +132.3
NOSBO FSB 2022-2023 NJC- Juni Sunday 1 January 2023 +0–1=0 -14.4
NOSBO FSB 2022-2023 NJC NJC - April Sunday 1 January 2023 +1–0=0 +0.1
NOSBO FSB 2022-2023 NJC NJC - Maart Sunday 1 January 2023 +1–0=0 +5.4
NOSBO FSB 2022-2023 NJC NJC - Februari Sunday 1 January 2023 +1–0=0 +8.3
Chess Festival Groningen Mini Wednesday 21 December 2022 +2–2=2 -16.4
K.S.C. Philidor 1847 interne competitie 30-11-2022 t/m 20-12-2022 (010026) Sunday 27 November 2022 +0–8=0 -137.6
FSB competitie 22-23 ronde 7 Saturday 1 October 2022 +2–0=0 +49.7
FSB competitie 22-23 ronde 6 Saturday 1 October 2022 +0–0=2 +23.5
FSB competitie 22-23 Beker ronde 2 Saturday 1 October 2022 +0–0=2 +20.4
FSB competitie 22-23 ronde 5 Saturday 1 October 2022 +2–0=0
KNSB-Jeugdclubcompetitie 2, AC+D halve finales Meesterklasse A en C Saturday 1 October 2022 +2–0=0 +71.8
KNSB competitie 2022-2023 Klasse 4 ronde 9 Saturday 17 September 2022 +0–2=0 -33.8
KNSB competitie 2022-2023 Klasse 4 ronde 8 Saturday 17 September 2022 +2–0=0 +27.9
KNSB competitie 2022-2023 Klasse 4 ronde 6 Saturday 17 September 2022 +0–0=2 +5.2
KNSB competitie 2022-2023 Klasse 4 ronde 5 Saturday 17 September 2022 +0–0=2 -14.1
KNSB competitie 2022-2023 Klasse 4 ronde 4 Saturday 17 September 2022 +0–2=0 -28.8
K.S.C. Philidor 1847 interne competitie 27-12-2022 t/m 21-02-2023 (010026) Tuesday 13 September 2022 +2–4=4 -3.1
K.S.C. Philidor 1847 interne competitie 02-11-2022 t/m 23-11-2022 (010026) Tuesday 13 September 2022 +0–0=4 +11.5

Rating History

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Peak Ratings

Classic 2109 Nov. 1, 2024
Rapid 2074 April 1, 2025
Blitz 2082 March 1, 2026

Games

Wins 148
Losses 109
Draws 92
Win Rate 42%

Performance by Color

Color Wins Draws Losses Win Rate
White 83 44 49 47%
Black 65 48 60 38%

Recent Matches

Boer de, R. (Rein) (2000) Tuesday 27 May 2025 WIN +20.2
IM Jong de, M. (Migchiel) (2264) Wednesday 21 May 2025 LOSS -7.0
CM Buendgen, A. (Achim) (2099) Saturday 10 May 2025 LOSS -14.4
FM Etmans, M.D. (Maarten) (2011) Tuesday 6 May 2025 WIN +20.8
Visser, M. (Mathijs) (1943) Tuesday 15 April 2025 WIN +17.6
Lemstra, B. (Bart) (2032) Tuesday 8 April 2025 LOSS -17.4
Plasman, J.A. (Hans) (2141) Saturday 5 April 2025 WIN +28.3
Heide van der, A. (Auke) (1983) Tuesday 1 April 2025 WIN +19.8
Kruit, E.A. (Erik) (1904) Tuesday 25 March 2025 WIN +13.2
Meppelink, G. (Gerrit) (1750) Saturday 22 March 2025 WIN +7.6
Nolles, D.S. (Dirk Sieds) (1898) Saturday 22 March 2025 WIN +14.4
Viersma, M. (Murk) (1985) Saturday 22 March 2025 WIN +19.2
Meindersma, T. (Teun) (1810) Saturday 22 March 2025 WIN +10.1
Veen van der, R. (Ronald) (1924) Saturday 22 March 2025 DRAW -4.2
Kooi van der, A. (Aat) (1892) Saturday 22 March 2025 WIN +14.1
Bosma, P.G. (Pieter) (1597) Saturday 22 March 2025 WIN +3.2
Stavast, D.W. (Dick) (2094) Tuesday 18 March 2025 DRAW +3.5
Pastoor, E.J. (Ernst-Jan) (1998) Saturday 8 March 2025 WIN +18.2
Schriemer, O. (Oene) (1944) Tuesday 4 March 2025 WIN +15.3
Kolijn, D. (David) (1799) Friday 28 February 2025 WIN +9.6