AK

Ad Koolen

Rated since January 2023

1612 Classic
1612 Rapid
1612 Blitz

RIVALRY

Nemesis
Rijkhoek, H. (Harro)
Games: 3 · Win rate: 33%

The good & the bad

Best wins
FERFERS, J. (JACQUES) 1718
9647 SOS Competitie 2024/2025 2024-10 · Monday 14 October 2024
LINDE TE, J. (JOHAN) 1706
9649 SOS Competitie 2024/2025 2024-12 · Wednesday 11 December 2024
LAM 'T, S. (SANDER) 1564
9653 SOS Competitie 2024/2025 2025-04 · Wednesday 16 April 2025
MAAS, E.H.M. (BERT) 1447
8101 SOS Competitie 2023/2024 April 2024 · Friday 19 April 2024
RIJKHOEK, H. (HARRO) 1395
6846 SOS Competitie 2022/2023 Maart 2023(K3) · Monday 13 March 2023
Worst losses
NUWENHOUD, R.G.M. (RENS) 1240
7605 SOS Competitie 2023/2024 November 2023 · Thursday 9 November 2023
LOTRINGEN VAN, T.J.M. (THEO) 1249
7030 SOS Competitie 2022/2023 April 2023(K3) · Friday 14 April 2023
KUIJK VAN, A.H.J. (ANDRÉ) 1472
5711 SOS Competitie 2022/2023 December 2022 · Wednesday 7 December 2022
EIJK VAN, D. (DRIES) 1650
7604 SOS Competitie 2023/2024 Oktober 2023 · Friday 6 October 2023
UIJTHOF, H. (HENK) 1662
12052 SOS competitie 2025/2026 Lijst 1 Dec · Tuesday 11 November 2025
No FIDE-rated tournaments found.
SOS competitie 2025/2026 Lijst 1 apr Monday 1 September 2025 +0–0=2 +0.7
SOS competitie 2025/2026 Lijst 1 mrt Monday 1 September 2025 +0–1=0 -11.6
SOS competitie 2025/2026 Lijst 1 feb Monday 1 September 2025 +0–1=0 -15.1
SOS competitie 2025/2026 Lijst 1 jan Monday 1 September 2025 +0–1=0 -9.1
SOS competitie 2025/2026 Lijst 1 Dec Monday 1 September 2025 +0–1=0 -20.1
SOS competitie 2025/2026 Lijst 1 Nov Monday 1 September 2025 +0–0=1 -1.8
SOS Competitie 2024/2025 2025-05 Sunday 1 September 2024 +0–1=0 -19.8
SOS Competitie 2024/2025 2025-04 Sunday 1 September 2024 +1–0=0 +14.5
SOS Competitie 2024/2025 2025-03 Sunday 1 September 2024 +0–1=0 -12.0
SOS Competitie 2024/2025 2025-02 Sunday 1 September 2024 +0–0=1 +0.6
SOS Competitie 2024/2025 2025-01 Sunday 1 September 2024 +1–0=0
SOS Competitie 2024/2025 2024-12 Sunday 1 September 2024 +1–0=0 +24.7
SOS Competitie 2024/2025 2024-10 Sunday 1 September 2024 +1–0=1 +21.3
SOS Competitie 2023/2024 April 2024 Friday 1 September 2023 +1–1=0 -3.8
SOS Competitie 2023/2024 Maart 2024 Friday 1 September 2023 +0–1=0 -19.5
SOS Competitie 2023/2024 Februari 2024 Friday 1 September 2023 +0–0=1 -5.4
SOS Competitie 2023/2024 Januari 2024 Friday 1 September 2023 +1–0=0
SOS Competitie 2023/2024 December 2023 Friday 1 September 2023 +0–0=1 +6.2
SOS Competitie 2023/2024 November 2023 Friday 1 September 2023 +0–1=0 -43.3
SOS Competitie 2023/2024 Oktober 2023 Friday 1 September 2023 +0–1=0 -16.7
SOS Competitie 2022/2023 April 2023(K3) Monday 12 September 2022 +0–1=0 -49.2
SOS Competitie 2022/2023 Maart 2023(K3) Monday 12 September 2022 +1–0=0 +19.1
SOS Competitie 2022/2023 Februari 2023 Monday 12 September 2022 +0–0=1 +5.8
SOS Competitie 2022/2023 Januari 2023 Monday 12 September 2022 +0–0=1 -0.2
SOS Competitie 2022/2023 December 2022 Monday 12 September 2022 +0–1=0 -43.0

Rating History

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Peak Ratings

Classic 1690 May 1, 2025
Rapid 1612 March 1, 2026
Blitz 1612 March 1, 2026

Games

Wins 7
Losses 12
Draws 9
Win Rate 25%

Performance by Color

Color Wins Draws Losses Win Rate
White 3 2 4 33%
Black 4 7 8 21%

Recent Matches

Dijkman, J.G. (Hans) (1619) Monday 9 March 2026 DRAW +0.4
Dijkman, J.G. (Hans) (1619) Monday 9 March 2026 DRAW +0.4
Grotenhuis, G.H. (Gerard) (1767) Wednesday 4 February 2026 LOSS -11.6
Agtmaal van, R.C.I. (Rolf) (1729) Monday 12 January 2026 LOSS -15.1
Andringa, I.T. (Ivo) (1878) Wednesday 26 November 2025 LOSS -9.1
Uijthof, H. (Henk) (1662) Tuesday 11 November 2025 LOSS -20.1
Rijkhoek, H. (Harro) (1638) Wednesday 1 October 2025 DRAW -1.8
Schurink, H. (Harry) (1701) Thursday 8 May 2025 LOSS -19.8
Lam 't, S. (Sander) (1564) Wednesday 16 April 2025 WIN +14.5
Haveman, W.J. (Joost) (1851) Monday 17 March 2025 LOSS -12.0
Goedhart, E. (Eric) (1697) Wednesday 12 February 2025 DRAW +0.6
Doornekamp, C. (Chris) Wednesday 22 January 2025 WIN
Linde te, J. (Johan) (1706) Wednesday 11 December 2024 WIN +24.7
Ferfers, J. (Jacques) (1718) Monday 14 October 2024 WIN +27.9
Meulenbroek, L.F.P. (Leo) (1536) Wednesday 25 September 2024 DRAW -6.6
Maas, E.H.M. (Bert) (1447) Friday 19 April 2024 WIN +11.8
Ebskamp, L. (Bart) (1776) Wednesday 3 April 2024 LOSS -15.6
Goedhart, E. (Eric) (1742) Thursday 14 March 2024 LOSS -19.5
Rijkhoek, H. (Harro) (1368) Wednesday 7 February 2024 DRAW -5.4
Oudendijk, J.J. (Jarno) Monday 15 January 2024 WIN