KNSB FIDE
PA

Piet Aardenburg

Rated since January 2023

1819 Classic

RIVALRY

Nemesis
Stapel, A. (Arend)
Games: 4 · Win rate: 50%
Kryptonite
Heertjes, M. (Marc)
Games: 5 · Win rate: 40%

The good & the bad

Best wins
HOLSCHER, P.A.C. (PETER) 1941
12827 Caïssa-Eenhoorn interne competitie 13-01-2026 t/m 13-01-2026 (090008) · Tuesday 13 January 2026
VRIES DE, J. (HANS) 1821
11957 Caïssa-Eenhoorn interne competitie 30-09-2025 t/m 30-09-2025 (090008) · Tuesday 30 September 2025
DIJK VAN, T. (TON) 1816
12532 Caïssa-Eenhoorn interne competitie 02-12-2025 t/m 02-12-2025 (090008) · Tuesday 2 December 2025
WAART DE, S.C. (STEVEN) 1798
12369 Caïssa-Eenhoorn interne competitie 18-11-2025 t/m 18-11-2025 (090008) · Tuesday 18 November 2025
SPIER, R. (ROEL) 1773
8283 Tata Steel Chess Tournament 2025 Weekendvierkampen · Friday 17 January 2025
Worst losses
DOUMA, R.D. (RINZE) 1426
7941 Interne competitie Caïssa-Eenhoorn 2023-2024 T/m november · Tuesday 31 October 2023
HEERTJES, M. (MARC) 1515
8754 Interne competitie Caïssa-Eenhoorn 2023-2024 T/m maart · Tuesday 27 February 2024
WOLFF VAN DER, A. (ARNOLD) 1652
8339 Interne competitie Caïssa-Eenhoorn 2023-2024 T/m januari · Tuesday 23 January 2024
ZYAT, J. (JAMAL) 1712
10003 Interne competitie Caïssa-Eenhoorn 2024-2025 T/m november · Tuesday 12 November 2024
BEST DE, B. (BORIS) 1834
11881 Interne competitie Caïssa-Eenhoorn 2025-2026 2025-09-23 · Tuesday 23 September 2025
Tata Steel Chess Tournament 2025 Weekendvierkampen Friday 17 January 2025 +1–0=2 +13.3
Caïssa-Eenhoorn interne competitie 21-04-2026 t/m 21-04-2026 (090008) Monday 1 September 2025 +1–0=0 +8.3
Caïssa-Eenhoorn interne competitie 14-04-2026 t/m 14-04-2026 (090008) Monday 1 September 2025 +0–0=1 -5.3
Caïssa-Eenhoorn interne competitie 07-04-2026 t/m 07-04-2026 (090008) Monday 1 September 2025 +0–1=0 -11.3
Caïssa-Eenhoorn interne competitie 31-03-2026 t/m 31-03-2026 (090008) Monday 1 September 2025 +1–0=0 +8.3
Caïssa-Eenhoorn interne competitie 10-03-2026 t/m 10-03-2026 (090008) Monday 1 September 2025 +2–0=0 +19.4
Caïssa-Eenhoorn interne competitie 17-02-2026 t/m 17-02-2026 (090008) Monday 1 September 2025 +0–1=0 -2.5
Caïssa-Eenhoorn interne competitie 03-02-2026 t/m 03-02-2026 (090008) Monday 1 September 2025 +0–1=0 -8.3
Caïssa-Eenhoorn interne competitie 27-01-2026 t/m 27-01-2026 (090008) Monday 1 September 2025 +1–0=0 +10.9
Caïssa-Eenhoorn interne competitie 13-01-2026 t/m 13-01-2026 (090008) Monday 1 September 2025 +1–0=0 +17.5
Caïssa-Eenhoorn interne competitie 09-12-2025 t/m 09-12-2025 (090008) Monday 1 September 2025 +0–0=1 -2.0
Caïssa-Eenhoorn interne competitie 02-12-2025 t/m 02-12-2025 (090008) Monday 1 September 2025 +1–0=0 +13.8
Caïssa-Eenhoorn interne competitie 18-11-2025 t/m 18-11-2025 (090008) Monday 1 September 2025 +1–0=0 +13.5
Caïssa-Eenhoorn interne competitie 11-11-2025 t/m 11-11-2025 (090008) Monday 1 September 2025 +1–0=0 +5.6
Caïssa-Eenhoorn interne competitie 07-10-2025 t/m 07-10-2025 (090008) Monday 1 September 2025 +0–0=1 -8.3
Caïssa-Eenhoorn interne competitie 30-09-2025 t/m 30-09-2025 (090008) Monday 1 September 2025 +1–0=0 +14.0
Interne competitie Caïssa-Eenhoorn 2025-2026 2025-09-23 Monday 1 September 2025 +0–1=0 -10.6
Interne competitie Caïssa-Eenhoorn 2025-2026 2025-09-16 Monday 1 September 2025 +0–1=0 -5.8
Interne competitie Caïssa-Eenhoorn 2025-2026 2025-09-09 Monday 1 September 2025 +0–1=0 -7.4
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-05-20 Sunday 1 September 2024 +0–0=1 +1.0
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-05-13 Sunday 1 September 2024 +1–0=0 +4.6
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-05-06 Sunday 1 September 2024 +0–0=1 -1.1
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-04-15 Sunday 1 September 2024 +0–0=1
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-04-01 Sunday 1 September 2024 +0–0=1 -0.5
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-03-25 Sunday 1 September 2024 +1–0=0 +5.7
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-03-18 Sunday 1 September 2024 +0–0=1 -5.1
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-02-04 Sunday 1 September 2024 +1–0=0 +5.4
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-01-21 Sunday 1 September 2024 +0–0=1 +1.1
Interne competitie Caïssa-Eenhoorn 2024-2025 2025-01-14 Sunday 1 September 2024 +0–0=1 +1.5
Interne competitie Caïssa-Eenhoorn 2024-2025 T/m november Sunday 1 September 2024 +0–1=2 -13.7
Interne competitie Caïssa-Eenhoorn 2024-2025 T/m oktober Sunday 1 September 2024 +0–0=3 -4.4
Interne competitie Caïssa-Eenhoorn 2024-2025 T/m september Sunday 1 September 2024 +0–1=0 -7.7
XX Open Internacional Amateur de Calvia Saturday 7 October 2023 +2–4=0 -13.4
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m mei Friday 1 September 2023 +0–1=0 -5.4
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m april Friday 1 September 2023 +0–0=2 -3.0
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m maart Friday 1 September 2023 +2–1=2 -11.0
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m februari Friday 1 September 2023 +0–0=1 -5.8
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m januari Friday 1 September 2023 +0–1=0 -13.6
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m december Friday 1 September 2023 +1–0=0 +5.7
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m november Friday 1 September 2023 +2–1=0 -13.1
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m oktober Friday 1 September 2023 +1–0=1 +1.0
Interne competitie Caïssa-Eenhoorn 2023-2024 T/m september Friday 1 September 2023 +0–1=1 -6.3

Rating History

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Peak Ratings

Classic 1820 Feb. 1, 2026
Rapid 1819 May 1, 2026
Blitz 1819 May 1, 2026

Games

Wins 22
Losses 17
Draws 24
Win Rate 35%

Performance by Color

Color Wins Draws Losses Win Rate
White 10 14 7 32%
Black 12 10 10 38%

Recent Matches

Druijf, W.J. (Wout) (1695) Tuesday 21 April 2026 WIN +8.3
Bravenboer, R. (Remco) (1660) Tuesday 14 April 2026 DRAW -5.3
Krol van de, S.T. (Sernin) (1854) Tuesday 7 April 2026 LOSS -11.3
Baank, M.A.R.C. (Marc) (1685) Tuesday 31 March 2026 WIN +8.3
Stapel, A. (Arend) (1728) Tuesday 10 March 2026 WIN +9.7
Stapel, A. (Arend) (1728) Tuesday 10 March 2026 WIN +9.7
Manshanden, N.M. (Nick) (2185) Tuesday 17 February 2026 LOSS -2.5
Kelder, S. (Sjoerd) (1945) Tuesday 3 February 2026 LOSS -8.3
Heertjes, M. (Marc) (1745) Tuesday 27 January 2026 WIN +10.9
Holscher, P.A.C. (Peter) (1941) Tuesday 13 January 2026 WIN +17.5
Groenendijk, C. (Cees) (1721) Tuesday 9 December 2025 DRAW -2.0
Dijk van, T. (Ton) (1816) Tuesday 2 December 2025 WIN +13.8
Waart de, S.C. (Steven) (1798) Tuesday 18 November 2025 WIN +13.5
Veen van der, W. (Willem) (1553) Tuesday 11 November 2025 WIN +5.6
Best de, H. (Harry) (1482) Tuesday 7 October 2025 DRAW -8.3
Vries de, J. (Hans) (1821) Tuesday 30 September 2025 WIN +14.0
Best de, B. (Boris) (1834) Tuesday 23 September 2025 LOSS -10.6
Waert van, J.J.P. (Peter) (1989) Tuesday 16 September 2025 LOSS -5.8
Kelder, S. (Sjoerd) (1932) Tuesday 9 September 2025 LOSS -7.4
Heertjes, M. (Marc) (1803) Tuesday 20 May 2025 DRAW +1.0