KNSB FIDE

Thomas Ammerlaan

Rated since January 2023

2022 Classic

1946 Rapid

1766 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins

HOLLANDER, J.W. (HANS) 2101

10057 39ste Open Schaakkampioenschap van Spijkenisse Groep A · Saturday 29 November 2025

HIDDE VAN DER, C.J.M. (MARTIN) 1981

13446 RSB Competitie 2025-2026 Achttallen maart · Thursday 26 March 2026

WESTERDUIN, P. (PHILIP) 1978

12668 RSB Competitie 2025-2026 Viertallen december · Thursday 27 November 2025

RIETVELD, L. (LEO) 1940

9488 38ste Open Schaakkampioenschap van Spijkenisse Groep 1 · Saturday 30 November 2024

FREYTAS DE, P.L. (PAUL) 1937

8938 RSB Competitie 2023-2024 Beker ronde 4 · Saturday 20 April 2024

Worst losses

POP, I. (IOAN) 1442

NK-Snelschaken 2024 · Saturday 14 September 2024

KOOPS, B. (BEAU) 1525

7620 Tata Steel Chess Tournament 2024 Tienkampen · Saturday 20 January 2024

STAM, M. (MICK) 1537

NK-Snelschaken 2024 · Saturday 14 September 2024

TJOO, T.P. (LESLIE) 1697

6666 RSB Competitie 2022-2023 8-tallen maart · Monday 13 February 2023

BRANDSMA, J. (JEROEN) 1728

7917 RSB Competitie 2023-2024 8-tallen november · Thursday 9 November 2023

NK-Snelschaken 2024 Saturday 14 September 2024 +9–14=3 -191.0

Tata Steel Chess Tournament 2024 Tienkampen Friday 12 January 2024 +6–1=2 +92.7

39ste Open Schaakkampioenschap van Spijkenisse Groep A Saturday 29 November 2025 +2–2=3 +37.5

Open Kampioenschap Gouda 2025 Groep B Saturday 6 September 2025 +3–3=1 -20.7

RSB Competitie 2025-2026 Achttallen april Monday 1 September 2025 +0–1=0 -8.9

RSB Competitie 2025-2026 Viertallen april Monday 1 September 2025 +2–0=0 +13.8

RSB Competitie 2025-2026 Achttallen maart Monday 1 September 2025 +4–0=0 +53.7

RSB Competitie 2025-2026 Viertallen maart Monday 1 September 2025 +0–0=2 -7.4

RSB Competitie 2025-2026 Viertallen februari Monday 1 September 2025 +1–0=0 +10.3

RSB Competitie 2025-2026 Beker ronde 2 Monday 1 September 2025 +1–0=0 +13.8

RSB Competitie 2025-2026 Achtallen december Monday 1 September 2025 +1–0=0 +10.1

RSB Competitie 2025-2026 Viertallen december Monday 1 September 2025 +1–0=0 +16.9

RSB Competitie 2025-2026 Achtallen november Monday 1 September 2025 +0–0=1 -5.6

RSB Competitie 2025-2026 Viertallen Oktober Monday 1 September 2025 +0–0=1 +4.1

RSB Competitie 2025-2026 Achttallen Oktober Monday 1 September 2025 +0–1=0 -11.1

38ste Open Schaakkampioenschap van Spijkenisse Groep 1 Saturday 30 November 2024 +1–5=1 -52.9

RSB Competitie 2024-2025 4-tallen juni Sunday 1 September 2024 +0–1=0 -21.8

RSB Competitie 2024-2025 8-tallen mei Sunday 1 September 2024 +0–1=0 -17.4

RSB Competitie 2024-2025 4-tallen mei Sunday 1 September 2024 +1–0=0 +4.4

RSB Competitie 2024-2025 4-tallen april Sunday 1 September 2024 +1–0=0 +14.4

RSB Competitie 2024-2025 8-tallen april Sunday 1 September 2024 +1–0=0 +12.8

RSB Competitie 2024-2025 8-tallen maart Sunday 1 September 2024 +0–1=0 -22.3

RSB Competitie 2024-2025 4-tallen maart Sunday 1 September 2024 +1–0=0 +3.6

RSB Competitie 2024-2025 8-tallen februari Sunday 1 September 2024 +1–0=0 +13.0

RSB Competitie 2024-2025 4-tallen Januari Sunday 1 September 2024 +1–0=0 +5.0

RSB Competitie 2024-2025 Beker ronde 2 Sunday 1 September 2024 +0–1=0 -14.4

RSB Competitie 2024-2025 8-tallen december Sunday 1 September 2024 +0–0=1 -2.9

RSB Competitie 2024-2025 4-tallen december Sunday 1 September 2024 +1–0=0

RSB Competitie 2024-2025 Beker ronde 1 Sunday 1 September 2024 +1–0=0 +16.6

RSB Competitie 2024-2025 8-tallen oktober Sunday 1 September 2024 +0–0=2 +2.2

RSB Competitie 2024-2025 4-tallen oktober Sunday 1 September 2024 +1–0=0 +5.8

Spijkenisse Open Vierkampen Schaaktoernooi Groep A Friday 23 February 2024 +3–0=0 +82.7

RSB Competitie 2023-2024 8-tallen juli Friday 1 September 2023 +1–0=0 +17.4

RSB Competitie 2023-2024 8-tallen april Friday 1 September 2023 +1–1=0 +6.1

RSB Competitie 2023-2024 Beker ronde 4 Friday 1 September 2023 +1–0=0 +21.8

RSB Competitie 2023-2024 Beker ronde 3 Friday 1 September 2023 +0–0=1 +4.9

RSB Competitie 2023-2024 8-tallen februari Friday 1 September 2023 +1–0=0 +36.5

RSB Competitie 2023-2024 8-tallen december Friday 1 September 2023 +1–0=0 +32.1

RSB Competitie 2023-2024 8-tallen november Friday 1 September 2023 +0–2=0 -17.7

RSB Competitie 2022-2023 8-tallen juni Thursday 1 September 2022 +1–0=0

RSB Competitie 2022-2023 8-tallen mei Thursday 1 September 2022 +0–0=1 +11.4

RSB Competitie 2022-2023 8-tallen april Thursday 1 September 2022 +1–0=0 +34.0

RSB Competitie 2022-2023 8-tallen maart Thursday 1 September 2022 +0–1=0 -21.0

RSB Competitie 2022-2023 8-tallen januari Thursday 1 September 2022 +0–1=0 -10.8

Rating History

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Peak Ratings

Classic 2022 May 1, 2026

Rapid 1946 Jan. 1, 2026

Blitz 1766 Oct. 1, 2024

Games

Wins 50

Losses 36

Draws 19

Win Rate 48%

Performance by Color

Color	Wins	Draws	Losses	Win Rate
White	22	10	21	42%
Black	28	9	15	54%

Recent Matches

Velde van de, M. (Matthijs) (1930) Thursday 23 April 2026 LOSS -8.9

Alphen van, A.M. (Alex) (1785) Friday 17 April 2026 WIN +6.0

Santifort, J. (Jaap) (1842) Thursday 9 April 2026 WIN +7.8

Hidde van der, C.J.M. (Martin) (1981) Thursday 26 March 2026 WIN +14.3

Rensen, M.A. (Martin) (1903) Thursday 19 March 2026 DRAW -3.7

Pons, P. (Pieter) (1925) Thursday 26 February 2026 WIN +12.5

Wilhelm, P.H. (Paul) (1869) Monday 9 February 2026 WIN +10.3

Haan de, J.B.A. (Jurgen) (1905) Saturday 13 December 2025 WIN +13.8

Parolas, I. (Ioannis) (1816) Thursday 4 December 2025 WIN +10.1

Geerlings, V. (Vincent) (1912) Saturday 29 November 2025 DRAW +0.2

Meulmeester, L. (Luuk) (2042) Saturday 29 November 2025 DRAW +5.6

Vreugdenhil, F. (Frans) (1919) Saturday 29 November 2025 WIN +15.9

IM Hopman, P. (Pieter) (2334) Saturday 29 November 2025 LOSS -2.1

Hollander, J.W. (Hans) (2101) Saturday 29 November 2025 WIN +23.2

Brandsma, R.L. (Romayn) (1935) Saturday 29 November 2025 DRAW +1.2

FM Castellanos Villela, Alejandro (2143) Saturday 29 November 2025 LOSS -6.3

Westerduin, P. (Philip) (1978) Thursday 27 November 2025 WIN +16.9