KNSB FIDE
PW

Philip Westerduin

Rated since January 2023

1957 Classic
2015 Rapid
1952 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
OCKELOEN, I. (IROY) 1976
12667 RSB Competitie 2025-2026 Achtallen december · Friday 28 November 2025
MACHIEL VAN SOEST 1975
12070 Rapidtoernooi SV Voorburg Groep A · Saturday 15 November 2025
KAMAR, M.B. (MUHANNAD) 1922
12070 Rapidtoernooi SV Voorburg Groep A · Saturday 15 November 2025
WAGNER, A.M. (ANDRÉ) 1868
12070 Rapidtoernooi SV Voorburg Groep A · Saturday 15 November 2025
MARTIN DE, L. (LILIAN) 1833
13050 57e Pomartoernooi Groep A · Sunday 22 February 2026
Worst losses
HOOS, B.S. (BOB) 1857
13050 57e Pomartoernooi Groep A · Sunday 22 February 2026
SMITS, E.D. (EDUARD) 1939
13445 RSB Competitie 2025-2026 Viertallen maart · Friday 20 March 2026
AMMERLAAN, T. (THOMAS) 1949
12668 RSB Competitie 2025-2026 Viertallen december · Thursday 27 November 2025
SLUITER, J. (JAN) 1953
13178 RSB Competitie 2025-2026 Viertallen februari · Friday 13 February 2026
HUMMEL, P. (PAUL) 2191
12070 Rapidtoernooi SV Voorburg Groep A · Saturday 15 November 2025
No FIDE-rated tournaments found.
57e Pomartoernooi Groep A Sunday 22 February 2026 +4–1=2 +3.4
Rapidtoernooi SV Voorburg Groep A Saturday 15 November 2025 +4–2=0 +23.7
KNSB competitie 2025-2026 Klasse 4 ronde 9 Saturday 20 September 2025 +0–0=1 +3.7
KNSB competitie 2025-2026 Klasse 4 Ronde 4 Saturday 20 September 2025 +0–0=1 -3.5
RSB Competitie 2025-2026 Achttallen april Monday 1 September 2025 +0–0=2 +1.6
RSB Competitie 2025-2026 Achttallen maart Monday 1 September 2025 +0–0=2 +5.7
RSB Competitie 2025-2026 Viertallen maart Monday 1 September 2025 +0–1=0 -13.2
RSB Competitie 2025-2026 Viertallen februari Monday 1 September 2025 +0–1=0 -13.2
RSB Competitie 2025-2026 Achtallen december Monday 1 September 2025 +1–0=0 +12.4
RSB Competitie 2025-2026 Viertallen december Monday 1 September 2025 +0–1=0 -13.5
RSB Competitie 2025-2026 Achtallen november Monday 1 September 2025 +0–0=1 -1.3

Rating History

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Peak Ratings

Classic 1978 Nov. 1, 2025
Rapid 2015 April 1, 2026
Blitz 1959 March 1, 2026

Games

Wins 9
Losses 6
Draws 9
Win Rate 38%

Performance by Color

Color Wins Draws Losses Win Rate
White 4 6 4 29%
Black 5 3 2 50%

Recent Matches

Vrolijk, O.W. (Olivier) (2027) Monday 20 April 2026 DRAW +2.6
Paulis, W.D. (Winifred) (1923) Friday 17 April 2026 DRAW -1.0
Eeden van, E. (Ed) (2059) Saturday 11 April 2026 DRAW +3.7
Segers, A.J. (Albert) (2033) Monday 23 March 2026 DRAW +2.6
Smits, E.D. (Eduard) (1939) Friday 20 March 2026 LOSS -13.2
Pluymert, P.W. (Piet) (2051) Tuesday 10 March 2026 DRAW +3.2
Nicolaas, J.J.M. (Han) (1776) Sunday 22 February 2026 WIN +5.1
Bons, M.M. (Maurits) (1809) Sunday 22 February 2026 WIN +6.0
Ydo, W.J. (Pim) (2001) Sunday 22 February 2026 DRAW -0.4
Hoos, B.S. (Bob) (1857) Sunday 22 February 2026 LOSS -17.7
Martin de, L. (Lilian) (1833) Sunday 22 February 2026 WIN +6.6
Geerlings, V. (Vincent) (1935) Sunday 22 February 2026 DRAW -2.7
Ramcharan, A. (Aileshwar) (1824) Sunday 22 February 2026 WIN +6.4
Sluiter, J. (Jan) (1953) Friday 13 February 2026 LOSS -13.2
Ockeloen, I. (Iroy) (1976) Friday 28 November 2025 WIN +12.4
Ammerlaan, T. (Thomas) (1949) Thursday 27 November 2025 LOSS -13.5
Bredewoud, T.P. (Thomas) (1875) Saturday 22 November 2025 DRAW -3.5
Zhang, W. (Tony) (2202) Saturday 15 November 2025 LOSS -5.7
Hummel, P. (Paul) (2191) Saturday 15 November 2025 LOSS -6.0
Machiel van Soest (1975) Saturday 15 November 2025 WIN +12.1