KNSB FIDE
SH

Sergio Harnandan

Rated since January 2023

1988 Classic
1987 Rapid
1987 Blitz

RIVALRY

Nemesis
Hageman, G.M.J. (Ger)
Games: 3 · Win rate: 67%

The good & the bad

Best wins
ELFERINK, L.A. (LEON) 2071
12593 KNSB competitie 2025-2026 Klasse 4 ronde 5 · Saturday 13 December 2025
LAGEMAAT VAN DE, A.G. (AREND) (CM) 2052
9799 KNSB competitie 2024-2025 Klasse 4 ronde 3 · Saturday 9 November 2024
YATSISHIN, IVAN 2019
2023 IBCA World Individual Chess Championship for the Blind and Visually Impaired · Sunday 15 October 2023
NIKOLADZE, G. (GELA) 2013
12775 SOS competitie 2025/2026 Lijst 1 mrt · Tuesday 10 February 2026
REEDIJK, P.J. (PETER) 2006
12409 KNSB competitie 2025-2026 Klasse 4 Ronde 4 · Saturday 22 November 2025
Worst losses
JONG DE, L. (LUCAS) 1610
6047 Ledenweekend NSVG Groep A · Saturday 26 November 2022
STERK, R. (RALF) 1657
7605 SOS Competitie 2023/2024 November 2023 · Tuesday 7 November 2023
MELNIK, STEFAN 1743
IBCA European Chess Championship 2024 for visually impaired players · Thursday 20 June 2024
KARELSE, J.M. (HANS) 1752
5712 SOS Competitie 2022/2023 Januari 2023 · Tuesday 17 January 2023
THUIJLS, J.M.P. (HANS) 1758
46ste Open Internationaal Toernooi Gent · Monday 21 July 2025
ONK NSVG 2025 ONK NSVG 2025 Thursday 27 November 2025 +4–1=1 -4.4
2e ONK NSVG 2024 2e ONK NSVG 2024 Thursday 28 November 2024 +4–2=0 -4.2
IBCA European Chess Championship 2024 for visually impaired players Sunday 16 June 2024 +3–4=2 -38.1
SGS Bekercompetitie 2025-2026 2026-02 Wednesday 1 October 2025 +0–1=0 -6.9
KNSB competitie 2025-2026 Klasse 4 ronde 9 Saturday 20 September 2025 +0–0=1 -0.9
KNSB competitie 2025-2026 Klasse 4 ronde 6 Saturday 20 September 2025 +0–1=0 -13.3
KNSB competitie 2025-2026 Klasse 4 ronde 8 Saturday 20 September 2025 +1–0=0 +11.3
KNSB competitie 2025-2026 Klasse 4 ronde 7 Saturday 20 September 2025 +1–0=0 +10.6
KNSB competitie 2025-2026 Klasse 4 ronde 5 Saturday 20 September 2025 +1–0=0 +16.4
KNSB competitie 2025-2026 Klasse 4 Ronde 4 Saturday 20 September 2025 +1–0=0 +15.8
KNSB competitie 2025-2026 Klasse 4 ronde 3 Saturday 20 September 2025 +1–0=0 +15.0
KNSB competitie 2025-2026 Klasse 4 ronde 1 Saturday 20 September 2025 +0–1=0 -7.3
SOS competitie 2025/2026 Lijst 1 juni Monday 1 September 2025 +0–0=1 +1.8
SOS competitie 2025/2026 Lijst 1 apr Monday 1 September 2025 +0–1=0 -5.4
SOS competitie 2025/2026 Lijst 1 mrt Monday 1 September 2025 +1–0=0 +14.0
SOS competitie 2025/2026 Lijst 1 feb Monday 1 September 2025 +0–1=0 -4.2
SOS competitie 2025/2026 Lijst 1 jan Monday 1 September 2025 +1–0=0 +13.2
SOS competitie 2025/2026 Lijst 1 Dec Monday 1 September 2025 +1–0=0 +14.9
SOS competitie 2025/2026 Lijst 1 Nov Monday 1 September 2025 +1–0=0 +12.1
46ste Open Internationaal Toernooi Gent Saturday 19 July 2025 +4–5=0 -36.8
SGS Bekercompetitie 2024-2025 2025-02 Friday 1 November 2024 +0–1=0 -13.2
SGS Bekercompetitie 2024-12 Friday 1 November 2024 +0–1=0 -12.9
KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … Saturday 21 September 2024 +0–1=0 -13.1
KNSB competitie 2024-2025 Klasse 4 ronde 7 Saturday 21 September 2024 +1–0=0 +13.6
KNSB competitie 2024-2025 Klasse 4 ronde 6 Saturday 21 September 2024 +0–1=0 -12.2
KNSB competitie 2024-2025 Klasse 4 ronde 5 Saturday 21 September 2024 +1–0=0 +12.6
KNSB competitie 2024-2025 Klasse 4 ronde 4 Saturday 21 September 2024 +1–0=0 +15.0
KNSB competitie 2024-2025 Klasse 4 ronde 3 Saturday 21 September 2024 +1–0=0 +17.5
KNSB competitie 2024-2025 Klasse 4 ronde 2 Saturday 21 September 2024 +0–1=0 -7.3
KNSB competitie 2024-2025 Klasse 4 ronde 1 Saturday 21 September 2024 +1–0=0 +14.0
SOS Competitie 2024/2025 2025-05 Sunday 1 September 2024 +1–0=0 +10.5
SOS Competitie 2024/2025 2025-04 Sunday 1 September 2024 +1–0=0 +10.1
SOS Competitie 2024/2025 2025-03 Sunday 1 September 2024 +0–1=0 -11.9
SOS Competitie 2024/2025 2025-02 Sunday 1 September 2024 +1–0=0 +9.1
SOS Competitie 2024/2025 2024-12 Sunday 1 September 2024 +1–0=0 +8.9
SOS Competitie 2024/2025 2024-11 Sunday 1 September 2024 +1–0=0 +10.0
SOS Competitie 2024/2025 2024-10 Sunday 1 September 2024 +2–0=0 +21.2
IBCA World Individual Chess Championship for the Blind and Visually Impaired Sunday 8 October 2023 +3–3=2 +12.3
KNSB competitie 2023-2024 Klasse 4 ronde 9 Saturday 16 September 2023 +0–1=0 -12.0
KNSB competitie 2023-2024 Klasse 4 ronde 8 Saturday 16 September 2023 +0–0=1 +2.6
KNSB competitie 2023-2024 Klasse 4 ronde 7 Saturday 16 September 2023 +1–0=0 +13.4
KNSB competitie 2023-2024 Klasse 4 ronde 6 Saturday 16 September 2023 +0–1=0 -12.7
KNSB competitie 2023-2024 Klasse 4 ronde 5 Saturday 16 September 2023 +1–0=0 +13.2
KNSB competitie 2023-2024 Klasse 4 ronde 4 Saturday 16 September 2023 +1–0=0 +17.6
KNSB competitie 2023-2024 Klasse 4 ronde 3 Saturday 16 September 2023 +1–0=0 +18.6
SOS Competitie 2023/2024 April 2024 Friday 1 September 2023 +0–1=0 -11.1
SOS Competitie 2023/2024 Maart 2024 Friday 1 September 2023 +0–0=1 +3.4
SOS Competitie 2023/2024 Januari 2024 Friday 1 September 2023 +1–0=0 +12.9
SOS Competitie 2023/2024 December 2023 Friday 1 September 2023 +0–1=0 -10.2
SOS Competitie 2023/2024 November 2023 Friday 1 September 2023 +0–1=0 -8.9
SOS Competitie 2023/2024 September 2023 Friday 1 September 2023 +1–0=0 +15.4
ONK NSVG 2023 ONK NSVG 2023 Thursday 16 February 2023 +4–1=1 +19.7
Ledenweekend NSVG Groep A Saturday 26 November 2022 +1–1=1 -22.7
SGS Bekercompetitie dec 2022 Monday 17 October 2022 +0–1=0 -10.9
KNSB competitie 2022-2023 Klasse 4 ronde 9 Saturday 17 September 2022 +0–1=0 -13.4
KNSB competitie 2022-2023 Klasse 4 ronde 6 Saturday 17 September 2022 +0–0=1 +2.0
SOS Competitie 2022/2023 Mei Monday 12 September 2022 +1–0=0 +9.1
SOS Competitie 2022/2023 April 2023(HK) Monday 12 September 2022 +1–0=0 +15.7
SOS Competitie 2022/2023 Maart 2023(HK) Monday 12 September 2022 +0–1=0 -6.8
SOS Competitie 2022/2023 Januari 2023 Monday 12 September 2022 +0–1=0 -13.8

Team Competition

Current teams
Zeist 1
Klasse 4C · 2025-2026 · 8 games
Zeist 1
HKD · 2025-2026 · 7 games
Past teams
Zeist 1
1C · 2024-2025
Zeist 1
Klasse 4C · 2024-2025
Zeist 1
Klasse 4E · 2023-2024
Zeist 1
HKB · 2023-2024
Zeist 1
HKB · 2022-2023
Zeist 1
Klasse 4E · 2022-2023
Zeist 1
Klasse 5C · 2021-2022
Zeist 1
1D · 2021-2022
Sc Zeist 1
HKA · 2019-2020
S.G. Amersfoort 1
HKA · 2019-2020
Sc Zeist 1
HKA · 2018-2019

Rating History

Loading rating history...

Peak Ratings

Classic 1994 March 1, 2026
Rapid 1994 March 1, 2026
Blitz 1994 March 1, 2026

Games

Wins 52
Losses 37
Draws 12
Win Rate 51%

Performance by Color

Color Wins Draws Losses Win Rate
White 36 8 23 54%
Black 16 4 14 47%

Recent Matches

Valstar, J.R. (Johan) (2038) Friday 8 May 2026 DRAW +1.8
Meijer, S.T. (Sjoerd) (1960) Saturday 11 April 2026 DRAW -0.9
Hoolsema, M. (Maarten) (1970) Saturday 28 March 2026 LOSS -13.3
Smeenk, M. (Merijn) (2045) Friday 20 March 2026 LOSS -5.4
Hageman, G.M.J. (Ger) (1958) Saturday 7 March 2026 WIN +11.3
Nikoladze, G. (Gela) (2013) Tuesday 10 February 2026 WIN +14.0
Dambrink, J.L. (Louis) (1913) Saturday 7 February 2026 WIN +10.6
Heijer den, C.A. (Rolinde) (2136) Saturday 31 January 2026 LOSS -6.9
Goes, S.F. (Sten) (2243) Tuesday 13 January 2026 LOSS -4.2
Elferink, L.A. (Leon) (2071) Saturday 13 December 2025 WIN +16.4
Hageman, G.M.J. (Ger) (1974) Tuesday 2 December 2025 WIN +13.2
Booy, W.A. (Willem) (1669) Sunday 30 November 2025 WIN +5.0
Spoelstra, J.L. (Jan) (1619) Saturday 29 November 2025 WIN +3.9
Makkinje, J. (Jeroen) (1558) Saturday 29 November 2025 WIN +2.7
Smit, E. (Emeline) (1962) Friday 28 November 2025 LOSS -10.7
Lange de, M. (Marieke) (1509) Friday 28 November 2025 WIN +2.0
Vaillant, P.E. (Paul) (1675) Thursday 27 November 2025 DRAW -7.3
Reedijk, P.J. (Peter) (2006) Saturday 22 November 2025 WIN +15.8
Veldhorst, B. (Berend) (1978) Tuesday 11 November 2025 WIN +14.9
Vos de, M.A.C. (Michaël) (1982) Saturday 1 November 2025 WIN +15.0