KNSB FIDE
SH

Sergio Harnandan

Rated since January 2023

1986 Classic
1987 Rapid
1987 Blitz

RIVALRY

Nemesis
Hageman, G.M.J. (Ger)
Games: 4 · Win rate: 75%

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 +0–2=0 -26.7
KNSB competitie 2025-2026 Klasse 4 ronde 8 Saturday 20 September 2025 +2–0=0 +22.5
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 apr Monday 1 September 2025 +0–2=0 -10.7
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

Rating History

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Peak Ratings

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

Games

Wins 53
Losses 39
Draws 11
Win Rate 51%

Performance by Color

Color Wins Draws Losses Win Rate
White 37 7 25 54%
Black 16 4 14 47%

Recent Matches

Meijer, S.T. (Sjoerd) (1960) Saturday 11 April 2026 DRAW -0.9
Hoolsema, M. (Maarten) (1970) Saturday 28 March 2026 LOSS -13.3
Hoolsema, M. (Maarten) (1970) Saturday 28 March 2026 LOSS -13.3
Smeenk, M. (Merijn) (2045) Friday 20 March 2026 LOSS -5.4
Smeenk, M. (Merijn) (2045) Friday 20 March 2026 LOSS -5.4
Hageman, G.M.J. (Ger) (1958) Saturday 7 March 2026 WIN +11.3
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