SK

Siebe Kossen

Rated since July 2023

1496 Classic
1632 Rapid

RIVALRY

Nemesis
Székely, S. (Stijn)
Games: 3 · Win rate: 67%
Easy Target
Sountheranayagam, D. (Deniz)
Games: 4 · Win rate: 75%

The good & the bad

Best wins
SOUNTHERANAYAGAM, D. (DERIN) 1862
10709 GP HWP Haarlem Groep A · Sunday 15 June 2025
BENTUM VAN, A.J. (GUUS) 1684
11819 8e Finbotx GP Hoorn Groep A · Sunday 19 October 2025
HOOGMOED, S. (SEBASTIAN) 1641
9599 GP "Jos Admiraal" Limmen Groep A · Sunday 23 March 2025
TARIGONDA, S.T. (SEYAN) 1629
11798 GP Zaanstad Groep A · Sunday 16 November 2025
KROON, L. (LARS) 1605
9599 GP "Jos Admiraal" Limmen Groep A · Sunday 23 March 2025
Worst losses
YAN XU, E. (EDEN) 636
6601 NK voor schoolteams BO algemeen, 1e speeldag Alle teams ronde 1-6 · Saturday 3 June 2023
MA, T. (TIM) 1063
6601 NK voor schoolteams BO algemeen, 1e speeldag Alle teams ronde 1-6 · Saturday 3 June 2023
GANG, K.W.Z. (KEVIN WAN ZE) 1166
6601 NK voor schoolteams BO algemeen, 1e speeldag Alle teams ronde 1-6 · Saturday 3 June 2023
VEEN VAN, J. (JESPER) 1297
10469 Grand Prix Overdie Alkmaar Groep A · Sunday 13 April 2025
BRUGGE VAN DE, B. (BOAZ) 1424
10469 Grand Prix Overdie Alkmaar Groep A · Sunday 13 April 2025
No FIDE-rated tournaments found.
GP Zaanstad Groep A Sunday 16 November 2025 +2–3=2 -40.5
8e Finbotx GP Hoorn Groep A Sunday 19 October 2025 +1–5=0 -79.9
GP HWP Haarlem Groep A Sunday 15 June 2025 +5–2=0 -5.6
Grand Prix Overdie Alkmaar Groep A Sunday 13 April 2025 +5–2=0 -61.7
GP "Jos Admiraal" Limmen Groep A Sunday 23 March 2025 +4–2=1 +34.9
NK voor schoolteams BO algemeen, 2e speeldag Alle teams ronde 7-11 Saturday 10 June 2023 +3–1=1 +62.6
NK voor schoolteams BO algemeen, 1e speeldag Alle teams ronde 1-6 Saturday 3 June 2023 +3–3=0 -350.2
GP Heiloo Groep A Sunday 19 March 2023 +6–0=1 +58.8

Rating History

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Peak Ratings

Classic 1496 April 1, 2024
Rapid 1708 Oct. 1, 2025

Games

Wins 29
Losses 18
Draws 5
Win Rate 56%

Performance by Color

Color Wins Draws Losses Win Rate
White 17 2 9 61%
Black 12 3 9 50%

Recent Matches

Sountheranayagam, D. (Deniz) (1521) Sunday 16 November 2025 DRAW -6.4
Telegin, N. (Nikita) (1569) Sunday 16 November 2025 WIN +16.2
Székely, S. (Stijn) (1601) Sunday 16 November 2025 LOSS -22.1
Azier, S. (Suzanne) (1618) Sunday 16 November 2025 LOSS -21.1
Tarigonda, S.T. (Seyan) (1629) Sunday 16 November 2025 WIN +19.5
Veldt, G. (Gijs) (1637) Sunday 16 November 2025 LOSS -20.1
Badrinath, T. (Tijuvardan) (1516) Sunday 16 November 2025 DRAW -6.6
Klaver, R. (Rens) (1658) Sunday 19 October 2025 LOSS -22.8
Suring, J. (Jesse) (1735) Sunday 19 October 2025 LOSS -18.5
Sountheranayagam, D. (Derin) (1737) Sunday 19 October 2025 LOSS -18.4
Ozdemir, O. (Orhan Galip) (1750) Sunday 19 October 2025 LOSS -17.7
Bentum van, A.J. (Guus) (1684) Sunday 19 October 2025 WIN +18.7
Kaushik, S. (Shashank) (1686) Sunday 19 October 2025 LOSS -21.2
Székely, S. (Stijn) (1443) Sunday 15 June 2025 WIN +8.9
Alderden, Y.A.I. (Younan) (1457) Sunday 15 June 2025 LOSS -32.9
Sountheranayagam, D. (Derin) (1862) Sunday 15 June 2025 WIN +31.6
Chim, B. (Benjamin) (1408) Sunday 15 June 2025 WIN +7.5
Tarigonda, S.T. (Seyan) (1307) Sunday 15 June 2025 WIN +4.2
Sountheranayagam, D. (Deniz) (1442) Sunday 15 June 2025 WIN +8.8
Chim, J. (Jonathan) (1439) Sunday 15 June 2025 LOSS -33.7