Aad Jan Roos

Rated since January 2023

RIVALRY

Nemesis

Landsheer, J. (Jeroen)

Games: 3 · Win rate: 33%

Kryptonite

Tromer, S.I. (Stephan)

Games: 3 · Win rate: 0%

The good & the bad

Best wins

LANDSHEER, J. (JEROEN) 1829

8542 S.V. Erasmus interne competitie 22-01-2024 t/m 19-02-2024 (140014) · Monday 5 February 2024

JONG DE, J.H.A. (JESSE) 1779

9088 Erasmus Watertorentoernooi Groep A Ronde 3 t/m 5 · Monday 29 April 2024

RUIMSCHOOT, P. (PETER) 1552

10904 S.V. Erasmus interne competitie 20-01-2025 t/m 24-03-2025 (140014) · Monday 24 March 2025

KOPPENENS, J.F.B. (BEN) 1408

6907 S.V. Erasmus interne competitie 27-02-2023 t/m 27-03-2023 (140014) · Monday 13 March 2023

HESSELMANS, L.J.M. (RENS) 1302

6620 S.V. Erasmus interne competitie 16-01-2023 t/m 20-02-2023 (140014) · Monday 23 January 2023

Worst losses

AS VAN, C.J. (COR) 1552

6907 S.V. Erasmus interne competitie 27-02-2023 t/m 27-03-2023 (140014) · Monday 27 February 2023

BEERENDS, U. (UNGER) 1575

10730 Erasmus Watertorentoernooi Groep A · Monday 14 April 2025

MEERKERK VAN, J. (JAAP) 1676

8542 S.V. Erasmus interne competitie 22-01-2024 t/m 19-02-2024 (140014) · Monday 19 February 2024

BOER, G.M. (GERRIT) 1711

13673 S.V. Erasmus interne competitie 30-03-2026 t/m 20-04-2026 (140014) · Monday 13 April 2026

LANDSHEER, J. (JEROEN) 1713

6620 S.V. Erasmus interne competitie 16-01-2023 t/m 20-02-2023 (140014) · Monday 16 January 2023

No FIDE-rated tournaments found.

S.V. Erasmus interne competitie 30-03-2026 t/m 20-04-2026 (140014) Monday 16 February 2026 +0–1=0 -11.6

S.V. Erasmus interne competitie 16-02-2026 t/m 23-03-2026 (140014) Monday 16 February 2026 +0–10=0 -85.3

Erasmus Watertorentoernooi Groep A Ronde 7 Monday 7 April 2025 +0–0=1 -2.1

Erasmus Watertorentoernooi Groep A Ronde 3 t/m 6 Monday 7 April 2025 +0–1=2 -16.2

Erasmus Watertorentoernooi Groep A Monday 7 April 2025 +0–1=1 -30.1

S.V. Erasmus interne competitie 31-03-2025 t/m 31-03-2025 (140014) Monday 20 January 2025 +0–1=0 -15.3

S.V. Erasmus interne competitie 20-01-2025 t/m 24-03-2025 (140014) Monday 20 January 2025 +1–1=4 -34.0

Erasmus Watertorentoernooi Groep A Ronde 6 t/m 7 Monday 15 April 2024 +0–0=2 +5.5

Erasmus Watertorentoernooi Groep A Ronde 3 t/m 5 Monday 15 April 2024 +1–0=1 +15.9

Erasmus Watertorentoernooi Groep A Ronde 1 t/m 2 Monday 15 April 2024 +1–1=0 -7.0

S.V. Erasmus interne competitie 22-01-2024 t/m 19-02-2024 (140014) Monday 22 January 2024 +2–1=1 -2.9

Watertorentoernooi Ronde 4 t/m 7 Monday 3 April 2023 +0–1=0 -10.3

Watertorentoernooi Watertoren Monday 3 April 2023 +0–1=1 -8.4

S.V. Erasmus interne competitie 27-02-2023 t/m 27-03-2023 (140014) Monday 16 January 2023 +1–1=0 -15.5

S.V. Erasmus interne competitie 16-01-2023 t/m 20-02-2023 (140014) Monday 16 January 2023 +1–1=3 -30.0

Rating History

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Peak Ratings

Classic 1824 July 1, 2024

Rapid 1727 March 1, 2026

Blitz 1727 March 1, 2026

Games

Wins 7

Losses 21

Draws 16

Win Rate 16%

Performance by Color

Color	Wins	Draws	Losses	Win Rate
White	3	10	12	12%
Black	4	6	9	21%

Recent Matches

Boer, G.M. (Gerrit) (1711) Monday 13 April 2026 LOSS -11.6

Houten van, A.C.J. (Arno) (1918) Monday 23 March 2026 LOSS -6.3

Smit, J. (Jan) (1794) Monday 16 March 2026 LOSS -10.2

Tromer, S.I. (Stephan) (1750) Monday 2 March 2026 LOSS -11.7

Korte de, J.A. (Jan) (1861) Monday 23 February 2026 LOSS -8.0

Geerlings, V. (Vincent) (1912) Monday 16 February 2026 LOSS -6.5

Engelen, N.D.S. (Niels) (1668) Monday 2 June 2025 DRAW -2.1

Knegt de, A.P. (Bram) (1693) Monday 26 May 2025 DRAW -1.8

Wild de, F.C. (Fred) (1579) Monday 19 May 2025 DRAW -5.5

Torczynski, P. (Peter) (1895) Monday 28 April 2025 LOSS -8.9

Beerends, U. (Unger) (1575) Monday 14 April 2025 LOSS -19.4

Braber van den, N.M. (Niels) (1372) Monday 7 April 2025 DRAW -10.7

Stroosma, H. (Harry) (1744) Monday 31 March 2025 LOSS -15.3

Ruimschoot, P. (Peter) (1552) Monday 24 March 2025 WIN +4.3

Meyboom, J.C.J. (Jan-Kees) (1622) Monday 3 March 2025 DRAW -6.5