Scouting report: Thomas Beerdsen (GM, NED)

3,082 over-the-board games in the Chess Stalker database (2,951 classical, 49 rapid, 106 blitz): 52% wins, 20% draws, 27% losses. FIDE rating 2504 standard, 2505 rapid, 2552 blitz. 825 games analyzed with Stockfish: 93% accuracy, 0.07 blunders per game.

  • Opening repertoire of Thomas Beerdsen as White and Black, with results per line — free.
  • Weaknesses and blunder patterns, evaluated with Stockfish — free.
  • Recent over-the-board games and endgame statistics.
  • Twin Bot: a sparring bot that imitates Thomas Beerdsen's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/1030108 — no account needed.

Thomas Beerdsen

GM

Netherlandsborn 1998FIDE ID 1030108

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2440
2480
2520
2560
Peak2538
2511 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2552
2505
2504
2538peak, Jun 2025
3,082games
1,616wins, 52%
618draws, 20%
842losses, 27%

Play style

before facing them
Elite accuracy: 93.3% average
High resilience (68%): Dangerous even when losing
Solid conversion: 90%
Very consistent (90%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 as ♔ (66% in 1462 games)
Vulnerable to 1.c4 ♚ (only 46%)

Play against Beerdsen's Twin

Their real openings, level & style

Based on 3,082 games

Openings

3,082 games

Weaknesses

where they slip as ♔ White
French: Steinitz1.e4 e6 2.d4 d5 3.c3 f6 4.e5only 9 games, last played 7 years ago44.4%losses

Strengths

what holds up for them as ♔ White
Sicilian: d6 Systems1.e4 c5 2.f3 d6238 games, last played 6 days ago57.1%wins
Pirc Defense1.e4 d6 2.d4 f641 games, last played 2 weeks ago73.2%wins

Deep analysis

Stockfish · Classical · 825 analyzed
Accuracy by phase
Opening
96.1%
Middlegame
93.1%
Endgame
94.9%
Clutch factor
+4%
Winning (+2)
94%
Equal
94%
Losing (−2)
90%
Problematic pieces
22%
96 err
19%
85 err
17%
74 err
15%
64 err
14%
62 err
13%
59 err
Critical moment
Move 38 avg
6%
1-15
19%
16-25
28%
26-35
22%
36-45
25%
46+
28% of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squares
14
14
17
15
Few
Many
e4
17
f4
15
e5
14
f6
14
c6
13
e4/f4 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#23
f6?? vs Kunin
Middlegame · OTB · 2026
#44
gxh3?? vs Bosiocic
Middlegame · OTB · 2025
#35
h1+?? vs Nigmatov
Endgame · OTB · 2025
#29
b5?? vs Badacsonyi
Middlegame · OTB · 2025
#33
xe5?? vs Badacsonyi
Endgame · OTB · 2025
#32
fe8?? vs Van Foreest
Middlegame · OTB · 2025

Recent games

Glek, Igor(2424)

Muelheimer 5 Tagesnorm GM · 7 Sept 2026

½–½
Parvanyan, Ashot(2424)

Muelheimer 5 Tagesnorm GM · 6 Sept 2026

1–0
Korneev, Oleg(2436)

Muelheimer 5 Tagesnorm GM · 6 Sept 2026

½–½
Lenaerts, Lennert(2357)

Muelheimer 5 Tagesnorm GM · 5 Sept 2026

1–0
Ten Dam, Bram(2349)

Muelheimer 5 Tagesnorm GM · 5 Sept 2026

1–0
Stoyanov, Tsvetan(2440)

Sofia Cup Blitz 2026 · 30 Aug 2026

1–0

Endgame statistics

Repertoire

PRO
3,082 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
1,560 games57%W19%D24%L
Move
1. e4
14621w
57%1924
66%
1. d4
234w
52%29%19
61%
1. g4
234y
61%35%
63%
1. a4
201y
70%25%
73%
1. c4
97m
33%67%
67%
1. f3
71y
67%1716
64%
1. h3
65y
83%17
83%
1. b3
52y
60%2020
70%
1. c3
31y
33%67%
67%
1. a3
13y
100%
100%
1. g3
12y
100%
100%

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