Scouting report: Marius Deuer (GM, GER)

916 over-the-board games in the Chess Stalker database (845 classical, 16 rapid, 55 blitz): 36% wins, 26% draws, 37% losses. FIDE rating 2481 standard, 2436 rapid, 2516 blitz. 454 games analyzed with Stockfish: 93% accuracy, 0.07 blunders per game.

  • Opening repertoire of Marius Deuer 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 Marius Deuer's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/16236432 — no account needed.

Marius Deuer

GM

Germanyborn 2008FIDE ID 16236432

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2200
2300
2400
2500
Peak2507
2455 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2516
2481
2436
2507peak, Dec 2024
916games
333wins, 36%
237draws, 26%
337losses, 37%

Play style

before facing them
Elite accuracy: 92.9% average
Very consistent (88%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 as ♔ (57% in 60 games)
Vulnerable to 1.Nf3 ♚ (only 37%)

Play against Deuer's Twin

Their real openings, level & style

Based on 916 games

Openings

916 games

Weaknesses

where they slip as ♔ White
Benko Gambit1.d4 f6 2.c4 c5 3.d5 b5only 9 games, last played 10 months ago66.7%losses
Nimzowitsch-Larsen1.b3 e5 2.b2 c611 games, last played 3 years ago63.6%losses

Strengths

what holds up for them as ♔ White
Nimzo-Indian: Capablanca1.d4 f6 2.c4 e6 3.c3 b4 4.e3 O-O 5.d321 games, last played last month57.1%wins

Deep analysis

Stockfish · Classical · 454 analyzed
Accuracy by phase
Opening
96.8%
Middlegame
93.4%
Endgame
94.9%
Clutch factor
+6%
Winning (+2)
95%
Equal
95%
Losing (−2)
89%
Problematic pieces
26%
103 err
20%
81 err
19%
76 err
13%
53 err
12%
46 err
10%
40 err
Critical moment
Move 39 avg
0%
1-15
20%
16-25
33%
26-35
13%
36-45
33%
46+
33% of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squares
24
Few
Many
e5
24
f6
13
b4
12
c2
12
f3
12
e5/f6 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#30
xd4?? vs Isik
Endgame · OTB · 2026
#69
e5?? vs Kaasen
Endgame · OTB · 2025
#48
b2+?? vs De Boer
Endgame · OTB · 2025
#38
b5?? vs Pakleza
Endgame · OTB · 2025
#55
h4?? vs Bogdanov
Endgame · OTB · 2025
#37
d6?? vs Alvarez Serrano
Endgame · OTB · 2025

Recent games

Kuandykuly, Danis(2394)

24th Spilimbergo Open · 15 Aug 2026

½–½
Nguyen, Piotr(2374)

24th Spilimbergo Open · 14 Aug 2026

1–0
Nemitz, Alfred(2371)

24th Spilimbergo Open · 11 Aug 2026

0–1
Quirhuayo Chumbe, German Gonzalo(2397)

24th Spilimbergo Open · 10 Aug 2026

½–½
Moksh Amit Doshi(2372)

24th Spilimbergo Open · 10 Aug 2026

½–½
Casalaspro, Mathias Andre(2303)

24th Spilimbergo Open · 9 Aug 2026

1–0

Endgame statistics

Repertoire

PRO
916 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
453 games41%W25%D34%L
Move
1. d4
2934w
37%34%29%
54%
1. e4
6211m
52%38%
55%
1. b3
391y
51%46%
53%
1. f3
288m
46%25%29%
59%
1. c4
221y
43%1443%
48%
1. g3
53y
40%60%
40%
1. b4
15y
100%
0%
1. d3
14y
100%
100%
1. c3
14y
100%
0%
1. f4
15y
100%
100%

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