IM

Deuer, Marius

GER GER·Born 2008·FIDE #16236432·1,080 Games

Classical24901,007 Games
Rapid243617 Games
Blitz251656 Games

Statistics

1080

Total

401

Wins

293

Draws

375

Losses

37%27%35%

Play Style

What you need to know before facing them

Elite accuracy: 92.9% average
Low resilience (33%): Doesn't save lost positions
Very consistent (88%)
Very precise: only 0.1 blunders/game
Dominates 1.Nf3 ♔ (64% in 36 games)
Vulnerable to 1.c4 ♚ (only 30%)

Deep Analysis

Stockfish 18 · Classical games · 453 analyzed

Accuracy by phase
Opening96.8%
Middlegame93.4%
Endgame94.9%

Clutch Factor

Performance under pressure

+6%
Winning (+2 or more)95%
161 Games
Equal position95%
169 Games
Losing (-2 or more)89%
123 Games

Problematic Pieces

Which pieces cause most errors?

♖
26%
103 errors
♙
20%
81 errors
♕
19%
76 errors
♞
13%
53 errors
♔
12%
46 errors
♗
10%
40 errors

Critical Moment

When does the first serious error occur?

Move 39average
1-15
16-25
26-35
36-45
46+
33% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

13
9
11
24
12
12
11
10
12
12
abcdefgh
Many
Few
Critical squares
e524 err
f613 err
b412 err
c212 err
f312 err
e5/f6 concentrate most errors. Force decisions in those zones.

Recent Games

D
Rodshtein, Maxim2600

2nd Bundesliga Sud 25-26 · 1 Mar 2026

½-½
W
Slobodjan, Roman2450

2nd Bundesliga Sud 25-26 · 28 Feb 2026

1-0
L
Oktem, Ege Tuna2356

Graz Open A 2026 · 20 Feb 2026

1-0
D
Schneider, Jana2291

Round 8: Deuer, Marius - ... · 19 Feb 2026

½-½
W
Diachek, Andrii2301

Round 7: Diachek, Andrii ... · 18 Feb 2026

0-1
D
Mohylnyi, Stepan2231

Round 5: Mohylnyi, Stepan... · 17 Feb 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!
White
1.b3 e5 2.Bb2 Nc6
63.6%
11 Games·Loses

1.b3 e5 2.Bb2 Nc6

Black
English: Anglo-Indian
72.7%
11 Games·Loses

1.c4 Nf6 2.Nc3 c5

Catalan
55.0%
20 Games·Loses

1.d4 Nf6 2.c4 e6 3.g3

Strengths

AVOID
White
Nimzo-Indian: Capablanca
59.3%
27 Games·Wins

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#30Nxd4??
Tactics
vs Isik
OTB·2026
▶
#69Ke5??
Endgame
vs Kaasen
OTB·2026
▶
#48Qb2+??
Endgame
vs De Boer
OTB·2025
▶
#38Bb5??
Tactics
vs Pakleza
OTB·2025
▶
#55Kh4??
Endgame
vs Bogdanov
OTB·2025
▶
#37Nd6??
Tactics
vs Alvarez Serrano
OTB·2025
▶
#47Ng6??
Endgame
vs Grischuk
Blitz·2025
▶
#16dxe6??
Tactics
vs Meier
Rapid·2025
▶
#36Re1+??
Tactics
vs Froewis
Rapid·2025
▶
#33Nf3??
Tactics
vs Subelj
Blitz·2025
Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2026
2025
2024
2023
2022
2021
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
536 Games
42%27%31%
1.d4
55%
364
1.e4
55%
63
1.b3
53%
39
1.Nf3
64%
36
1.c4
54%
25
1.g3
40%
5
1.b4
0%
1
1.f4
100%
1
1.d3
100%
1
1.Nc3
0%
1
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