Chess Stalker — Free Chess Opponent Analysis

Analyze any Lichess, Chess.com or FIDE player's openings, weaknesses, blunder patterns and psychological profile. Train against a Twin Bot that replicates your opponent's style. Search by username or FIDE ID across 11 million+ games. Free to use, no signup required.

What you get

Opponent weakness analysis — opening repertoire, common blunders, time pressure patterns
Twin Bot — practice against an AI clone of your opponent's exact playing style
FIDE OTB database — 11 million+ tournament games and 1.7 million+ rated players
Stockfish-powered analysis with depth-25 evaluations
Multi-platform: Lichess, Chess.com, and FIDE in one place
Head-to-head comparison, Nemesis detection, Stalker Score

How it works

Search any Lichess, Chess.com username or FIDE player
Get instant scouting report with weaknesses and patterns
Prepare your strategy and practice against the Twin Bot

GM

Bluebaum, Matthias

GER GER·Born 1997·FIDE #24651516·7,219 Games

Classical26946,616 Games

Rapid2587238 Games

Blitz2634391 Games

Statistics

7219

Total

3955

Wins

1834

Draws

1426

Losses

55%25%20%

Play Style

What you need to know before facing them

Elite accuracy: 93.9% average

High resilience (58%): Dangerous even when losing

Very consistent (88%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♔ (74% in 44 games)

Deep Analysis

Stockfish 18 · Classical games · 887 analyzed

Accuracy by phase

Opening96.9%

Middlegame93.9%

Endgame95.5%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)95%

179 Games

Equal position96%

252 Games

Losing (-2 or more)89%

69 Games

Problematic Pieces

Which pieces cause most errors?

♕

20%

63 errors

♖

19%

60 errors

♙

17%

55 errors

♗

15%

49 errors

♞

15%

47 errors

♔

14%

45 errors

Critical Moment

When does the first serious error occur?

Move 44average

1-15

16-25

26-35

36-45

46+

38% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

9

9

12

11

10

9

10

10

10

12

abcdefgh

Many

Few

Critical squares

d212 err

e512 err

f511 err

c410 err

e410 err

d2/e5 concentrate most errors. Force decisions in those zones.

Recent Games

D

Martinez Alcantara, Jose Eduardo2650

2nd 3-0 Thu 28th May 2026 · 28 May 2026

½-½

W

Galaktionov, Artem2346

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Darvishi, Mohammad Hossein2294

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Ibarra Jerez, Jose Carlos2533

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

L

Gharibyan, Mamikon2477

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Lazavik, Denis2621

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

1.g3 d5 2.Bg2 Nf6

61.5%

13 Games·Loses

1.g3 d5 2.Bg2 Nf6

Strengths

AVOID

White

Nimzo-Indian: Rubinstein

61.6%

664 Games·Wins

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

Queen's Gambit Declined

64.1%

410 Games·Wins

1.d4 d5 2.c4 e6

Black

French: Classical

54.5%

431 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Queen's Gambit Declined

51.3%

450 Games·Wins

1.d4 d5 2.c4 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#30f4??

Tactics

vs Nguyen

OTB·2026

▶

#24Qc5??

Tactics

vs Sindarov

OTB·2026

▶

#86Bf3??

Endgame

vs Theodorou

OTB·2026

▶

#71Bf5??

Endgame

vs Moosavifar

OTB·2026

▶

#27Nxg2??

Tactics

vs Baturin-Vinogradov

OTB·2026

▶

#34h7+??

Tactics

vs Ashraf

OTB·2026

▶

#50Kg7??

Endgame

vs Aravindh

OTB·2026

▶

#58Rg1+??

Endgame

vs Ashraf

OTB·2026

▶

#23Rfe8??

Tactics

vs Martinez Alcantara

OTB·2026

▶

#24h3??

Tactics

vs Mekhitarian

OTB·2026

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

3638 Games

59%24%17%

Move	Games	Performance	%
1.d4 Strong	3443		71%
1.Nf3	100		67%
1.b3 Strong	44		74%
1.c4	43		70%
1.e4	4		50%
1.a4	2		50%
1.e3 Weak	1		0%
1.a3 Strong	1		100%

1.d4

71%

3443

1.Nf3

67%

100

1.b3

74%

44

1.c4

70%

43

1.e4

50%

4

1.a4

50%

2

1.e3

0%

1

1.a3

100%

1

🍪 Cookies · Chess Stalker uses technical cookies (required for operation) and analytical cookies (to improve the service). Analytical cookies are optional.