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

Ljubojevic, Ljubomir

SRB SRB·Born 1950·FIDE #900010·2,698 Games

Classical25712,406 Games

Rapid2471238 Games

Blitz250454 Games

Statistics

2698

Total

858

Wins

1246

Draws

594

Losses

32%46%22%

Play Style

What you need to know before facing them

Elite accuracy: 93.5% average

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.g3 ♚ (75% in 16 games)

Deep Analysis

Stockfish 18 · Classical games · 414 analyzed

Accuracy by phase

Opening96.5%

Middlegame93.7%

Endgame95.5%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

67 Games

Equal position95%

229 Games

Losing (-2 or more)90%

118 Games

Problematic Pieces

Which pieces cause most errors?

♙

21%

134 errors

♖

19%

122 errors

♕

18%

110 errors

♗

15%

93 errors

♔

13%

84 errors

♞

13%

84 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

47% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

18

21

18

16

22

16

16

16

20

22

abcdefgh

Many

Few

Critical squares

d222 err

d522 err

f621 err

d320 err

b518 err

d2/d5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Perez Perez, Gabriel2105

ESP Ch Rapid 2019 · 24 Aug 2019

0-1

L

Suarez Gomez, Julio2433

ESP Ch Rapid 2019 · 24 Aug 2019

0-1

W

Garrido Fernandez, Javier2052

ESP Ch Rapid 2019 · 24 Aug 2019

0-1

W

Mkrtchyan, Levon2148

ESP Ch Rapid 2019 · 24 Aug 2019

0-1

L

Lopez Mulet, Inigo2397

ESP Ch Rapid 2019 · 24 Aug 2019

0-1

W

Marino Bravo, Miguel Angel2165

ESP Ch Rapid 2019 · 24 Aug 2019

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Slav: Semi-Slav

50.0%

8 GamesLow sample·Loses

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Black

Ruy Lopez: Morphy

53.3%

15 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

Strengths

AVOID

White

Sicilian: Kan

61.1%

18 Games·Wins

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

Black

Sicilian: Closed

70.4%

27 Games·Wins

1.e4 c5 2.Nc3 Nc6

Slav: Semi-Slav

50.0%

14 Games·Wins

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#34Bxc7??

Tactics

vs Camacho Collados

Rapid·2019

▶

#99Kxg5??

Endgame

vs Karpov

OTB·2019

▶

#30c5e4??

Endgame

vs Karpov

Blitz·2018

▶

#34d1d2??

Endgame

vs Karpov

Blitz·2018

▶

#31e3g2??

Endgame

vs Karpov

Blitz·2018

▶

#25f4d3??

Endgame

vs Karpov

Blitz·2018

▶

#48b3b2??

Endgame

vs Karpov

Rapid·2018

▶

#30f5g5??

Endgame

vs Karpov

Blitz·2017

▶

#27Rxc8??

Tactics

vs Portisch

Rapid·2012

▶

#38R8e7??

Tactics

vs Nakamura

OTB·2010

Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2019

2018

2017

2016

2015

2013

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

1397 Games

36%46%18%

Move	Games	Performance	%
1.e4	916		61%
1.d4	220		54%
1.c4	152		56%
1.Nf3	65		61%
1.b3	30		50%
1.b4	7		64%
1.f4	4		63%
1.g3	3		33%

1.e4

61%

916

1.d4

54%

220

1.c4

56%

152

1.Nf3

61%

65

1.b3

50%

30

1.b4

64%

7

1.f4

63%

4

1.g3

33%

3

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