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

IM

Kuzmicz, Krystian

POL POL·Born 1987·FIDE #1119125·970 Games

Classical2462778 Games

Rapid235695 Games

Blitz235097 Games

Statistics

970

Total

431

Wins

289

Draws

249

Losses

44%30%26%

Play Style

What you need to know before facing them

Elite accuracy: 92.7% average

Very consistent (92%)

Very precise: only 0.0 blunders/game

Dominates 1.g3 ♔ (65% in 82 games)

Deep Analysis

Stockfish 18 · Classical games · 19 analyzed

Accuracy by phase

Opening94.5%

Middlegame93.0%

Endgame91.3%

Clutch Factor

Performance under pressure

+3%

Winning (+2 or more)93%

6 Games

Equal position94%

9 Games

Losing (-2 or more)89%

4 Games

Problematic Pieces

Which pieces cause most errors?

♞

47%

8 errors

♖

18%

3 errors

♗

12%

2 errors

♔

12%

2 errors

♙

6%

1 errors

♕

6%

1 errors

Critical Moment

When does the first serious error occur?

Move 30average

1-15

16-25

26-35

36-45

46+

Error Heatmap

Where do most errors occur?

1

1

1

1

1

1

1

1

2

1

abcdefgh

Many

Few

Critical squares

d22 err

a61 err

b71 err

c31 err

c51 err

d2/a6 concentrate most errors. Force decisions in those zones.

Recent Games

W

Kokoszczynski, Jan2196

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

1-0

D

Janeczko, Jakub2043

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

½-½

W

Balon, Adam1780

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

1-0

D

Cieslak, Patryk2220

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

½-½

D

Budzisz, Adrian2129

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

½-½

L

Raczek, Krzysztof2409

XII KATOWICKI FESTIWAL SZ... · 31 May 2025

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

Sicilian: Rossolimo

60.0%

10 Games·Loses

1.e4 c5 2.Nf3 Nc6 3.Bb5

Strengths

AVOID

White

French Defense

81.8%

11 Games·Wins

1.e4 e6 2.b3 d5

1.g3 d5 2.Bg2 Nf6

60.0%

10 Games·Wins

1.g3 d5 2.Bg2 Nf6

Black

Sicilian: e6 Systems

60.9%

69 Games·Wins

1.e4 c5 2.Nf3 e6

Caro-Kann

57.1%

14 Games·Wins

1.e4 c6 2.d4 d5

Critical Blunders

Tactical errors analyzed with Stockfish

3 errors

▶

#30Nc5??

Tactics

vs Budzisz

OTB·2025

▶

#36Rg2??

Endgame

vs Klekowski

Blitz·2024

▶

#26b3??

Tactics

vs Skurniak

Blitz·2024

Endgame Statistics

13 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2025

2024

2023

2022

2021

2020

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

487 Games

46%30%24%

Move	Games	Performance	%
1.e4	332		62%
1.g3	82		65%
1.c4	25		52%
1.Nf3	22		59%
1.d4	21		60%
1.b3 Weak	3		17%
1.f4 Strong	1		100%
1.Nc3	1		50%

1.e4

62%

332

1.g3

65%

82

1.c4

52%

25

1.Nf3

59%

22

1.d4

60%

21

1.b3

17%

3

1.f4

100%

1

1.Nc3

50%

1

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