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

Janik, Igor

POL POL·Born 2000·FIDE #1159259·2,201 Games

Classical25231,829 Games

Rapid2510193 Games

Blitz2504202 Games

Statistics

2201

Total

1084

Wins

587

Draws

527

Losses

49%27%24%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

High resilience (56%): Dangerous even when losing

Solid conversion: 89%

Very consistent (90%)

Very precise: only 0.0 blunders/game

Dominates 1.Nf3 ♔ (68% in 127 games)

Deep Analysis

Stockfish 18 · Classical games · 656 analyzed

Accuracy by phase

Opening96.0%

Middlegame93.1%

Endgame95.1%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

225 Games

Equal position94%

176 Games

Losing (-2 or more)90%

99 Games

Problematic Pieces

Which pieces cause most errors?

♖

29%

119 errors

♙

19%

78 errors

♞

16%

68 errors

♕

16%

68 errors

♗

11%

47 errors

♔

9%

36 errors

Critical Moment

When does the first serious error occur?

Move 46average

1-15

16-25

26-35

36-45

46+

42% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

11

13

14

14

11

17

15

15

11

13

abcdefgh

Many

Few

Critical squares

e517 err

d415 err

f515 err

e614 err

f614 err

e5/d4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Kononenko,Dmitry22119

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Karpenko, Anton2308

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Sotek, Simon2179

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Weishaeutel, Moritz2393

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Kashlinskaya, Alina2474

Titled Tue 26th May 2026 · 26 May 2026

0-1

D

Asish Panda1942

Titled Tue 26th May 2026 · 26 May 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

English vs 1...e5

62.5%

8 GamesLow sample·Loses

1.c4 e5 2.Nc3 Bb4

Black

English: Four Knights

55.6%

9 GamesLow sample·Loses

1.c4 e5 2.Nc3 Nf6

Strengths

AVOID

White

Sicilian: d6 Systems

65.9%

91 Games·Wins

1.e4 c5 2.Nf3 d6

King's Indian

65.1%

43 Games·Wins

1.d4 Nf6 2.c4 g6

Black

Caro-Kann: Panov-Botvinnik

80.0%

15 Games·Wins

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

Sicilian: Rossolimo

56.3%

16 Games·Wins

1.e4 c5 2.Nf3 Nc6 3.Bb5

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#43Qd5??

Endgame

vs Kacprzak

Rapid·2025

▶

#34Qa8+??

Tactics

vs Cukrowski

Rapid·2025

▶

#36Be4??

Tactics

vs Nasuta

Rapid·2025

▶

#37gxf6??

Tactics

vs Piorun

Rapid·2025

▶

#28Bc5??

Tactics

vs Baum

Rapid·2025

▶

#34Rd5??

Tactics

vs Jasiulewicz

OTB·2025

▶

#28Nec8??

Tactics

vs Suder

OTB·2024

▶

#46a4??

Endgame

vs Denk

Blitz·2024

▶

#17Rhf1??

Tactics

vs Radeva

Blitz·2024

▶

#50Rh1??

Endgame

vs Nikolovski

Blitz·2024

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

1125 Games

52%28%20%

Move	Games	Performance	%
1.e4	623		65%
1.d4	245		66%
1.Nf3	127		68%
1.c4	110		65%
1.g3	7		64%
1.b3	5		70%
1.a3 Strong	3		100%
1.b4 Strong	1		100%
1.d3 Weak	1		0%
1.Nc3 Strong	1		100%
1.c3 Strong	1		100%
1.h4 Weak	1		0%

1.e4

65%

623

1.d4

66%

245

1.Nf3

68%

127

1.c4

65%

110

1.g3

64%

7

1.b3

70%

5

1.a3

100%

3

1.b4

100%

1

1.d3

0%

1

1.Nc3

100%

1

1.c3

100%

1

1.h4

0%

1

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