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

Zhigalko, Sergei

BLR BLR·Born 1989·FIDE #13502956·7,335 Games

Classical25726,815 Games

Rapid2562212 Games

Blitz2575308 Games

Statistics

7335

Total

4237

Wins

1443

Draws

1654

Losses

58%20%23%

Play Style

What you need to know before facing them

Elite accuracy: 91.8% average

Very consistent (84%)

Very precise: only 0.2 blunders/game

Dominates 1.g4 ♔ (74% in 17 games)

Deep Analysis

Stockfish 18 · Classical games · 209 analyzed

Accuracy by phase

Opening96.8%

Middlegame92.7%

Endgame93.4%

Clutch Factor

Performance under pressure

+7%

Winning (+2 or more)93%

88 Games

Equal position94%

67 Games

Losing (-2 or more)86%

68 Games

Problematic Pieces

Which pieces cause most errors?

♖

27%

81 errors

♞

18%

54 errors

♙

18%

53 errors

♕

16%

47 errors

♔

13%

39 errors

♗

9%

27 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

34% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

8

9

8

9

8

10

9

7

10

16

abcdefgh

Many

Few

Critical squares

f316 err

c410 err

e310 err

d49 err

d59 err

f3/c4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Rogov, Matfey2380

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Martinez Alcantara, Jose Eduardo2650

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Kourkoulos-Arditis, Stamatis2570

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Dubnevych, Maksym2350

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Malik, Maciej2183

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

1-0

W

Pham, Le Thao Nguyen2348

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Sicilian: d6 Systems

68.1%

495 Games·Wins

1.e4 c5 2.Nf3 d6

Caro-Kann: Advance

61.2%

420 Games·Wins

1.e4 c6 2.d4 d5 3.e5

Black

Reti: Reversed London

71.2%

146 Games·Wins

1.Nf3 d5 2.g3 c6

London System

66.7%

45 Games·Wins

1.d4 Nf6 2.Bf4 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#34Qf5??

Tactics

vs Ashraf

OTB·2025

▶

#19Nxd7??

Tactics

vs Terry

OTB·2025

▶

#55Rc2??

Endgame

vs Obrusnik

OTB·2025

▶

#19Rd2??

Tactics

vs Tasdogen

OTB·2025

▶

#44Rxc4??

Endgame

vs Esipenko

OTB·2025

▶

#46Kf3??

Endgame

vs Kishiev

OTB·2025

▶

#46Bd7??

Endgame

vs Meng

OTB·2025

▶

#63Qc4??

Endgame

vs Diaz Perez

OTB·2025

▶

#36Nb7??

Tactics

vs Tsaruk

OTB·2025

▶

#61Nd5??

Endgame

vs Cherepov

OTB·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

3737 Games

62%18%20%

Move	Games	Performance	%
1.e4 Strong	3635		71%
1.d4	55		60%
1.c4	24		69%
1.g4 Strong	17		74%
1.Nf3	3		67%
1.h4 Strong	3		100%

1.e4

71%

3635

1.d4

60%

55

1.c4

69%

24

1.g4

74%

17

1.Nf3

67%

3

1.h4

100%

3

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