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

Kazakouski, Valery

LTU LTU·Born 2000·FIDE #13507443·2,833 Games

Classical25872,549 Games

Rapid2523133 Games

Blitz2546175 Games

Statistics

2833

Total

1491

Wins

684

Draws

658

Losses

53%24%23%

Play Style

What you need to know before facing them

Elite accuracy: 94.0% average

Solid conversion: 88%

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (71% in 35 games)

Deep Analysis

Stockfish 18 · Classical games · 587 analyzed

Accuracy by phase

Opening96.4%

Middlegame94.1%

Endgame95.1%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

244 Games

Equal position95%

191 Games

Losing (-2 or more)91%

65 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

85 errors

♙

17%

61 errors

♕

16%

57 errors

♗

15%

56 errors

♞

15%

56 errors

♔

14%

51 errors

Critical Moment

When does the first serious error occur?

Move 47average

1-15

16-25

26-35

36-45

46+

56% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

11

10

11

11

11

15

17

13

13

12

abcdefgh

Many

Few

Critical squares

e417 err

d415 err

d313 err

e213 err

f212 err

e4/d4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Popov, Tikhon2283

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Keleberda, Tymur2357

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Shevchenko,Yaroslav2275

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Pelev, Iassen1933

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Ferey, Antonin2284

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Diaz Perez, Michel Alejandro2425

Titled Tue 26th May 2026 · 26 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Reti: Gambit

68.0%

75 Games·Wins

1.Nf3 d5 2.c4 e6

Ruy Lopez: Closed

70.0%

10 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7

Black

Nimzo-Indian: Rubinstein

52.8%

36 Games·Wins

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

Sicilian: d6 Systems

50.0%

50 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#28Rxg6??

Tactics

vs Prraneeth Vuppala

OTB·2025

▶

#28Nxf4??

Tactics

vs Lymar

OTB·2025

▶

#33Nxb7+??

Tactics

vs Gozzoli

OTB·2025

▶

#57Rxb2??

Endgame

vs Jakubowski

Rapid·2025

▶

#58Qd3??

Endgame

vs Andrijashkin

OTB·2025

▶

#43Be4??

Endgame

vs Ribeiro

OTB·2025

▶

#32g6??

Tactics

vs Sengupta

OTB·2025

▶

#33Kg2??

Tactics

vs Kosakowski

OTB·2025

▶

#23Qb5??

Tactics

vs Klimkowski

OTB·2025

▶

#82Kf4??

Endgame

vs Nie

OTB·2025

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

1423 Games

56%24%20%

Move	Games	Performance	%
1.d4	633		67%
1.Nf3 Strong	459		71%
1.e4	289		68%
1.c4 Strong	35		71%
1.b3 Strong	4		75%
1.g3 Strong	2		100%
1.f4 Strong	1		100%

1.d4

67%

633

1.Nf3

71%

459

1.e4

68%

289

1.c4

71%

35

1.b3

75%

4

1.g3

100%

2

1.f4

100%

1

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