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

Baidetskyi, Valentin

AUT AUT·Born 2002·FIDE #14142317·678 Games

Classical2499522 Games

Rapid250491 Games

Blitz2557110 Games

Statistics

678

Total

316

Wins

216

Draws

143

Losses

47%32%21%

Play Style

What you need to know before facing them

Elite accuracy: 93.9% average

High resilience (63%): Dangerous even when losing

Solid conversion: 91%

Very consistent (91%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (83% in 20 games)

Deep Analysis

Stockfish 18 · Classical games · 293 analyzed

Accuracy by phase

Opening96.5%

Middlegame93.6%

Endgame95.4%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

119 Games

Equal position95%

116 Games

Losing (-2 or more)90%

58 Games

Problematic Pieces

Which pieces cause most errors?

♖

19%

36 errors

♗

18%

34 errors

♙

18%

34 errors

♞

17%

32 errors

♕

17%

31 errors

♔

11%

20 errors

Critical Moment

When does the first serious error occur?

Move 33average

1-15

16-25

26-35

36-45

46+

38% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

5

9

6

11

6

8

6

5

9

abcdefgh

Many

Few

Critical squares

c511 err

c39 err

f69 err

e58 err

b76 err

c5/c3 concentrate most errors. Force decisions in those zones.

Recent Games

D

Movsesian, Julia2203

TCh-AUT Rapid 2026 · 17 May 2026

½-½

W

Benedikt, Noah2164

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Warmerdam, Max2520

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Paszewski, Mateusz2400

TCh-AUT Rapid 2026 · 17 May 2026

0-1

L

Raczek, Krzysztof2487

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Balint, Peter2420

TCh-AUT Rapid 2026 · 17 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

Caro-Kann: Advance

76.9%

13 Games·Wins

1.e4 c6 2.d4 d5 3.e5

Sicilian: e6 Systems

59.1%

22 Games·Wins

1.e4 c5 2.Nf3 e6

Black

Italian: Two Knights

61.5%

13 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

Ruy Lopez: Morphy

52.9%

17 Games·Wins

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

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#18Bc8??

Tactics

vs Dotzer

OTB·2025

▶

#18Nd5??

Tactics

vs Salna

Blitz·2025

▶

#40Ne3??

Tactics

vs Kovalenko

Blitz·2025

▶

#46b3??

Endgame

vs Kovalenko

Blitz·2025

▶

#81Ra8??

Endgame

vs Paseka

OTB·2025

▶

#28Nxc6??

Tactics

vs Risteski

Rapid·2025

▶

#38Be4??

Tactics

vs Brodowski

Blitz·2025

▶

#44Bf7??

Endgame

vs Unuk

Blitz·2025

▶

#51Rh4??

Endgame

vs Martynov

Blitz·2025

▶

#18Nf3??

Tactics

vs Horvath

Blitz·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

328 Games

51%32%17%

Move	Games	Performance	%
1.e4	268		67%
1.d4	24		65%
1.Nf3 Strong	20		83%
1.c4	9		61%
1.g3	6		58%
1.b3	1		50%

1.e4

67%

268

1.d4

65%

24

1.Nf3

83%

20

1.c4

61%

9

1.g3

58%

6

1.b3

50%

1

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