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

Berg, Vadim Daskevich

NOR NOR·Born 1986·FIDE #11601965·321 Games

Classical2445308 Games

Rapid24229 Games

Blitz24454 Games

Statistics

321

Total

114

Wins

75

Draws

132

Losses

36%23%41%

Play Style

What you need to know before facing them

Plays 26.2% better with black

Inconsistent (54%): Can have off days

Dominates 1.Nf3 ♔ (70% in 30 games)

Vulnerable to 1.d4 ♚ (only 39%)

Deep Analysis

Stockfish 18 · Classical games · 2 analyzed

Accuracy by phase

Opening95.0%

Middlegame86.7%

Endgame87.7%

Clutch Factor

Performance under pressure

+7%

Winning (+2 or more)85%

0 Games

Equal position85%

0 Games

Losing (-2 or more)78%

2 Games

Problematic Pieces

Which pieces cause most errors?

♞

50%

1 errors

♙

50%

1 errors

♗

0%

0 errors

♔

0%

0 errors

♕

0%

0 errors

♖

0%

0 errors

Critical Moment

When does the first serious error occur?

Move 26average

1-15

16-25

26-35

36-45

46+

100% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

1

1

abcdefgh

Many

Few

Critical squares

b41 err

f51 err

b4/f5 concentrate most errors. Force decisions in those zones.

Recent Games

L

Demchenko, Maksim Dm2100

Titled Tue 29th Jul Early · 29 Jul 2025

1-0

W

Bilochenko, Matvii2005

Titled Tue 29th Jul Early · 29 Jul 2025

0-1

L

Papasimakopoulos, Alexandros2366

Titled Tue 29th Jul Early · 29 Jul 2025

0-1

L

Yevchenko,A2276

Titled Tue 29th Jul Early · 29 Jul 2025

1-0

W

Angulo Perez, Sebastian2026

Titled Tue 29th Jul Early · 29 Jul 2025

1-0

L

Murthy, Pappu1836

Titled Tue 29th Jul Early · 29 Jul 2025

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Italian: Giuoco Piano

77.8%

9 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Sicilian: e6 Systems

75.0%

8 GamesLow sample·Loses

1.e4 c5 2.Nf3 e6

Black

Sicilian: Najdorf

56.3%

16 Games·Loses

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6

Strengths

AVOID

White

No consistent strengths detected as White

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

1 errors

▶

#27Nb4??

Tactics

vs Nakamura

OTB·2010

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2025

2024

2015

2013

2012

2010

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

161 Games

46%17%37%

Move	Games	Performance	%
1.e4	80		41%
1.d4	51		66%
1.Nf3	30		70%

1.e4

41%

80

1.d4

66%

51

1.Nf3

70%

30

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