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

Fedoseev, Vladimir

SLO SLO·Born 1995·FIDE #24130737·5,227 Games

Classical27003,894 Games

Rapid2690628 Games

Blitz2756753 Games

Statistics

5227

Total

2842

Wins

1270

Draws

1113

Losses

54%24%21%

Play Style

What you need to know before facing them

Elite accuracy: 94.3% average

Very consistent (88%)

Very precise: only 0.0 blunders/game

Dominates 1.g3 ♔ (81% in 45 games)

Deep Analysis

Stockfish 18 · Classical games · 609 analyzed

Accuracy by phase

Opening96.4%

Middlegame94.0%

Endgame95.8%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)95%

215 Games

Equal position96%

188 Games

Losing (-2 or more)90%

97 Games

Problematic Pieces

Which pieces cause most errors?

♖

21%

63 errors

♙

18%

55 errors

♕

18%

53 errors

♞

15%

44 errors

♗

14%

41 errors

♔

14%

43 errors

Critical Moment

When does the first serious error occur?

Move 39average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

10

10

10

9

11

12

15

9

8

10

abcdefgh

Many

Few

Critical squares

g415 err

f412 err

d411 err

d310 err

d510 err

g4/f4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Weetik, Vjacheslav2423

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

1-0

W

To, Nhat Minh2315

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

0-1

D

Atanasov, Anthony2439

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

½-½

L

Mahdavi, Reza2490

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

1-0

L

Shuvalova, Polina2502

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

1-0

L

Grebnev, Aleksey2621

1st 3-0 Thu 26th Mar 2026 · 26 Mar 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

English: g3 System

50.0%

8 GamesLow sample·Loses

1.c4 e5 2.g3 Nf6

Black

Reti: Reversed London

62.5%

8 GamesLow sample·Loses

1.Nf3 d5 2.g3 c6

Strengths

AVOID

White

Reti: Double Fianchetto

73.7%

19 Games·Wins

1.Nf3 Nf6 2.g3 g6

Sicilian: d6 Systems

55.1%

156 Games·Wins

1.e4 c5 2.Nf3 d6

Black

Sicilian: d6 Systems

53.6%

267 Games·Wins

1.e4 c5 2.Nf3 d6

Sicilian: e6 Systems

70.8%

48 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#46Ng4??

Endgame

vs Yakubboev

Blitz·2025

▶

#27Qf4??

Tactics

vs Nepomniachtchi

Blitz·2025

▶

#25Qb5??

Tactics

vs Yakubboev

Rapid·2025

▶

#38Kf1??

Tactics

vs Yakubboev

Rapid·2025

▶

#76Ng4+??

Endgame

vs Nepomniachtchi

OTB·2025

▶

#37c4??

Tactics

vs Gorshtein

OTB·2025

▶

#44Re1+??

Endgame

vs Alekseev

OTB·2025

▶

#19Qf8??

Tactics

vs Wojtaszek

OTB·2025

▶

#38Rh4??

Tactics

vs Bjerre

OTB·2025

▶

#31Nf5??

Tactics

vs Pechac

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

2632 Games

58%24%18%

Move	Games	Performance	%
1.e4 Strong	1150		70%
1.d4	1024		69%
1.Nf3 Strong	238		73%
1.c4	87		64%
1.g3 Strong	45		81%
1.b3 Strong	23		76%
1.a3	15		70%
1.f4	13		58%
1.h3 Strong	8		75%
1.g4 Strong	6		92%
1.h4	5		60%
1.b4 Strong	4		88%
1.e3	4		63%
1.Nc3	3		67%
1.a4 Strong	3		100%
1.Nh3 Strong	2		100%
1.c3 Strong	1		100%
1.d3 Weak	1		0%

1.e4

70%

1150

1.d4

69%

1024

1.Nf3

73%

238

1.c4

64%

87

1.g3

81%

45

1.b3

76%

23

1.a3

70%

15

1.f4

58%

13

1.h3

75%

8

1.g4

92%

6

1.h4

60%

5

1.b4

88%

4

1.e3

63%

4

1.Nc3

67%

3

1.a4

100%

3

1.Nh3

100%

2

1.c3

100%

1

1.d3

0%

1

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