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

Tregubov, Pavel V.

FRA FRA·Born 1971·FIDE #4115341·4,115 Games

Classical25433,547 Games

Rapid2501267 Games

Blitz2450301 Games

Statistics

4115

Total

1731

Wins

1276

Draws

1106

Losses

42%31%27%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

Solid conversion: 83%

Very consistent (86%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♚ (71% in 12 games)

Deep Analysis

Stockfish 18 · Classical games · 182 analyzed

Accuracy by phase

Opening96.8%

Middlegame93.5%

Endgame94.2%

Clutch Factor

Performance under pressure

+3%

Winning (+2 or more)93%

53 Games

Equal position95%

77 Games

Losing (-2 or more)90%

52 Games

Problematic Pieces

Which pieces cause most errors?

♖

24%

35 errors

♙

19%

28 errors

♕

18%

27 errors

♗

14%

20 errors

♞

14%

20 errors

♔

12%

17 errors

Critical Moment

When does the first serious error occur?

Move 37average

1-15

16-25

26-35

36-45

46+

27% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

9

5

9

5

4

5

8

4

5

abcdefgh

Many

Few

Critical squares

c59 err

e69 err

b38 err

b66 err

d55 err

c5/e6 concentrate most errors. Force decisions in those zones.

Recent Games

W

Warmerdam, Max2520

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Donets, Tymur1583

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Unuk, Laura2289

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Movsesian, Sergei2594

TCh-AUT Rapid 2026 · 17 May 2026

1-0

L

Balint, Peter2420

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Hofmair, Klaus2148

TCh-AUT Rapid 2026 · 17 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Ruy Lopez: Steinitz Deferred

57.1%

14 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

Nimzo-Indian: Fischer

43.8%

16 Games·Loses

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6

Black

Reti: Double Fianchetto

66.7%

15 Games·Loses

1.Nf3 Nf6 2.g3 c5

Nimzo-Indian: Rubinstein

57.1%

42 Games·Loses

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

Strengths

AVOID

White

Sicilian: d6 Systems

61.8%

131 Games·Wins

1.e4 c5 2.Nf3 d6

Sicilian: e6 Systems

62.8%

78 Games·Wins

1.e4 c5 2.Nf3 e6

Black

French: Exchange

70.0%

10 Games·Wins

1.e4 e6 2.d4 d5 3.exd5

Sicilian: Closed

54.8%

42 Games·Wins

1.e4 c5 2.Nc3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#59Nxe8??

Endgame

vs Koch

OTB·2026

▶

#39Bxd5??

Tactics

vs Kantans

OTB·2026

▶

#36Rcxe6??

Tactics

vs Pranesh M

OTB·2024

▶

#46Rb2+??

Endgame

vs Derraugh

Blitz·2024

▶

#19Qc3??

Tactics

vs Sai Krishna G V

Blitz·2024

▶

#31Qxf3??

Tactics

vs Zomorrodian

Blitz·2024

▶

#46Ra6??

Endgame

vs Mai

Blitz·2024

▶

#51g4??

Endgame

vs Di Nicolantonio

Rapid·2023

▶

#26Kd7??

Tactics

vs Texier

Rapid·2023

▶

#52d2??

Endgame

vs Bacrot

Blitz·2023

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

2074 Games

49%29%22%

Move	Games	Performance	%
1.d4	1210		64%
1.e4	751		64%
1.Nf3	69		67%
1.c4	44		57%

1.d4

64%

1210

1.e4

64%

751

1.Nf3

67%

69

1.c4

57%

44

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