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

P

IM

Petitcunot, Pierre

FRA FRA·Born 1980·FIDE #612200·143 Games

Classical2462136 Games

Rapid24417 Games

Blitz24190 Games

Play against Petitcunot, Pierre's Twin

PRO

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

143 games analyzed

Statistics

Total

143

Wins

67

Draws

41

Losses

35

47%29%24%

Deep Analysis

Stockfish 18 · Classical games · 0 analyzed

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

Insufficient data

Problematic Pieces — Which pieces cause most errors?

Insufficient data

Critical Moment — When does the first serious error occur?

Insufficient data

Error Heatmap — Where do most errors occur?

Insufficient data

Openings

Based on player games

No clear weaknesses!

Critical Blunders

1 errors · Stockfish

#33Bd3??Tacticsvs NikolovRapid · 2020

Recent Games

143 Games

W

Nguyen-Cadoret, Nathan(2193)

2. Cappelle Rapid 2020 · 29 Feb 2020

0-1

L

Nikolov, Momchil(2539)

2. Cappelle Rapid 2020 · 29 Feb 2020

0-1

W

Leclerc, Evann(1470)

2. Cappelle Rapid 2020 · 29 Feb 2020

0-1

W

Olcum, Ahmet(2284)

2. Cappelle Rapid 2020 · 29 Feb 2020

1-0

W

Shchekachev, Andrei(2529)

2. Cappelle Rapid 2020 · 29 Feb 2020

1-0

W

Velten, Paul(2483)

2. Cappelle Rapid 2020 · 29 Feb 2020

1-0

Endgame Statistics

PRO1 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

1 endgame categories analyzed — discover where they collapse under pressure

Repertoire

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Move arrowsmost-played moves

Starting Position

Stockfish

75 Games

51%33%16%

Move	Games	Performance	%
1.e4	74		68%
1.d4 Weak	1		0%

MoveGamesPerformance%

1.e4

74

68%

1.d4Weak

1

0%

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