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

Lampert, Jonas

GER GER·Born 1997·FIDE #1303759·658 Games

Classical2536658 Games

Rapid—0 Games

Blitz24920 Games

Statistics

658

Total

251

Wins

255

Draws

151

Losses

38%39%23%

Play Style

What you need to know before facing them

Elite accuracy: 95.0% average

Very consistent (95%)

Very precise: only 0.0 blunders/game

Dominates 1.d4 ♔ (66% in 145 games)

Vulnerable to 1.c4 ♚ (only 43%)

Deep Analysis

Stockfish 18 · Classical games · 7 analyzed

Accuracy by phase

Opening97.1%

Middlegame95.4%

Endgame95.7%

Clutch Factor

Performance under pressure

+10%

Winning (+2 or more)95%

3 Games

Equal position95%

4 Games

Losing (-2 or more)85%

0 Games

Problematic Pieces

Which pieces cause most errors?

♔

33%

1 errors

♕

33%

1 errors

♖

33%

1 errors

♗

0%

0 errors

♞

0%

0 errors

♙

0%

0 errors

Critical Moment

When does the first serious error occur?

Move 30average

1-15

16-25

26-35

36-45

46+

Error Heatmap

Where do most errors occur?

1

1

1

abcdefgh

Many

Few

Critical squares

b71 err

c41 err

e71 err

b7/c4 concentrate most errors. Force decisions in those zones.

Recent Games

D

Efimenko, Zahar2562

1. BL Pauli · 21 Mar 2026

½-½

L

Paravyan, David2619

Titled Tue 25th Mar Late · 25 Mar 2025

1-0

W

Kavutskiy, Kostya2351

Titled Tue 25th Mar Late · 25 Mar 2025

0-1

D

Harikrishna, Pentala2704

Titled Tue 25th Mar Late · 25 Mar 2025

½-½

L

Bortnyk, Olexandr2601

Titled Tue 25th Mar Late · 25 Mar 2025

0-1

L

Moussard, Jules2592

Titled Tue 25th Mar Late · 25 Mar 2025

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

Grünfeld

75.0%

12 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 d5

King's Indian: Classical

71.4%

14 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2

Black

Italian: Two Knights

50.0%

14 Games·Wins

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

Scotch: Classical

50.0%

10 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5

Critical Blunders

Tactical errors analyzed with Stockfish

No blunders recorded

Endgame Statistics

4 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2026

2025

2024

2023

2022

2020

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

335 Games

41%39%20%

Move	Games	Performance	%
1.e4	189		56%
1.d4	145		66%
1.Nf3	1		50%

1.e4

56%

189

1.d4

66%

145

1.Nf3

50%

1

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