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

Carlsson, Pontus

SWE SWE·Born 1982·FIDE #1705814·1,268 Games

Classical24501,138 Games

Rapid237647 Games

Blitz244883 Games

Statistics

1268

Total

500

Wins

452

Draws

316

Losses

39%36%25%

Play Style

What you need to know before facing them

Elite accuracy: 92.9% average

Low resilience (32%): Doesn't save lost positions

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.e4 ♔ (64% in 619 games)

Vulnerable to 1.Nf3 ♚ (only 43%)

Deep Analysis

Stockfish 18 · Classical games · 43 analyzed

Accuracy by phase

Opening96.1%

Middlegame92.4%

Endgame94.5%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)95%

11 Games

Equal position94%

21 Games

Losing (-2 or more)89%

11 Games

Problematic Pieces

Which pieces cause most errors?

♖

32%

11 errors

♗

15%

5 errors

♞

15%

5 errors

♙

15%

5 errors

♕

15%

5 errors

♔

9%

3 errors

Critical Moment

When does the first serious error occur?

Move 32average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

2

2

2

1

3

2

2

1

1

1

abcdefgh

Many

Few

Critical squares

e53 err

b42 err

e82 err

f42 err

f72 err

e5/b4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Vemparala, Nikash2150

57. International Chess F... · 21 Jul 2024

0-1

W

Lyutsinger, Iren2088

57. International Chess F... · 21 Jul 2024

1-0

W

Sasikiran, Krishnan2581

57. International Chess F... · 21 Jul 2024

0-1

W

Stevens, Christian2241

57. International Chess F... · 21 Jul 2024

1-0

L

Jumabayev, Rinat2565

57. International Chess F... · 21 Jul 2024

0-1

L

Xiao, Tong(QD)2518

57. International Chess F... · 21 Jul 2024

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

English vs 1...e5

62.5%

8 GamesLow sample·Loses

1.c4 e5 2.Nc3 Bb4

Strengths

AVOID

White

Ruy Lopez: Berlin

73.3%

15 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6

Scotch: Classical

69.2%

13 Games·Wins

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

Black

Sicilian: Closed

47.1%

17 Games·Wins

1.e4 c5 2.Nc3 Nc6

French: Classical

46.2%

13 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#28Rb5??

Tactics

vs Degtiarev

Blitz·2024

▶

#88Ne4??

Endgame

vs Xiao

Blitz·2024

▶

#41Bb6??

Endgame

vs Hafiz

Blitz·2024

▶

#73Rg8??

Endgame

vs Polak

OTB·2022

▶

#28Rb8+??

Tactics

vs Cernousek

OTB·2022

▶

#19d5??

Tactics

vs Nasuta

Blitz·2021

▶

#42b5??

Endgame

vs Sankalp Gupta

Blitz·2021

▶

#49Kf2??

Endgame

vs Kosakowski

Blitz·2021

▶

#57Ne3??

Endgame

vs Wieczorek

Blitz·2021

▶

#48c4??

Endgame

vs Jakubowski

Blitz·2021

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2024

2023

2022

2021

2020

2019

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

632 Games

46%37%17%

Move	Games	Performance	%
1.e4	619		64%
1.d4 Strong	9		78%
1.Nf3 Strong	4		75%

1.e4

64%

619

1.d4

78%

9

1.Nf3

75%

4

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