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

Ragger, Markus

AUT AUT·Born 1988·FIDE #1610856·3,403 Games

Classical25792,998 Games

Rapid2607196 Games

Blitz2562233 Games

Statistics

3403

Total

1451

Wins

1351

Draws

599

Losses

43%40%18%

Play Style

What you need to know before facing them

Elite accuracy: 94.9% average

Solid conversion: 93%

Very consistent (91%)

Very precise: only 0.0 blunders/game

Dominates 1.c4 ♔ (72% in 18 games)

Deep Analysis

Stockfish 18 · Classical games · 482 analyzed

Accuracy by phase

Opening97.1%

Middlegame94.6%

Endgame95.9%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)95%

142 Games

Equal position96%

274 Games

Losing (-2 or more)90%

66 Games

Problematic Pieces

Which pieces cause most errors?

♖

27%

61 errors

♙

17%

38 errors

♕

16%

36 errors

♔

14%

31 errors

♞

14%

31 errors

♗

12%

28 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

42% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

7

8

6

8

7

6

8

6

8

abcdefgh

Many

Few

Critical squares

b48 err

d38 err

d58 err

e28 err

e47 err

b4/d3 concentrate most errors. Force decisions in those zones.

Recent Games

W

Arul, Sharvesh2019

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

L

Potapova, Margarita2243

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Ambartsumova, Karina2385

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Smail, Benedict2078

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Pribelszky, Bence2375

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Obrusnik, Michal2246

2nd 3-0 Thu 28th May 2026 · 28 May 2026

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

Sicilian: e6 Systems

70.6%

51 Games·Wins

1.e4 c5 2.Nf3 e6

King's Indian: Classical

64.1%

39 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5

Black

Italian: Two Knights

52.5%

99 Games·Wins

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

Italian: Fried Liver

56.5%

23 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#24Qb6??

Tactics

vs Mahdavi

OTB·2025

▶

#34f4??

Tactics

vs Ambartsumova

OTB·2025

▶

#24Nd3??

Tactics

vs Bacrot

OTB·2025

▶

#22Qa2??

Tactics

vs Aravindh

OTB·2025

▶

#32Rxc3??

Tactics

vs Ohanyan

OTB·2025

▶

#17O-O??

Tactics

vs Liu

OTB·2025

▶

#25Bg5+??

Tactics

vs Esmeraldas Huachi

OTB·2025

▶

#27Ne4??

Tactics

vs Taher

OTB·2025

▶

#80Rg1??

Endgame

vs Cieslak

OTB·2025

▶

#33Qe4??

Tactics

vs Tureshbayev

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

1713 Games

48%37%15%

Move	Games	Performance	%
1.e4	744		67%
1.d4	719		67%
1.Nf3	232		67%
1.c4 Strong	18		72%

1.e4

67%

744

1.d4

67%

719

1.Nf3

67%

232

1.c4

72%

18

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