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

Caruana, Fabiano

#3 World

USA USA·Born 1992·FIDE #2020009·7,070 Games

Classical27925,396 Games

Rapid2723766 Games

Blitz27811,129 Games

Statistics

7070

Total

3370

Wins

2208

Draws

1487

Losses

48%31%21%

Play Style

What you need to know before facing them

Elite accuracy: 94.0% average

High resilience (56%): Dangerous even when losing

Solid conversion: 90%

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♔ (83% in 43 games)

Vulnerable to 1.b3 ♚ (only 43%)

Deep Analysis

Stockfish 18 · Classical games · 2,798 analyzed

Accuracy by phase

Opening96.7%

Middlegame93.8%

Endgame95.3%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

228 Games

Equal position94%

178 Games

Losing (-2 or more)90%

94 Games

Problematic Pieces

Which pieces cause most errors?

♖

26%

115 errors

♕

19%

83 errors

♙

17%

73 errors

♗

15%

64 errors

♞

14%

62 errors

♔

9%

41 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

13

12

13

20

13

13

16

10

11

10

abcdefgh

Many

Few

Critical squares

d420 err

h416 err

c413 err

d513 err

e413 err

d4/h4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Stanojevic, Ilija2239

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Bortnyk, Olexandr2604

Titled Tue 26th May 2026 · 26 May 2026

1-0

D

Demchenko, Anton2611

Titled Tue 26th May 2026 · 26 May 2026

½-½

W

Ioannidis, Evgenios2473

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Karttunen, Mika2503

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Liu, Casper2336

Titled Tue 26th May 2026 · 26 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

English: g3 System

41.7%

12 Games·Loses

1.c4 e5 2.g3 Nf6

Black

Italian: Fried Liver

55.6%

9 GamesLow sample·Loses

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

Strengths

AVOID

White

English: Symmetrical

78.6%

14 Games·Wins

1.c4 c5 2.Nf3 Nf6

Slav: Semi-Slav

73.3%

15 Games·Wins

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Black

French: Classical

70.6%

17 Games·Wins

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

King's Indian: Main Line

70.0%

10 Games·Wins

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

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#33Bd6??

Tactics

vs Xiong

OTB·2026

▶

#56e3+??

Endgame

vs Materia

OTB·2026

▶

#39Bf5??

Tactics

vs Kollars

OTB·2026

▶

#99Rf6+??

Endgame

vs Nakamura

OTB·2026

▶

#61h5??

Endgame

vs Dubnevych

OTB·2026

▶

#37Ra4??

Tactics

vs Ashraf

OTB·2026

▶

#35Re2??

Tactics

vs Grischuk

Blitz·2025

▶

#37b5??

Tactics

vs Vachier-Lagrave

Blitz·2025

▶

#52Bf3??

Endgame

vs Pranesh M

Blitz·2025

▶

#33R7xg6??

Tactics

vs Murzin

Blitz·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

3574 Games

52%29%19%

Move	Games	Performance	%
1.e4	2057		66%
1.d4	760		67%
1.c4	421		70%
1.Nf3	212		62%
1.b3 Strong	43		83%
1.g3 Strong	19		71%
1.e3 Strong	14		79%
1.Nc3 Strong	10		80%
1.b4 Strong	9		72%
1.d3	7		64%
1.f4 Strong	6		100%
1.c3 Strong	6		100%
1.g4 Strong	4		75%
1.h4 Strong	2		100%
1.a3 Strong	2		100%
1.h3 Strong	1		100%
1.Nh3 Strong	1		100%

1.e4

66%

2057

1.d4

67%

760

1.c4

70%

421

1.Nf3

62%

212

1.b3

83%

43

1.g3

71%

19

1.e3

79%

14

1.Nc3

80%

10

1.b4

72%

9

1.d3

64%

7

1.f4

100%

6

1.c3

100%

6

1.g4

75%

4

1.h4

100%

2

1.a3

100%

2

1.h3

100%

1

1.Nh3

100%

1

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