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

IM

Bournel, Antoine

FRA FRA·Born 2002·FIDE #26093553·962 Games

Classical2430899 Games

Rapid235439 Games

Blitz225024 Games

Statistics

962

Total

441

Wins

154

Draws

366

Losses

46%16%38%

Play Style

What you need to know before facing them

Elite accuracy: 92.9% average

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (82% in 14 games)

Vulnerable to 1.c4 ♚ (only 48%)

Deep Analysis

Stockfish 18 · Classical games · 219 analyzed

Accuracy by phase

Opening96.9%

Middlegame93.1%

Endgame95.0%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

80 Games

Equal position94%

77 Games

Losing (-2 or more)90%

62 Games

Problematic Pieces

Which pieces cause most errors?

♖

31%

67 errors

♕

20%

43 errors

♙

17%

36 errors

♞

15%

31 errors

♔

9%

19 errors

♗

8%

17 errors

Critical Moment

When does the first serious error occur?

Move 50average

1-15

16-25

26-35

36-45

46+

53% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

7

7

9

12

8

7

9

5

5

abcdefgh

Many

Few

Critical squares

e512 err

e49 err

e69 err

f58 err

c67 err

e5/e4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Liaw, Ryan1970

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Donchenko, Alexander2645

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Szpar, Milosz2496

Titled Tue 26th May 2026 · 26 May 2026

0-1

D

Makridis, Dimitrios2311

Titled Tue 26th May 2026 · 26 May 2026

½-½

L

Niemann, Hans Moke2728

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Atanasov, Anthony2470

Titled Tue 26th May 2026 · 26 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

Ruy Lopez

62.5%

8 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5

Sicilian: d6 Systems

53.8%

26 Games·Loses

1.e4 c5 2.Nf3 d6

Strengths

AVOID

White

French Defense

64.3%

14 Games·Wins

1.e4 e6 2.d4 d5

Sicilian: 2...Nc6

63.6%

11 Games·Wins

1.e4 c5 2.Nf3 Nc6

Black

Sicilian: e6 Systems

50.0%

14 Games·Wins

1.e4 c5 2.Nf3 e6

Nimzo-Indian: Rubinstein

46.2%

13 Games·Wins

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#37Nxb7??

Tactics

vs Zhalmakhanov

OTB·2025

▶

#32Re6??

Tactics

vs Herman Gamazo

OTB·2025

▶

#68Bh7??

Endgame

vs Khalilova

OTB·2025

▶

#57Qe1??

Endgame

vs Coles

OTB·2025

▶

#35Rf8??

Tactics

vs Fedorchuk

OTB·2025

▶

#23Qf8??

Tactics

vs Visakh N R

OTB·2025

▶

#65Kg6??

Endgame

vs Macon

OTB·2025

▶

#31Ne6??

Tactics

vs Bassini

OTB·2025

▶

#72Kh1??

Endgame

vs Moussard

OTB·2025

▶

#58Rxe5??

Endgame

vs Pap

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

470 Games

49%17%34%

Move	Games	Performance	%
1.d4	279		57%
1.e4	100		61%
1.Nf3	38		49%
1.a3	17		56%
1.c4 Strong	14		82%
1.c3 Weak	7		14%
1.g3	4		38%
1.f4	4		50%
1.e3 Strong	2		100%
1.b4 Weak	1		0%
1.Nc3 Weak	1		0%
1.d3	1		50%
1.a4 Strong	1		100%
1.b3 Strong	1		100%

1.d4

57%

279

1.e4

61%

100

1.Nf3

49%

38

1.a3

56%

17

1.c4

82%

14

1.c3

14%

7

1.g3

38%

4

1.f4

50%

4

1.e3

100%

2

1.b4

0%

1

1.Nc3

0%

1

1.d3

50%

1

1.a4

100%

1

1.b3

100%

1

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