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

Moussard, Jules

FRA FRA·Born 1995·FIDE #642908·3,290 Games

Classical26132,840 Games

Rapid2620220 Games

Blitz2637274 Games

Statistics

3290

Total

1746

Wins

822

Draws

720

Losses

53%25%22%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

High resilience (62%): Dangerous even when losing

Solid conversion: 91%

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♔ (81% in 32 games)

Deep Analysis

Stockfish 18 · Classical games · 748 analyzed

Accuracy by phase

Opening96.5%

Middlegame93.7%

Endgame95.4%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)95%

228 Games

Equal position95%

190 Games

Losing (-2 or more)90%

82 Games

Problematic Pieces

Which pieces cause most errors?

♖

21%

81 errors

♙

18%

68 errors

♕

18%

69 errors

♗

15%

57 errors

♔

15%

58 errors

♞

14%

53 errors

Critical Moment

When does the first serious error occur?

Move 43average

1-15

16-25

26-35

36-45

46+

35% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

10

14

12

11

16

14

11

13

16

11

abcdefgh

Many

Few

Critical squares

e516 err

f416 err

d714 err

f514 err

e413 err

e5/f4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Atwell, Rose2383

3rd 3-0 Thu 21st May 2026 · 21 May 2026

0-1

W

Guo,Felix2200

3rd 3-0 Thu 21st May 2026 · 21 May 2026

1-0

W

Achuthan, Aryan2195

3rd 3-0 Thu 21st May 2026 · 21 May 2026

1-0

D

Nguyen, Ngoc Truong Son2600

3rd 3-0 Thu 21st May 2026 · 21 May 2026

½-½

W

Antonyan, Hamlet2108

3rd 3-0 Thu 21st May 2026 · 21 May 2026

1-0

W

Do, Hoang Minh Tho1968

3rd 3-0 Thu 21st May 2026 · 21 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

English: g3 System

66.7%

9 GamesLow sample·Loses

1.c4 e5 2.g3 Nf6

Black

Reti: Double Fianchetto

69.2%

13 Games·Loses

1.Nf3 Nf6 2.g3 d5

Strengths

AVOID

White

1.b3 e5 2.Bb2 Nc6

100.0%

10 Games·Wins

1.b3 e5 2.Bb2 Nc6

Reti: Double Fianchetto

73.3%

15 Games·Wins

1.Nf3 Nf6 2.g3 g6

Black

Sicilian: d6 Systems

53.5%

288 Games·Wins

1.e4 c5 2.Nf3 d6

Queen's Gambit Declined

73.3%

30 Games·Wins

1.d4 d5 2.c4 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#84Kc6??

Endgame

vs Mendonca

Blitz·2025

▶

#24Nxf2??

Tactics

vs Ponomariov

Blitz·2025

▶

#51f7??

Endgame

vs Aronian

Blitz·2025

▶

#21Rxe4??

Tactics

vs Anton Guijarro

Blitz·2025

▶

#27Re8??

Tactics

vs Gurel

Blitz·2025

▶

#44Nxd6??

Endgame

vs Sahidi

Rapid·2025

▶

#51g5??

Endgame

vs Pranav Anand

Blitz·2025

▶

#72Kc7??

Endgame

vs Salinas Herrera

Blitz·2025

▶

#38Rf1??

Tactics

vs Onyshchuk

OTB·2025

▶

#41f5??

Endgame

vs Dudin

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

1665 Games

56%25%19%

Move	Games	Performance	%
1.e4	1048		68%
1.Nf3 Strong	297		70%
1.c4	150		68%
1.g3	37		55%
1.f4 Strong	37		70%
1.b3 Strong	32		81%
1.d4	30		67%
1.a3 Strong	14		79%
1.Nc3 Strong	4		75%
1.Nh3 Weak	4		0%
1.b4 Strong	3		83%
1.d3 Strong	3		100%
1.c3	2		50%
1.g4 Strong	1		100%
1.e3 Strong	1		100%
1.a4 Strong	1		100%
1.f3	1		50%

1.e4

68%

1048

1.Nf3

70%

297

1.c4

68%

150

1.g3

55%

37

1.f4

70%

37

1.b3

81%

32

1.d4

67%

30

1.a3

79%

14

1.Nc3

75%

4

1.Nh3

0%

4

1.b4

83%

3

1.d3

100%

3

1.c3

50%

2

1.g4

100%

1

1.e3

100%

1

1.a4

100%

1

1.f3

50%

1

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