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

Moroni, Luca Jr

ITA ITA·Born 2000·FIDE #865834·940 Games

Classical2551867 Games

Rapid251745 Games

Blitz254354 Games

Statistics

940

Total

425

Wins

292

Draws

220

Losses

45%31%23%

Play Style

What you need to know before facing them

Elite accuracy: 94.2% average

High resilience (58%): Dangerous even when losing

Solid conversion: 94%

Very consistent (92%)

Very precise: only 0.0 blunders/game

Dominates 1.Nf3 ♚ (70% in 40 games)

Vulnerable to 1.c4 ♚ (only 48%)

Deep Analysis

Stockfish 18 · Classical games · 156 analyzed

Accuracy by phase

Opening95.9%

Middlegame93.9%

Endgame95.9%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

73 Games

Equal position95%

60 Games

Losing (-2 or more)91%

23 Games

Problematic Pieces

Which pieces cause most errors?

♕

26%

26 errors

♖

20%

20 errors

♔

18%

18 errors

♙

15%

15 errors

♞

11%

11 errors

♗

9%

9 errors

Critical Moment

When does the first serious error occur?

Move 44average

1-15

16-25

26-35

36-45

46+

33% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

3

4

6

6

4

3

5

4

4

3

abcdefgh

Many

Few

Critical squares

e56 err

g56 err

e35 err

f34 err

g34 err

e5/g5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Daneshvar, Bardiya2597

2026 Chesscom Open Play I... · 25 Mar 2026

0-1

W

Rustemov, Alexander2525

2026 Chesscom Open Play I... · 25 Mar 2026

0-1

L

Iniyan, Pa2590

2026 Chesscom Open Play I... · 25 Mar 2026

1-0

L

Anton Guijarro, David2666

2026 Chesscom Open Play I... · 25 Mar 2026

0-1

W

Rakhmanov, Aleksandr2590

2026 Chesscom Open Play I... · 25 Mar 2026

0-1

D

Maghsoodloo, Parham2708

2026 Chesscom Open Play I... · 25 Mar 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: d6 Systems

45.5%

11 Games·Loses

1.e4 c5 2.Nf3 d6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Queen's Gambit Declined

63.6%

11 Games·Wins

1.d4 d5 2.c4 e6

Black

Sicilian: d6 Systems

45.5%

33 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#35Qd4+??

Tactics

vs Maurizzi

OTB·2025

▶

#30h5??

Tactics

vs Nemeth

OTB·2025

▶

#13Qe3??

Tactics

vs Bisetto

OTB·2025

▶

#24Qc2+??

Tactics

vs Brunello

OTB·2025

▶

#60Kf4??

Endgame

vs Bellahcene

OTB·2025

▶

#50h3??

Endgame

vs Sadhwani

Blitz·2024

▶

#35Rh6??

Tactics

vs Matviishen

Blitz·2024

▶

#36Kf8??

Tactics

vs Safarli

Blitz·2024

▶

#62Rc6??

Endgame

vs Papasimakopoulos

Blitz·2024

▶

#23Rg5??

Tactics

vs Carnicelli

OTB·2024

Endgame Statistics

21 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

474 Games

52%28%20%

Move	Games	Performance	%
1.c4	149		69%
1.d4	134		69%
1.Nf3	98		67%
1.e4	90		59%
1.b3 Strong	3		83%

1.c4

69%

149

1.d4

69%

134

1.Nf3

67%

98

1.e4

59%

90

1.b3

83%

3

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