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

Carnicelli, Valerio

ITA ITA·Born 2000·FIDE #856185·1,168 Games

Classical24361,142 Games

Rapid239226 Games

Blitz23170 Games

Statistics

1168

Total

494

Wins

230

Draws

430

Losses

42%20%37%

Play Style

What you need to know before facing them

Elite accuracy: 92.4% average

Solid conversion: 82%

Very consistent (85%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (67% in 27 games)

Vulnerable to 1.Nf3 ♚ (only 41%)

Deep Analysis

Stockfish 18 · Classical games · 285 analyzed

Accuracy by phase

Opening96.6%

Middlegame92.9%

Endgame94.4%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

113 Games

Equal position93%

99 Games

Losing (-2 or more)90%

73 Games

Problematic Pieces

Which pieces cause most errors?

♙

23%

67 errors

♖

22%

64 errors

♔

18%

53 errors

♗

13%

39 errors

♕

13%

37 errors

♞

11%

32 errors

Critical Moment

When does the first serious error occur?

Move 46average

1-15

16-25

26-35

36-45

46+

52% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

9

7

11

10

12

12

7

10

8

7

abcdefgh

Many

Few

Critical squares

c512 err

f512 err

f711 err

b410 err

f610 err

c5/f5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Gaydym, Michail2337

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Radnaev, Leo2253

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Ozturk, Efe Hakan2047

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Schnaider, Ilan2431

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Alonso, Leonardo Espinha2099

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Aynaoglu, Efe2193

Titled Tue 19th May 2026 · 19 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: Open

40.9%

66 Games·Loses

1.e4 c5 2.Nf3 d6 3.d4

Italian: Fried Liver

41.7%

12 Games·Loses

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

Black

Reti: Double Fianchetto

63.6%

11 Games·Loses

1.Nf3 Nf6 2.g3 g6

Ruy Lopez: Morphy

60.0%

15 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

Strengths

AVOID

White

Reti: Double Fianchetto

70.0%

10 Games·Wins

1.Nf3 Nf6 2.g3 g6

Sicilian: Taimanov

64.7%

17 Games·Wins

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6

Black

Sicilian: d6 Systems

76.0%

25 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#37Nc2??

Tactics

vs Zamengo

OTB·2026

▶

#30Re2??

Tactics

vs Lumachi

OTB·2025

▶

#42c8=Q??

Endgame

vs Krastev

OTB·2025

▶

#45Rh2??

Endgame

vs Krasteva

OTB·2025

▶

#12Qxe6??

Tactics

vs Cecconi

OTB·2025

▶

#32Bg5+??

Tactics

vs Subelj

OTB·2025

▶

#13dxe5??

Tactics

vs Vasquez Toledo

OTB·2025

▶

#48Bf5??

Endgame

vs Gonella

OTB·2025

▶

#30O-O??

Tactics

vs Lodici

OTB·2025

▶

#29Rd3??

Tactics

vs Ribeiro

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

593 Games

47%18%35%

Move	Games	Performance	%
1.e4	494		55%
1.b3	47		53%
1.Nf3	27		67%
1.d4	22		66%
1.c4 Strong	3		100%

1.e4

55%

494

1.b3

53%

47

1.Nf3

67%

27

1.d4

66%

22

1.c4

100%

3

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