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

Diaz Perez, Michel Alejandro

CUB CUB·Born 1994·FIDE #3517179·1,304 Games

Classical24251,280 Games

Rapid24570 Games

Blitz236224 Games

Statistics

1304

Total

643

Wins

221

Draws

440

Losses

49%17%34%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

Solid conversion: 88%

Very consistent (91%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (70% in 15 games)

Vulnerable to 1.b3 ♚ (only 32%)

Deep Analysis

Stockfish 18 · Classical games · 248 analyzed

Accuracy by phase

Opening96.7%

Middlegame93.4%

Endgame95.2%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

120 Games

Equal position95%

69 Games

Losing (-2 or more)90%

59 Games

Problematic Pieces

Which pieces cause most errors?

♖

24%

59 errors

♞

18%

45 errors

♙

16%

40 errors

♕

16%

40 errors

♗

14%

34 errors

♔

12%

30 errors

Critical Moment

When does the first serious error occur?

Move 41average

1-15

16-25

26-35

36-45

46+

42% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

7

9

7

9

8

7

8

12

10

8

abcdefgh

Many

Few

Critical squares

d312 err

e310 err

d59 err

e79 err

c18 err

d3/e3 concentrate most errors. Force decisions in those zones.

Recent Games

L

Muzis, Renars2146

Titled Tue 26th May 2026 · 26 May 2026

1-0

L

Kazakouski, Valery2584

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Pournami S1837

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Volovich, Vasily2177

Titled Tue 26th May 2026 · 26 May 2026

0-1

W

Arkadan, Adib2215

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Dupuis, Denis K2217

Titled Tue 26th May 2026 · 26 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Grünfeld

42.1%

19 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 d5

King's Indian: Classical

41.2%

17 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2

Black

Sicilian: Rossolimo

55.6%

9 GamesLow sample·Loses

1.e4 c5 2.Nf3 Nc6 3.Bb5

Strengths

AVOID

White

Reti vs King's Indian

84.6%

13 Games·Wins

1.Nf3 Nf6 2.c4 g6

Ruy Lopez: Closed

58.3%

12 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7

Black

Caro-Kann: Exchange

76.9%

13 Games·Wins

1.e4 c6 2.d4 d5 3.exd5

Ruy Lopez: Exchange

50.0%

10 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#30Qh1+??

Tactics

vs Zacarias Rodriguez

OTB·2025

▶

#33Bd3??

Tactics

vs Castro Castro

OTB·2025

▶

#27Nxh3+??

Tactics

vs Biastoch

OTB·2025

▶

#25Nce5??

Tactics

vs Galchenko

OTB·2025

▶

#20Nxf2??

Tactics

vs Castro Castro

OTB·2025

▶

#27Ne6??

Tactics

vs Dixit

OTB·2025

▶

#22Nd3??

Tactics

vs Isaev

OTB·2025

▶

#63Qe3??

Endgame

vs Zhigalko

OTB·2025

▶

#67Ke3??

Endgame

vs Alcala Gonzalez

OTB·2025

▶

#35Bd7??

Tactics

vs Bernado Lopez

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

660 Games

53%17%30%

Move	Games	Performance	%
1.d4	262		61%
1.e4	249		58%
1.Nf3	133		70%
1.c4	15		70%
1.b3 Weak	1		0%

1.d4

61%

262

1.e4

58%

249

1.Nf3

70%

133

1.c4

70%

15

1.b3

0%

1

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