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

Alvarado Diaz, Alejandro

ESP ESP·Born 1993·FIDE #2276119·714 Games

Classical2484696 Games

Rapid242318 Games

Blitz24770 Games

Statistics

714

Total

340

Wins

185

Draws

189

Losses

48%26%26%

Play Style

What you need to know before facing them

Elite accuracy: 92.3% average

Plays 2.2% better with white

Solid conversion: 83%

Very consistent (84%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (71% in 72 games)

Deep Analysis

Stockfish 18 · Classical games · 95 analyzed

Accuracy by phase

Opening95.5%

Middlegame93.1%

Endgame94.4%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)93%

41 Games

Equal position95%

32 Games

Losing (-2 or more)87%

22 Games

Problematic Pieces

Which pieces cause most errors?

♖

31%

32 errors

♙

16%

17 errors

♕

15%

16 errors

♔

14%

15 errors

♞

13%

14 errors

♗

10%

10 errors

Critical Moment

When does the first serious error occur?

Move 43average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

5

5

4

4

4

4

4

4

3

3

abcdefgh

Many

Few

Critical squares

e75 err

g75 err

a54 err

b44 err

d44 err

e7/g7 concentrate most errors. Force decisions in those zones.

Recent Games

L

Sovetbekova, Nurai2007

Titled Tue 1st Jul Early · 1 Jul 2025

0-1

W

Andrade, Ivan2136

Titled Tue 1st Jul Early · 1 Jul 2025

0-1

W

Lazaro Azcutia, Miguel2275

Titled Tue 1st Jul Early · 1 Jul 2025

0-1

W

Auribault, Louis2114

Titled Tue 1st Jul Early · 1 Jul 2025

1-0

L

Durarbayli, Vasif2612

Titled Tue 1st Jul Early · 1 Jul 2025

0-1

W

Turcsanyi, Vince Gergo2312

Titled Tue 1st Jul Early · 1 Jul 2025

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

Italian: Two Knights

63.6%

11 Games·Loses

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

Reti vs King's Indian

55.6%

9 GamesLow sample·Loses

1.Nf3 Nf6 2.c4 g6

Strengths

AVOID

White

King's Indian

60.0%

10 Games·Wins

1.d4 Nf6 2.c4 g6

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#48Bb2??

Endgame

vs Ayats Llobera

OTB·2024

▶

#49exd5??

Endgame

vs Espinosa Aranda

Rapid·2023

▶

#25Rh1+??

Tactics

vs Iglesias Ferreira

Rapid·2023

▶

#46Rb8??

Endgame

vs Perez Manas

Rapid·2023

▶

#50Kf3??

Endgame

vs Arenas Vanegas

OTB·2019

▶

#56Kd5??

Endgame

vs Valderrama Quiceno

OTB·2019

▶

#41Ke3??

Endgame

vs Sumets

OTB·2019

▶

#50Qd2??

Endgame

vs Alvarez Alonso

OTB·2019

▶

#37Rf5??

Tactics

vs Kollars

OTB·2019

▶

#35Rxb4??

Tactics

vs Donchenko

OTB·2019

Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2025

2024

2023

2022

2021

2019

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

370 Games

50%27%23%

Move	Games	Performance	%
1.d4	127		56%
1.Nf3 Strong	72		71%
1.e4	52		64%
1.g3	52		64%
1.c4	22		61%
1.Nc3	21		60%
1.b3 Strong	9		89%
1.a3 Strong	7		100%
1.c3	3		67%
1.e3 Weak	3		0%
1.b4 Strong	2		75%

1.d4

56%

127

1.Nf3

71%

72

1.e4

64%

52

1.g3

64%

52

1.c4

61%

22

1.Nc3

60%

21

1.b3

89%

9

1.a3

100%

7

1.c3

67%

3

1.e3

0%

3

1.b4

75%

2

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