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

Morovic Fernandez, Ivan

CHI CHI·Born 1963·FIDE #3405400·1,481 Games

Classical24951,462 Games

Rapid257819 Games

Blitz24980 Games

Statistics

1481

Total

497

Wins

717

Draws

267

Losses

34%48%18%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

Solid conversion: 84%

Very consistent (91%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (68% in 84 games)

Deep Analysis

Stockfish 18 · Classical games · 169 analyzed

Accuracy by phase

Opening97.0%

Middlegame94.4%

Endgame95.1%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)95%

47 Games

Equal position95%

77 Games

Losing (-2 or more)91%

45 Games

Problematic Pieces

Which pieces cause most errors?

♖

25%

47 errors

♞

20%

37 errors

♙

19%

36 errors

♗

16%

31 errors

♕

12%

23 errors

♔

7%

14 errors

Critical Moment

When does the first serious error occur?

Move 53average

1-15

16-25

26-35

36-45

46+

62% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

7

8

6

8

11

6

8

6

8

abcdefgh

Many

Few

Critical squares

e411 err

d48 err

e18 err

f38 err

f68 err

e4/d4 concentrate most errors. Force decisions in those zones.

Recent Games

L

Matinian, Nikita2396

Titled Tue 14th May Early · 14 May 2024

0-1

L

Moskvin, Anatoly2192

Titled Tue 14th May Early · 14 May 2024

0-1

W

Martinez Ramirez, Lennis2454

Titled Tue 14th May Early · 14 May 2024

1-0

W

Centron Antuna, Daniel2267

Titled Tue 14th May Early · 14 May 2024

0-1

L

Klukin, Kirill2413

Titled Tue 14th May Early · 14 May 2024

1-0

W

Vardanyan, Aras2314

Titled Tue 14th May Early · 14 May 2024

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Grünfeld

50.0%

8 GamesLow sample·Loses

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

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

French: Rubinstein

60.0%

10 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 dxe4

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#47Rc2??

Endgame

vs Lima

OTB·2022

▶

#38Rxh4+??

Tactics

vs Prie

OTB·2022

▶

#25Qb3??

Tactics

vs Parligras

OTB·2022

▶

#39Ba3??

Tactics

vs Yoo

OTB·2022

▶

#59h5??

Endgame

vs Arias

OTB·2022

▶

#27Nxf5??

Tactics

vs Esipenko

OTB·2021

▶

#34Kh8??

Tactics

vs Lujan

OTB·2021

▶

#47Rae1??

Endgame

vs Mamedov

OTB·2021

▶

#32Ng5??

Tactics

vs Meshkovs

OTB·2021

▶

#30Qc5??

Tactics

vs Jumabayev

OTB·2021

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2024

2023

2022

2021

2020

2019

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

747 Games

40%47%13%

Move	Games	Performance	%
1.e4	380		65%
1.d4	227		58%
1.Nf3	84		69%
1.c4	51		59%
1.b4 Strong	5		80%

1.e4

65%

380

1.d4

58%

227

1.Nf3

69%

84

1.c4

59%

51

1.b4

80%

5

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