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

Ionov, Sergey

RUS RUS·Born 1962·FIDE #4100875·1,118 Games

Classical25021,072 Games

Rapid235731 Games

Blitz235415 Games

Statistics

1118

Total

366

Wins

568

Draws

184

Losses

33%51%16%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (66% in 99 games)

Deep Analysis

Stockfish 18 · Classical games · 20 analyzed

Accuracy by phase

Opening97.0%

Middlegame92.6%

Endgame96.1%

Clutch Factor

Performance under pressure

+10%

Winning (+2 or more)97%

3 Games

Equal position95%

13 Games

Losing (-2 or more)87%

4 Games

Problematic Pieces

Which pieces cause most errors?

♞

35%

6 errors

♗

29%

5 errors

♕

12%

2 errors

♖

12%

2 errors

♔

6%

1 errors

♙

6%

1 errors

Critical Moment

When does the first serious error occur?

Move 70average

1-15

16-25

26-35

36-45

46+

100% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

1

1

1

2

1

2

1

1

1

1

abcdefgh

Many

Few

Critical squares

b32 err

d42 err

b11 err

e21 err

f61 err

b3/d4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Smagin, Sergey2551

Sveshnikov Mem Blitz · 9 Dec 2023

1-0

D

Sirotkina, Nina2149

Sveshnikov Mem Blitz · 9 Dec 2023

½-½

D

Dragomarezkij, Evgeni2234

Sveshnikov Mem Blitz · 9 Dec 2023

½-½

L

Kalegin, Evgenij2356

Sveshnikov Mem Blitz · 9 Dec 2023

1-0

L

Balashov, Yuri S2382

Sveshnikov Mem Blitz · 9 Dec 2023

1-0

D

Mikhailova, Irina2169

Sveshnikov Mem Blitz · 9 Dec 2023

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

French: Tarrasch

55.6%

9 GamesLow sample·Loses

1.e4 e6 2.d4 d5 3.Nd2

Strengths

AVOID

White

No consistent strengths detected as White

Black

Sicilian: Kan

71.4%

14 Games·Wins

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

Critical Blunders

Tactical errors analyzed with Stockfish

7 errors

▶

#31Bd2??

Tactics

vs Bogumil

Blitz·2023

▶

#49Rf2??

Endgame

vs Smagin

Blitz·2023

▶

#38Kh8??

Tactics

vs Balashov

Blitz·2023

▶

#70Kh7??

Endgame

vs Lokander

OTB·2020

▶

#34Kg6??

Tactics

vs Mickevicius

Rapid·2019

▶

#18Rac1??

Tactics

vs Chernyak

Rapid·2019

▶

#24Bg2??

Tactics

vs Rozum

OTB·2019

Endgame Statistics

12 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2023

2020

2019

2017

2016

2015

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

565 Games

36%51%13%

Move	Games	Performance	%
1.d4	377		60%
1.Nf3	99		66%
1.c4	59		59%
1.e4	28		61%
1.b3 Strong	2		100%

1.d4

60%

377

1.Nf3

66%

99

1.c4

59%

59

1.e4

61%

28

1.b3

100%

2

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