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

Lagno, Kateryna

RUS RUS·Born 1989·FIDE #14109336·3,676 Games

Classical25062,599 Games

Rapid2435419 Games

Blitz2414750 Games

Statistics

3676

Total

1521

Wins

1249

Draws

901

Losses

41%34%25%

Play Style

What you need to know before facing them

Elite accuracy: 91.7% average

Very consistent (84%)

Very precise: only 0.2 blunders/game

Dominates 1.b3 ♚ (85% in 10 games)

Deep Analysis

Stockfish 18 · Classical games · 740 analyzed

Accuracy by phase

Opening96.9%

Middlegame92.4%

Endgame94.5%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)93%

176 Games

Equal position95%

216 Games

Losing (-2 or more)88%

108 Games

Problematic Pieces

Which pieces cause most errors?

♖

25%

137 errors

♕

20%

113 errors

♙

19%

104 errors

♞

13%

70 errors

♗

12%

69 errors

♔

11%

63 errors

Critical Moment

When does the first serious error occur?

Move 38average

1-15

16-25

26-35

36-45

46+

38% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

14

14

24

14

19

18

15

15

17

16

abcdefgh

Many

Few

Critical squares

f624 err

d519 err

f418 err

e317 err

f316 err

f6/d5 concentrate most errors. Force decisions in those zones.

Recent Games

L

Artemiev, Vladislav2641

Titled Tue 19th May 2026 · 19 May 2026

0-1

W

Khamdamova, Afruza2423

Titled Tue 19th May 2026 · 19 May 2026

1-0

D

Aalto, Patrik2320

Titled Tue 19th May 2026 · 19 May 2026

½-½

L

Grischuk, Alexander2641

Titled Tue 19th May 2026 · 19 May 2026

0-1

W

Laddha, Shubh Jayesh2303

Titled Tue 19th May 2026 · 19 May 2026

0-1

W

Hnatyshyn, Anastasiia2207

Titled Tue 19th May 2026 · 19 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: Closed

50.0%

10 Games·Loses

1.e4 c5 2.Nc3 d6

Black

Sicilian: Taimanov

55.6%

18 Games·Loses

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

Strengths

AVOID

White

French: Steinitz

80.0%

10 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5

Italian: Giuoco Piano

59.1%

22 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Black

Scotch: Mieses

57.1%

14 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6

Ruy Lopez: Steinitz Deferred

51.4%

37 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#32Qc6??

Tactics

vs Tsolakidou

Blitz·2026

▶

#33Kxb2??

Tactics

vs Vantika Agrawal

Blitz·2026

▶

#39Rxb3??

Tactics

vs Dronavalli

Blitz·2026

▶

#29Bd4??

Tactics

vs Vaishali

Blitz·2026

▶

#35Qa7??

Tactics

vs Yip

Blitz·2026

▶

#18g4??

Tactics

vs Dronavalli

Blitz·2026

▶

#77Re2??

Endgame

vs Rakshitta Ravi

Blitz·2026

▶

#25Nxe4??

Tactics

vs Yip

Blitz·2026

▶

#36Ba1??

Tactics

vs Goryachkina

Blitz·2025

▶

#20Qb4??

Tactics

vs Padmini

Blitz·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

1877 Games

46%33%21%

Move	Games	Performance	%
1.e4	1659		63%
1.d4	89		60%
1.Nf3	73		58%
1.c4	55		61%
1.g3	1		50%

1.e4

63%

1659

1.d4

60%

89

1.Nf3

58%

73

1.c4

61%

55

1.g3

50%

1

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