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

Demchenko, Anton

SLO SLO·Born 1987·FIDE #4160258·4,908 Games

Classical26114,213 Games

Rapid2514371 Games

Blitz2492324 Games

Statistics

4908

Total

2755

Wins

934

Draws

1218

Losses

56%19%25%

Play Style

What you need to know before facing them

Elite accuracy: 94.7% average

High resilience (63%): Dangerous even when losing

Solid conversion: 87%

Very consistent (93%)

Very precise: only 0.0 blunders/game

Dominates 1.a3 ♔ (80% in 28 games)

Deep Analysis

Stockfish 18 · Classical games · 119 analyzed

Accuracy by phase

Opening96.7%

Middlegame95.1%

Endgame96.3%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)95%

54 Games

Equal position95%

51 Games

Losing (-2 or more)91%

14 Games

Problematic Pieces

Which pieces cause most errors?

♖

35%

23 errors

♞

18%

12 errors

♙

15%

10 errors

♕

14%

9 errors

♗

11%

7 errors

♔

8%

5 errors

Critical Moment

When does the first serious error occur?

Move 71average

1-15

16-25

26-35

36-45

46+

67% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

2

4

3

3

3

3

3

2

3

3

abcdefgh

Many

Few

Critical squares

e74 err

c63 err

d43 err

d53 err

e43 err

e7/c6 concentrate most errors. Force decisions in those zones.

Recent Games

W

Federer, Colin2372

Titled Tue 26th May 2026 · 26 May 2026

0-1

D

Maslov,Mikhail

Titled Tue 26th May 2026 · 26 May 2026

½-½

L

Nakamura, Hikaru2792

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Vingris,Mikelis2317

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Belov, Aleksei R.2286

Titled Tue 26th May 2026 · 26 May 2026

0-1

D

Caruana, Fabiano2788

Titled Tue 26th May 2026 · 26 May 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Caro-Kann: Exchange

55.6%

9 GamesLow sample·Loses

1.e4 c6 2.d4 d5 3.exd5

Caro-Kann: Steinitz

44.4%

9 GamesLow sample·Loses

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Sicilian: d6 Systems

57.3%

354 Games·Wins

1.e4 c5 2.Nf3 d6

Sicilian: e6 Systems

61.3%

194 Games·Wins

1.e4 c5 2.Nf3 e6

Black

Nimzo-Indian

75.0%

12 Games·Wins

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4

Italian: Two Knights

59.4%

160 Games·Wins

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

Critical Blunders

Tactical errors analyzed with Stockfish

9 errors

▶

#30Re5??

Tactics

vs Kucuksari

OTB·2025

▶

#27Bh6+??

Tactics

vs Roshka

OTB·2025

▶

#61Rc4??

Endgame

vs Erigaisi Arjun

OTB·2025

▶

#20h4??

Tactics

vs Ayush Sharma

OTB·2025

▶

#133Ra7??

Endgame

vs Nielsen

OTB·2024

▶

#45Ke4??

Endgame

vs Di Nicolantonio

OTB·2024

▶

#29Qc7??

Tactics

vs Favarel

OTB·2024

▶

#57Kg4??

Endgame

vs Aradhya

OTB·2024

▶

#43Qc8??

Endgame

vs Buckels

OTB·2024

Endgame Statistics

22 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

2472 Games

58%19%23%

Move	Games	Performance	%
1.e4	2187		68%
1.d4	210		64%
1.Nf3	32		52%
1.a3 Strong	28		80%
1.g3	6		58%
1.c4 Strong	5		80%
1.f4 Weak	1		0%
1.h3 Strong	1		100%
1.c3 Strong	1		100%
1.b3 Strong	1		100%

1.e4

68%

2187

1.d4

64%

210

1.Nf3

52%

32

1.a3

80%

28

1.g3

58%

6

1.c4

80%

5

1.f4

0%

1

1.h3

100%

1

1.c3

100%

1

1.b3

100%

1

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