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

Khanin, Semen

FID FID·Born 1999·FIDE #4111990·2,172 Games

Classical25971,687 Games

Rapid2501198 Games

Blitz2456313 Games

Statistics

2172

Total

1029

Wins

527

Draws

616

Losses

47%24%28%

Play Style

What you need to know before facing them

Elite accuracy: 93.5% average

Solid conversion: 83%

Very consistent (85%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (75% in 53 games)

Vulnerable to 1.b3 ♚ (only 40%)

Deep Analysis

Stockfish 18 · Classical games · 410 analyzed

Accuracy by phase

Opening96.8%

Middlegame93.3%

Endgame95.1%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

189 Games

Equal position95%

145 Games

Losing (-2 or more)89%

76 Games

Problematic Pieces

Which pieces cause most errors?

♙

26%

88 errors

♖

21%

71 errors

♗

15%

53 errors

♞

13%

44 errors

♕

13%

46 errors

♔

12%

41 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

38% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

10

9

9

12

12

9

10

10

15

12

abcdefgh

Many

Few

Critical squares

e415 err

c512 err

d512 err

g412 err

d410 err

e4/c5 concentrate most errors. Force decisions in those zones.

Recent Games

L

Dau Khuong Duy2489

3rd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

1-0

W

Martinez Alcantara, Jose Eduardo2644

3rd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

0-1

W

Lai, Duc Minh2173

3rd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

0-1

L

Kishiev, Famil2338

2nd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

0-1

W

Rengifo Blancas, Renzo Jhonathan2117

3rd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

0-1

D

Nguyen, Ngoc Truong Son2600

3rd 3-0 Thu 27th Nov 2025 · 27 Nov 2025

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Ruy Lopez: Steinitz Deferred

55.6%

9 GamesLow sample·Loses

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

Sicilian: Kan

42.4%

33 Games·Loses

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

Black

English: g3 System

60.0%

10 Games·Loses

1.c4 e5 2.g3 c6

King's Indian: Main Line

57.1%

14 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O

Strengths

AVOID

White

Ruy Lopez: Marshall

72.7%

11 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5

Sicilian: Classical

64.7%

17 Games·Wins

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6

Black

Sicilian: e6 Systems

56.0%

125 Games·Wins

1.e4 c5 2.Nf3 e6

Sicilian: d6 Systems

66.7%

18 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#25Qc4??

Tactics

vs Owen

OTB·2025

▶

#43Qe3+??

Endgame

vs Alexakis

OTB·2025

▶

#54Bb3??

Endgame

vs Kvaloy

Blitz·2024

▶

#20Nc4??

Tactics

vs Barbosa

Blitz·2024

▶

#35Qe3??

Tactics

vs Sardana

Blitz·2024

▶

#28h5??

Tactics

vs Sadhwani

Blitz·2024

▶

#33Qxc5??

Tactics

vs Bok

Blitz·2024

▶

#43d6??

Endgame

vs Hardaway

OTB·2024

▶

#35Kg2??

Tactics

vs Vishruth Ajay Krishnan

OTB·2024

▶

#52Rd4??

Endgame

vs Zhou

OTB·2024

Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2025

2024

2023

2022

2021

2020

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

1102 Games

52%24%24%

Move	Games	Performance	%
1.e4	905		62%
1.d4	128		68%
1.c4 Strong	53		76%
1.Nf3	15		67%
1.b3 Weak	1		0%

1.e4

62%

905

1.d4

68%

128

1.c4

76%

53

1.Nf3

67%

15

1.b3

0%

1

🍪 Cookies · Chess Stalker uses technical cookies (required for operation) and analytical cookies (to improve the service). Analytical cookies are optional.