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

Sanal, Vahap

TUR TUR·Born 1998·FIDE #6300545·4,013 Games

Classical25553,550 Games

Rapid2530186 Games

Blitz2547299 Games

Statistics

4013

Total

2157

Wins

747

Draws

1104

Losses

54%19%28%

Play Style

What you need to know before facing them

Elite accuracy: 94.6% average

Solid conversion: 86%

Very consistent (93%)

Very precise: only 0.0 blunders/game

Dominates 1.b3 ♔ (82% in 11 games)

Deep Analysis

Stockfish 18 · Classical games · 144 analyzed

Accuracy by phase

Opening96.8%

Middlegame94.3%

Endgame96.0%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)95%

59 Games

Equal position96%

56 Games

Losing (-2 or more)91%

29 Games

Problematic Pieces

Which pieces cause most errors?

♕

24%

20 errors

♖

20%

17 errors

♔

15%

13 errors

♗

14%

12 errors

♙

14%

12 errors

♞

12%

10 errors

Critical Moment

When does the first serious error occur?

Move 29average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 16-25. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

4

3

4

3

3

3

3

3

3

3

abcdefgh

Many

Few

Critical squares

b64 err

e54 err

a43 err

b53 err

d13 err

b6/e5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Maltsevskaya, Aleksandra2390

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Weilguni, Johann2072

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Denk, Adolf2133

TCh-AUT Rapid 2026 · 17 May 2026

0-1

D

Martinez Alcantara, Jose Eduardo2650

TCh-AUT Rapid 2026 · 17 May 2026

½-½

L

Maghsoodloo, Parham2710

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Glek, Igor2423

TCh-AUT Rapid 2026 · 17 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Caro-Kann: Advance

53.3%

15 Games·Loses

1.e4 c6 2.d4 d5 3.e5

Ruy Lopez: Open

44.4%

9 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4

Black

Reti: Double Fianchetto

61.5%

13 Games·Loses

1.Nf3 Nf6 2.g3 g6

Nimzo-Indian: Classical

52.2%

23 Games·Loses

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2

Strengths

AVOID

White

Sicilian: d6 Systems

57.3%

213 Games·Wins

1.e4 c5 2.Nf3 d6

Reti: Reversed London

76.5%

17 Games·Wins

1.Nf3 d5 2.g3 c6

Black

English: Anglo-Indian

75.0%

12 Games·Wins

1.c4 Nf6 2.Nc3 g6

Sicilian: d6 Systems

63.6%

22 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#31Rd2??

Tactics

vs Robson

Blitz·2025

▶

#24Rgh4??

Tactics

vs Gan-Erdene

Blitz·2025

▶

#36Rxe7??

Tactics

vs Nurgaliyev

Blitz·2025

▶

#31Nd6??

Tactics

vs Harshavardhan G B

Blitz·2025

▶

#35Nd1??

Tactics

vs Firouzja

Blitz·2025

▶

#43Qe6+??

Endgame

vs Duda

Blitz·2025

▶

#49Nd6??

Endgame

vs Galaviz Medina

Blitz·2025

▶

#44Rc3??

Endgame

vs Alsaqer

Blitz·2025

▶

#47Rc7??

Endgame

vs Motylev

Blitz·2025

▶

#46Bb5??

Endgame

vs Erten

OTB·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

2023 Games

57%18%25%

Move	Games	Performance	%
1.e4	1468		67%
1.Nf3	337		64%
1.d4	145		61%
1.c4 Strong	49		72%
1.b3 Strong	11		82%
1.g3	6		50%
1.a3 Weak	2		25%
1.e3	2		50%
1.d3 Weak	1		0%
1.f4 Strong	1		100%
1.Nc3 Strong	1		100%

1.e4

67%

1468

1.Nf3

64%

337

1.d4

61%

145

1.c4

72%

49

1.b3

82%

11

1.g3

50%

6

1.a3

25%

2

1.e3

50%

2

1.d3

0%

1

1.f4

100%

1

1.Nc3

100%

1

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