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

Aaryan Varshney

IND IND·Born 2005·FIDE #45048975·476 Games

Classical2538453 Games

Rapid22942 Games

Blitz227421 Games

Statistics

476

Total

175

Wins

179

Draws

122

Losses

37%38%26%

Play Style

What you need to know before facing them

Elite accuracy: 94.3% average

Solid conversion: 89%

Very consistent (92%)

Very precise: only 0.0 blunders/game

Dominates 1.d4 ♔ (62% in 226 games)

Vulnerable to 1.Nf3 ♚ (only 40%)

Deep Analysis

Stockfish 18 · Classical games · 271 analyzed

Accuracy by phase

Opening97.0%

Middlegame94.2%

Endgame95.9%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)96%

92 Games

Equal position95%

116 Games

Losing (-2 or more)91%

63 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

40 errors

♙

22%

37 errors

♕

18%

30 errors

♞

15%

25 errors

♗

13%

23 errors

♔

9%

16 errors

Critical Moment

When does the first serious error occur?

Move 51average

1-15

16-25

26-35

36-45

46+

57% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

6

6

6

5

7

9

5

6

5

5

abcdefgh

Many

Few

Critical squares

e59 err

c57 err

a66 err

c76 err

d46 err

e5/c5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Utsab Chatterjee2312

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

0-1

W

Chakrabarti, Tamal1719

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

0-1

W

Venkatesh Das1986

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

0-1

W

Niladri Banerjee2068

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

1-0

W

Rounaq Biswas1770

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

1-0

W

Abhiraj Das1853

7th DD-DBCA Open Fide Rat... · 19 Mar 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

No consistent strengths detected as White

Black

Italian: Giuoco Piano

81.8%

11 Games·Wins

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

Ruy Lopez: Morphy

53.3%

15 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#58Rg8+??

Endgame

vs Samant Aditya S

Blitz·2022

▶

#38Qxe3??

Tactics

vs Sengupta

Blitz·2022

▶

#41d6??

Endgame

vs Ajay Karthikeyan

Blitz·2022

▶

#35Rb8??

Tactics

vs Narayanan S L

Blitz·2022

▶

#48Qd4??

Endgame

vs Ajay Karthikeyan

OTB·2022

▶

#32Kg2??

Tactics

vs Tran

OTB·2022

▶

#63Bg2+??

Endgame

vs Neelotpal

OTB·2022

▶

#55Nf8??

Endgame

vs Ponkratov

OTB·2022

▶

#44Ne4??

Endgame

vs Pranesh M

OTB·2021

▶

#60Re6??

Endgame

vs Pranesh M

OTB·2021

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

237 Games

40%42%18%

Move	Games	Performance	%
1.d4	226		62%
1.Nf3	10		55%
1.e4	1		50%

1.d4

62%

226

1.Nf3

55%

10

1.e4

50%

1

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