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

Vidit, Santosh Gujrathi

#5 World

IND IND·Born 1994·FIDE #5029465·3,158 Games

Classical27082,363 Games

Rapid2638412 Games

Blitz2688430 Games

Statistics

3158

Total

1363

Wins

1154

Draws

638

Losses

43%37%20%

Play Style

What you need to know before facing them

Elite accuracy: 94.3% average

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (73% in 209 games)

Deep Analysis

Stockfish 18 · Classical games · 145 analyzed

Accuracy by phase

Opening96.9%

Middlegame94.1%

Endgame95.4%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)95%

36 Games

Equal position96%

77 Games

Losing (-2 or more)90%

32 Games

Problematic Pieces

Which pieces cause most errors?

♖

31%

33 errors

♕

21%

22 errors

♙

14%

15 errors

♔

13%

14 errors

♗

10%

10 errors

♞

10%

11 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

56% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

3

3

3

4

3

7

4

3

3

3

abcdefgh

Many

Few

Critical squares

b47 err

c44 err

e54 err

a43 err

b73 err

b4/c4 concentrate most errors. Force decisions in those zones.

Recent Games

D

Hakobyan, Aram2627

2026 Chesscom Open Play I... · 25 Mar 2026

½-½

W

Makhnev, Denis2558

2026 Chesscom Open Play I... · 25 Mar 2026

1-0

W

Muradli, Mahammad2592

2026 Chesscom Open Play I... · 25 Mar 2026

0-1

L

Murzin, Volodar2650

2026 Chesscom Open Play I... · 25 Mar 2026

1-0

W

Kravtsiv, Martyn2598

2026 Chesscom Open Play I... · 25 Mar 2026

1-0

D

Sadhwani, Raunak2641

2026 Chesscom Open Play I... · 25 Mar 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Nimzo-Indian: Capablanca

43.8%

16 Games·Loses

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Reti: Double Fianchetto

71.4%

14 Games·Wins

1.Nf3 Nf6 2.g3 g6

Sicilian: e6 Systems

64.5%

31 Games·Wins

1.e4 c5 2.Nf3 e6

Black

Sicilian: d6 Systems

58.3%

127 Games·Wins

1.e4 c5 2.Nf3 d6

English: g3 System

63.6%

11 Games·Wins

1.c4 e5 2.g3 Nf6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#59c6??

Endgame

vs Mamedyarov

OTB·2025

▶

#53Qh5??

Endgame

vs Sindarov

OTB·2025

▶

#25d7??

Tactics

vs Rapport

OTB·2025

▶

#55Kd3??

Endgame

vs Shankland

OTB·2025

▶

#59Qa6+??

Endgame

vs Rosner

OTB·2025

▶

#49Rb8??

Endgame

vs Ivanchuk

OTB·2025

▶

#97Ke5??

Endgame

vs Sargsyan

OTB·2025

▶

#34Bg5??

Tactics

vs Van Foreest

OTB·2025

▶

#56Rg8+??

Endgame

vs Karthikeyan

OTB·2025

▶

#47Qc4??

Endgame

vs Robson

OTB·2025

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

1582 Games

48%35%17%

Move	Games	Performance	%
1.d4	951		64%
1.e4	339		63%
1.Nf3 Strong	210		73%
1.c4	74		69%
1.b3 Strong	8		88%

1.d4

64%

951

1.e4

63%

339

1.Nf3

73%

210

1.c4

69%

74

1.b3

88%

8

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