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

Oparin, Grigoriy

USA USA·Born 1997·FIDE #24125890·5,206 Games

Classical26434,291 Games

Rapid2606439 Games

Blitz2670547 Games

Statistics

5206

Total

2559

Wins

1510

Draws

1133

Losses

49%29%22%

Play Style

What you need to know before facing them

Elite accuracy: 93.7% average

Solid conversion: 84%

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.Nc3 ♔ (79% in 94 games)

Deep Analysis

Stockfish 18 · Classical games · 709 analyzed

Accuracy by phase

Opening96.7%

Middlegame93.7%

Endgame95.1%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

192 Games

Equal position96%

219 Games

Losing (-2 or more)90%

89 Games

Problematic Pieces

Which pieces cause most errors?

♙

21%

77 errors

♖

21%

80 errors

♕

19%

70 errors

♗

14%

52 errors

♔

13%

49 errors

♞

12%

45 errors

Critical Moment

When does the first serious error occur?

Move 44average

1-15

16-25

26-35

36-45

46+

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

Error Heatmap

Where do most errors occur?

9

9

9

17

9

9

15

10

16

18

abcdefgh

Many

Few

Critical squares

f318 err

e517 err

d316 err

e415 err

f410 err

f3/e5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Tabatabaei, M. Amin2714

Titled Tue 12th May 2026 · 12 May 2026

1-0

W

Tregubov, Pavel V.2543

Titled Tue 12th May 2026 · 12 May 2026

1-0

W

Aimdilokwong,Alec D2047

Titled Tue 12th May 2026 · 12 May 2026

1-0

W

Gurevich, Neria2219

Titled Tue 12th May 2026 · 12 May 2026

0-1

W

Nguyen Quang Anh2084

Titled Tue 12th May 2026 · 12 May 2026

1-0

W

Sindarov, Javokhir2776

Titled Tue 12th May 2026 · 12 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Nimzo-Indian: Capablanca

50.0%

8 GamesLow sample·Loses

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

Reti: KIA

40.6%

64 Games·Loses

1.Nf3 d5 2.g3 g6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

1.Nc3 d5 2.d4 Nf6

80.0%

15 Games·Wins

1.Nc3 d5 2.d4 Nf6

London System

80.0%

15 Games·Wins

1.Nc3 d5 2.d4 Nf6 3.Bf4

Black

Sicilian: e6 Systems

57.0%

86 Games·Wins

1.e4 c5 2.Nf3 e6

Caro-Kann: Main Line

60.9%

23 Games·Wins

1.e4 c6 2.d4 d5 3.Nc3 dxe4

Critical Blunders

Tactical errors analyzed with Stockfish

Loading blunders...

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

2622 Games

54%27%19%

Move	Games	Performance	%
1.e4	901		65%
1.Nf3	627		65%
1.d4	569		65%
1.c4 Strong	242		77%
1.g3 Strong	114		74%
1.Nc3 Strong	94		79%
1.b3 Strong	43		76%
1.a3 Strong	11		73%
1.f4 Strong	10		75%
1.e3 Strong	4		100%
1.d3 Weak	2		25%
1.c3	2		50%
1.f3 Strong	1		100%
1.b4 Strong	1		100%
1.a4 Strong	1		100%

1.e4

65%

901

1.Nf3

65%

627

1.d4

65%

569

1.c4

77%

242

1.g3

74%

114

1.Nc3

79%

94

1.b3

76%

43

1.a3

73%

11

1.f4

75%

10

1.e3

100%

4

1.d3

25%

2

1.c3

50%

2

1.f3

100%

1

1.b4

100%

1

1.a4

100%

1

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