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

Seemann, Jakub

POL POL·Born 2008·FIDE #21874697·1,828 Games

Classical25481,668 Games

Rapid241573 Games

Blitz238087 Games

Statistics

1828

Total

867

Wins

318

Draws

640

Losses

47%17%35%

Play Style

What you need to know before facing them

Elite accuracy: 92.2% average

Solid conversion: 87%

Very consistent (88%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♔ (79% in 34 games)

Vulnerable to 1.d4 ♚ (only 46%)

Deep Analysis

Stockfish 18 · Classical games · 567 analyzed

Accuracy by phase

Opening96.6%

Middlegame92.6%

Endgame94.5%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)94%

206 Games

Equal position94%

137 Games

Losing (-2 or more)88%

157 Games

Problematic Pieces

Which pieces cause most errors?

♖

22%

133 errors

♙

18%

113 errors

♕

17%

106 errors

♞

16%

95 errors

♗

15%

92 errors

♔

12%

72 errors

Critical Moment

When does the first serious error occur?

Move 37average

1-15

16-25

26-35

36-45

46+

37% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

17

18

17

19

18

16

16

19

19

16

abcdefgh

Many

Few

Critical squares

c319 err

c519 err

g419 err

d518 err

e618 err

c3/c5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Roshka, Yevgeniy2512

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Korobov, Anton2612

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Glek, Igor2423

TCh-AUT Rapid 2026 · 17 May 2026

1-0

W

Maghsoodloo, Parham2710

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Iturrizaga Bonelli, Eduardo2589

TCh-AUT Rapid 2026 · 17 May 2026

1-0

D

Pranav,V2657

TCh-AUT Rapid 2026 · 17 May 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Italian: Giuoco Piano

54.5%

11 Games·Loses

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

Ruy Lopez: Morphy

45.0%

40 Games·Loses

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

Black

English: Anglo-Indian

69.2%

13 Games·Loses

1.c4 Nf6 2.Nc3 g6

London System

62.5%

8 GamesLow sample·Loses

1.d4 Nf6 2.Bf4 e6

Strengths

AVOID

White

Queen's Gambit Accepted

62.5%

16 Games·Wins

1.d4 d5 2.c4 dxc4

Sicilian: d6 Systems

56.7%

67 Games·Wins

1.e4 c5 2.Nf3 d6

Black

Sicilian: e6 Systems

72.7%

22 Games·Wins

1.e4 c5 2.Nf3 e6

French: Rubinstein

58.3%

12 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 dxe4

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#28Nef5??

Tactics

vs Milikow

OTB·2025

▶

#20Nb1??

Tactics

vs Jaiveer Mahendru

OTB·2025

▶

#34Kh2??

Tactics

vs Sharon

Blitz·2025

▶

#21Na2??

Tactics

vs Yeshwant Saravanan

Blitz·2025

▶

#35exf4??

Tactics

vs Shashish Subbiah

Blitz·2025

▶

#33Qd3+??

Tactics

vs Kuru

Blitz·2025

▶

#22Qe4??

Tactics

vs Vivaan Vishal Shah

Blitz·2025

▶

#72Ke4??

Endgame

vs Klimkowski

Rapid·2025

▶

#29f6??

Tactics

vs Madej

Rapid·2025

▶

#48Qc6+??

Endgame

vs Fedorchuk

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

923 Games

52%16%32%

Move	Games	Performance	%
1.e4	351		56%
1.d4	282		57%
1.Nf3	124		69%
1.c4	111		61%
1.b3 Strong	34		79%
1.g3 Strong	13		77%
1.f4 Strong	2		100%
1.c3 Strong	2		100%
1.Nc3 Strong	1		100%
1.e3 Weak	1		0%
1.d3 Strong	1		100%
1.h4 Strong	1		100%

1.e4

56%

351

1.d4

57%

282

1.Nf3

69%

124

1.c4

61%

111

1.b3

79%

34

1.g3

77%

13

1.f4

100%

2

1.c3

100%

2

1.Nc3

100%

1

1.e3

0%

1

1.d3

100%

1

1.h4

100%

1

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