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

Szpar, Milosz

POL POL·Born 2002·FIDE #1184989·3,592 Games

Classical24993,416 Games

Rapid242662 Games

Blitz2433114 Games

Statistics

3592

Total

2009

Wins

532

Draws

1048

Losses

56%15%29%

Play Style

What you need to know before facing them

Elite accuracy: 93.5% average

Solid conversion: 83%

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (73% in 35 games)

Deep Analysis

Stockfish 18 · Classical games · 466 analyzed

Accuracy by phase

Opening96.7%

Middlegame93.1%

Endgame94.7%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

197 Games

Equal position95%

181 Games

Losing (-2 or more)90%

88 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

85 errors

♙

19%

72 errors

♕

17%

63 errors

♗

15%

56 errors

♞

14%

51 errors

♔

13%

49 errors

Critical Moment

When does the first serious error occur?

Move 38average

1-15

16-25

26-35

36-45

46+

28% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

11

9

16

12

10

13

14

10

9

11

abcdefgh

Many

Few

Critical squares

f616 err

f414 err

d413 err

c512 err

b611 err

f6/f4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Ketzetzis, Georgios2273

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

D

Isaev, Anton2173

1st 3-0 Thu 28th May 2026 · 28 May 2026

½-½

W

Samdanov, Samdan2294

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Stickler, Florentin2364

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Theodorou, Nikolas2635

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Holinka, Henning2355

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

French: Advance

57.1%

14 Games·Loses

1.e4 e6 2.d4 d5 3.e5

Black

Sicilian: Alapin

55.6%

9 GamesLow sample·Loses

1.e4 c5 2.c3 d5

Strengths

AVOID

White

Sicilian: e6 Systems

61.2%

98 Games·Wins

1.e4 c5 2.Nf3 e6

Caro-Kann: Panov-Botvinnik

69.2%

13 Games·Wins

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

Black

London System

76.9%

13 Games·Wins

1.d4 Nf6 2.Bf4 c5

Sicilian: e6 Systems

65.4%

26 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#28Bxd6??

Tactics

vs Galchenko

OTB·2026

▶

#52Bc8??

Endgame

vs Ezat

OTB·2026

▶

#59Kb6??

Endgame

vs Sarana

OTB·2026

▶

#38Ng6??

Tactics

vs Svane

OTB·2026

▶

#40Rf1??

Tactics

vs Gusain

OTB·2025

▶

#70h3??

Endgame

vs Filip

OTB·2025

▶

#69Bf4??

Endgame

vs Stefan

OTB·2025

▶

#69h3??

Endgame

vs Hulka

OTB·2025

▶

#40Nf7+??

Tactics

vs Radzimski

OTB·2025

▶

#43Kg7??

Endgame

vs Filgueiras

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

1812 Games

59%14%27%

Move	Games	Performance	%
1.e4	1519		66%
1.Nf3	164		67%
1.d4	93		69%
1.c4 Strong	35		73%
1.b3 Strong	1		100%

1.e4

66%

1519

1.Nf3

67%

164

1.d4

69%

93

1.c4

73%

35

1.b3

100%

1

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