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

Maslak, Konstantin

RUS RUS·Born 1984·FIDE #4130901·697 Games

Classical2555619 Games

Rapid247837 Games

Blitz252041 Games

Statistics

697

Total

297

Wins

234

Draws

166

Losses

43%34%24%

Play Style

What you need to know before facing them

Elite accuracy: 95.2% average

Very consistent (90%)

Very precise: only 0.0 blunders/game

Dominates 1.c4 ♔ (71% in 21 games)

Deep Analysis

Stockfish 18 · Classical games · 3 analyzed

Accuracy by phase

Opening93.8%

Middlegame94.9%

Endgame100.0%

Clutch Factor

Performance under pressure

+8%

Winning (+2 or more)93%

2 Games

Equal position98%

1 Games

Losing (-2 or more)85%

0 Games

Problematic Pieces

Which pieces cause most errors?

♞

33%

1 errors

♙

33%

1 errors

♖

33%

1 errors

♗

0%

0 errors

♔

0%

0 errors

♕

0%

0 errors

Critical Moment

When does the first serious error occur?

Move 30average

1-15

16-25

26-35

36-45

46+

Error Heatmap

Where do most errors occur?

1

1

1

abcdefgh

Many

Few

Critical squares

d41 err

e81 err

f41 err

d4/e8 concentrate most errors. Force decisions in those zones.

Recent Games

L

Oparin, Grigoriy2613

World Blitz 2018 · 30 Dec 2018

1-0

L

Mchedlishvili, Mikheil2610

World Blitz 2018 · 30 Dec 2018

1-0

W

Bilguun, Sumiya2497

World Blitz 2018 · 30 Dec 2018

1-0

W

Zvjaginsev, Vadim2642

World Blitz 2018 · 30 Dec 2018

1-0

L

Nikolov, Nikolay Petrov2593

World Blitz 2018 · 30 Dec 2018

0-1

W

Dzhumagaliev, Yan2410

World Blitz 2018 · 30 Dec 2018

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

French: Classical

70.0%

10 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Sicilian: e6 Systems

61.9%

21 Games·Wins

1.e4 c5 2.Nf3 e6

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

No blunders recorded

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2018

2017

2013

2012

2011

2010

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

348 Games

51%28%21%

Move	Games	Performance	%
1.e4	273		65%
1.d4	51		65%
1.c4 Strong	21		71%
1.Nf3 Strong	3		83%

1.e4

65%

273

1.d4

65%

51

1.c4

71%

21

1.Nf3

83%

3

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