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

D

IM

Dyu, Viacheslav

RUS RUS·Born 1976·FIDE #4167465·160 Games

Classical2434147 Games

Rapid23260 Games

Blitz238813 Games

Play against Dyu, Viacheslav's Twin

PRO

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

160 games analyzed

Statistics

Total

160

Wins

53

Draws

50

Losses

57

33%31%36%

Deep Analysis

Stockfish 18 · Classical games · 0 analyzed

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

Insufficient data

Problematic Pieces — Which pieces cause most errors?

Insufficient data

Critical Moment — When does the first serious error occur?

Insufficient data

Error Heatmap — Where do most errors occur?

Insufficient data

Openings

Based on player games

Weaknesses

— exploit these lines

White44.4%Loses

Queen's Gambit Declined — 1.d4 d5 2.c4 e6

9 Games · Low sample · last played 2 years agoPlay this line

No significant weaknesses detected as Black

Strengths

— avoid these lines

No consistent strengths detected as White

No consistent strengths detected as Black

Critical Blunders

5 errors · Stockfish

#26g6??Tacticsvs DegtiarevBlitz · 2024

#21Qe6??Tacticsvs SadorraBlitz · 2024

#31Rxd4??Tacticsvs OndoziBlitz · 2024

#20Nxf6+??Tacticsvs RitvizBlitz · 2024

#19Rf1??Tacticsvs LyutsingerBlitz · 2024

Recent Games

160 Games

W

Degtiarev, Evgeny(2394)

57. International Chess F... · 21 Jul 2024

0-1

W

Emmenecker, Pierre-Antoine(2318)

57. International Chess F... · 21 Jul 2024

0-1

W

Santeramo, Alessia Carmen(2136)

57. International Chess F... · 21 Jul 2024

0-1

L

Sadorra, Julio Catalino(2542)

57. International Chess F... · 21 Jul 2024

1-0

D

Jain Kashish Manoj(2308)

57. International Chess F... · 21 Jul 2024

½-½

D

Saine, Zachary(2058)

57. International Chess F... · 21 Jul 2024

½-½

Endgame Statistics

PRO8 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

8 endgame categories analyzed — discover where they collapse under pressure

Repertoire

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Move arrowsmost-played moves

Starting Position

Stockfish

79 Games

32%33%35%

Move	Games	Performance	%
1.d4	43		43%
1.e4	36		54%

MoveGamesPerformance%

1.d4

43

43%

1.e4

36

54%

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