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

Halkias, Stelios

GRE GRE·Born 1980·FIDE #4201809·3,273 Games

Classical25052,941 Games

Rapid2457166 Games

Blitz2465188 Games

Statistics

3273

Total

1548

Wins

983

Draws

741

Losses

47%30%23%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

Solid conversion: 84%

Very consistent (85%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (75% in 100 games)

Deep Analysis

Stockfish 18 · Classical games · 247 analyzed

Accuracy by phase

Opening96.3%

Middlegame93.4%

Endgame94.7%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)94%

101 Games

Equal position94%

109 Games

Losing (-2 or more)88%

37 Games

Problematic Pieces

Which pieces cause most errors?

♖

22%

42 errors

♙

21%

40 errors

♕

18%

35 errors

♗

15%

28 errors

♞

15%

28 errors

♔

10%

20 errors

Critical Moment

When does the first serious error occur?

Move 43average

1-15

16-25

26-35

36-45

46+

33% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

5

8

9

11

5

5

5

5

10

9

abcdefgh

Many

Few

Critical squares

e511 err

e410 err

c59 err

g49 err

e68 err

e5/e4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Padmini, Rout2347

Titled Tue 7th Apr 2026 · 7 Apr 2026

1-0

L

Ocampos, Ian2227

Titled Tue 7th Apr 2026 · 7 Apr 2026

1-0

W

Durarbayli, Vasif2611

Titled Tue 7th Apr 2026 · 7 Apr 2026

1-0

W

Smieszek, Wojciech2105

Titled Tue 7th Apr 2026 · 7 Apr 2026

1-0

L

Javakhadze, Zurab2423

Titled Tue 7th Apr 2026 · 7 Apr 2026

0-1

W

Chen, Yidong2103

Titled Tue 7th Apr 2026 · 7 Apr 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

Italian: Fried Liver

62.5%

8 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5

Caro-Kann: Exchange

53.8%

13 Games·Loses

1.e4 c6 2.d4 d5 3.exd5

Strengths

AVOID

White

King's Indian: Main Line

68.0%

50 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O

King's Indian: Classical

67.4%

43 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5

Black

Catalan

72.7%

11 Games·Wins

1.d4 Nf6 2.c4 e6 3.g3

London System

70.0%

10 Games·Wins

1.d4 Nf6 2.Bf4 d5

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#80Ke3??

Endgame

vs Altini

Blitz·2025

▶

#52Rbc1+??

Endgame

vs Suleymenov

Blitz·2025

▶

#43Re8??

Endgame

vs Wojtaszek

Blitz·2025

▶

#43e3??

Endgame

vs Praggnanandhaa R

Blitz·2025

▶

#71Kf4??

Endgame

vs Ansat

Rapid·2025

▶

#32Rxf2??

Tactics

vs Cunha

Blitz·2025

▶

#55Qf3??

Endgame

vs Sankalp Gupta

Blitz·2025

▶

#36Rf6??

Tactics

vs Sharan

Blitz·2025

▶

#25Red1??

Tactics

vs Abdusattorov

Blitz·2025

▶

#30Re7??

Tactics

vs Kravtsiv

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

1647 Games

53%29%18%

Move	Games	Performance	%
1.d4	737		69%
1.Nf3	735		66%
1.c4 Strong	100		75%
1.e4	74		57%
1.b3	1		50%

1.d4

69%

737

1.Nf3

66%

735

1.c4

75%

100

1.e4

57%

74

1.b3

50%

1

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