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

Bologan, Victor

MDA MDA·Born 1971·FIDE #13900048·4,066 Games

Classical25903,287 Games

Rapid2477316 Games

Blitz2463488 Games

Statistics

4066

Total

1830

Wins

1082

Draws

1153

Losses

45%27%28%

Play Style

What you need to know before facing them

Elite accuracy: 91.2% average

Very consistent (81%)

Very precise: only 0.2 blunders/game

Dominates 1.e4 ♔ (64% in 1887 games)

Vulnerable to 1.b3 ♚ (only 40%)

Deep Analysis

Stockfish 18 · Classical games · 226 analyzed

Accuracy by phase

Opening96.3%

Middlegame92.4%

Endgame93.9%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)94%

82 Games

Equal position92%

62 Games

Losing (-2 or more)88%

82 Games

Problematic Pieces

Which pieces cause most errors?

♖

21%

60 errors

♗

19%

55 errors

♞

18%

51 errors

♙

18%

53 errors

♔

12%

36 errors

♕

12%

34 errors

Critical Moment

When does the first serious error occur?

Move 35average

1-15

16-25

26-35

36-45

46+

31% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

7

7

7

15

7

10

12

8

10

8

abcdefgh

Many

Few

Critical squares

e515 err

f412 err

e410 err

f310 err

d18 err

e5/f4 concentrate most errors. Force decisions in those zones.

Recent Games

W

Plat, Vojtech2483

Grand Prix PlusCity Blitz · 15 May 2026

1-0

L

Pichot, Alan2581

Grand Prix PlusCity Blitz · 15 May 2026

0-1

D

Sanal, Vahap2549

Grand Prix PlusCity Blitz · 15 May 2026

½-½

L

Iturrizaga Bonelli, Eduardo2589

Grand Prix PlusCity Blitz · 15 May 2026

1-0

L

Tabatabaei, M. Amin2714

Grand Prix PlusCity Blitz · 15 May 2026

1-0

D

Fridman, Daniel2560

Luc Winants Mem 2026 · 9 May 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

English: g3 System

66.7%

15 Games·Loses

1.c4 e5 2.g3 Nf6

Slav: Semi-Slav

54.5%

11 Games·Loses

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Strengths

AVOID

White

Ruy Lopez: Closed

55.9%

93 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7

French: Rubinstein

60.0%

20 Games·Wins

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

Black

Sicilian: e6 Systems

53.6%

112 Games·Wins

1.e4 c5 2.Nf3 e6

English: Four Knights

53.8%

13 Games·Wins

1.c4 e5 2.Nc3 Nf6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#26g5??

Tactics

vs Abidueva

OTB·2025

▶

#26Kf6??

Tactics

vs Abidueva

OTB·2025

▶

#36Bf2??

Tactics

vs Itgelt

OTB·2025

▶

#30Qxe6??

Tactics

vs Gledura

OTB·2025

▶

#26Nd6??

Tactics

vs Delaney

OTB·2025

▶

#23Rb1??

Tactics

vs Shabalov

Rapid·2025

▶

#30Bxg2??

Tactics

vs Peyrer

Rapid·2025

▶

#45Qf3??

Endgame

vs Nikolov

Blitz·2025

▶

#40Re2??

Tactics

vs Licznerski

Blitz·2025

▶

#20d5??

Tactics

vs Quparadze

Blitz·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

2079 Games

51%26%23%

Move	Games	Performance	%
1.e4	1888		64%
1.d4	177		63%
1.Nf3	12		54%
1.c4 Strong	2		75%

1.e4

64%

1888

1.d4

63%

177

1.Nf3

54%

12

1.c4

75%

2

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