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

Ivanisevic, Ivan

SRB SRB·Born 1977·FIDE #912417·3,936 Games

Classical25283,669 Games

Rapid253299 Games

Blitz2518172 Games

Statistics

3936

Total

1889

Wins

1213

Draws

833

Losses

48%31%21%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

Solid conversion: 81%

Very consistent (86%)

Very precise: only 0.1 blunders/game

Dominates 1.b3 ♔ (75% in 10 games)

Deep Analysis

Stockfish 18 · Classical games · 522 analyzed

Accuracy by phase

Opening96.0%

Middlegame93.4%

Endgame94.8%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

219 Games

Equal position95%

170 Games

Losing (-2 or more)90%

111 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

98 errors

♕

18%

77 errors

♙

17%

72 errors

♞

16%

71 errors

♗

14%

59 errors

♔

13%

57 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 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

12

14

15

16

12

15

15

16

16

16

abcdefgh

Many

Few

Critical squares

d516 err

e416 err

f316 err

f416 err

f515 err

d5/e4 concentrate most errors. Force decisions in those zones.

Recent Games

L

Malek,Jan2560

TCh-AUT Rapid 2026 · 17 May 2026

1-0

D

Nemeth, Miklos2432

TCh-AUT Rapid 2026 · 17 May 2026

½-½

D

Erdos, Viktor2551

TCh-AUT Rapid 2026 · 17 May 2026

½-½

W

Santos Latasa, Jaime2615

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Shimanov, Aleksandr2581

TCh-AUT Rapid 2026 · 17 May 2026

0-1

W

Willems, Niels2388

TCh-AUT Rapid 2026 · 17 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: d6 Systems

77.8%

9 GamesLow sample·Loses

1.e4 c5 2.Nf3 d6

Sicilian: e6 Systems

54.5%

11 Games·Loses

1.e4 c5 2.Nf3 e6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

King's Indian: Main Line

60.4%

48 Games·Wins

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

Catalan

58.6%

29 Games·Wins

1.d4 Nf6 2.c4 e6 3.g3

Black

Sicilian: e6 Systems

45.6%

215 Games·Wins

1.e4 c5 2.Nf3 e6

London System

63.6%

11 Games·Wins

1.d4 Nf6 2.Bf4 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#38Nd6??

Tactics

vs Cabarkapa

OTB·2025

▶

#51Rf7+??

Endgame

vs Bharath Subramaniyam H

OTB·2025

▶

#49b5??

Endgame

vs Petkov

OTB·2025

▶

#24Rhd1??

Tactics

vs Balint

OTB·2025

▶

#32Qb7??

Tactics

vs Maurizzi

OTB·2025

▶

#76Re6??

Endgame

vs Balint

OTB·2025

▶

#26Qd6??

Tactics

vs Svane

OTB·2024

▶

#43Re3??

Endgame

vs Ahmad

OTB·2024

▶

#42Bxf6??

Endgame

vs Karthik V

OTB·2024

▶

#63Ke6??

Endgame

vs Ciolek

OTB·2024

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

1970 Games

51%29%20%

Move	Games	Performance	%
1.d4	1491		67%
1.c4	219		66%
1.e4	171		58%
1.Nf3	67		60%
1.b3 Strong	10		75%
1.g3	7		57%
1.c3 Strong	4		75%
1.Nc3	1		50%

1.d4

67%

1491

1.c4

66%

219

1.e4

58%

171

1.Nf3

60%

67

1.b3

75%

10

1.g3

57%

7

1.c3

75%

4

1.Nc3

50%

1

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