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

IM

Karttunen, Mika

FIN FIN·Born 1981·FIDE #502081·3,713 Games

Classical24973,701 Games

Rapid24002 Games

Blitz239610 Games

Statistics

3713

Total

1815

Wins

676

Draws

1222

Losses

49%18%33%

Play Style

What you need to know before facing them

Elite accuracy: 93.7% average

High resilience (64%): Dangerous even when losing

Solid conversion: 91%

Very consistent (92%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (78% in 58 games)

Vulnerable to 1.b3 ♚ (only 38%)

Deep Analysis

Stockfish 18 · Classical games · 119 analyzed

Accuracy by phase

Opening96.3%

Middlegame93.6%

Endgame95.9%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

52 Games

Equal position95%

46 Games

Losing (-2 or more)90%

21 Games

Problematic Pieces

Which pieces cause most errors?

♖

26%

23 errors

♞

16%

14 errors

♕

16%

14 errors

♗

15%

13 errors

♙

15%

13 errors

♔

12%

11 errors

Critical Moment

When does the first serious error occur?

Move 48average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

3

5

4

3

3

6

3

3

5

3

abcdefgh

Many

Few

Critical squares

g46 err

e25 err

f75 err

g54 err

a43 err

g4/e2 concentrate most errors. Force decisions in those zones.

Recent Games

L

Jovic, Stanoje2081

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Dreelinck, Jacob2312

Titled Tue 26th May 2026 · 26 May 2026

1-0

W

Savran, Bora2080

Titled Tue 26th May 2026 · 26 May 2026

1-0

L

Rustamov, Rustam2340

Titled Tue 26th May 2026 · 26 May 2026

0-1

L

Postnikov, Artem2292

Titled Tue 26th May 2026 · 26 May 2026

1-0

L

Caruana, Fabiano2788

Titled Tue 26th May 2026 · 26 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Ruy Lopez: Marshall

62.5%

8 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5

King's Indian: Saemisch

60.0%

10 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3

Black

Catalan

57.1%

14 Games·Loses

1.d4 Nf6 2.c4 e6 3.g3

Grünfeld

54.2%

24 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 d5

Strengths

AVOID

White

Italian: Two Knights

92.3%

13 Games·Wins

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

King's Indian: Main Line

75.0%

16 Games·Wins

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

Black

Ruy Lopez: Marshall

83.3%

12 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5

Sicilian: d6 Systems

48.5%

198 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#18Qf4??

Tactics

vs Nyback

OTB·2025

▶

#40Kg7??

Tactics

vs Kiili

OTB·2023

▶

#51Bxh3??

Endgame

vs Sammalvuo

OTB·2023

▶

#21Ng4+??

Tactics

vs Nouro

OTB·2023

▶

#35Qc7??

Tactics

vs Maurizzi

OTB·2022

▶

#65Ra4+??

Endgame

vs Suarez Uriel

OTB·2022

▶

#42d4??

Endgame

vs Barrish

OTB·2022

▶

#24Nd8??

Tactics

vs Prraneeth Vuppala

OTB·2022

▶

#38Rh1??

Tactics

vs Sipila

OTB·2022

▶

#49b5??

Endgame

vs Pohjala

OTB·2020

Endgame Statistics

21 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

1850 Games

53%16%31%

Move	Games	Performance	%
1.e4	839		58%
1.d4	741		65%
1.c4	202		59%
1.Nf3 Strong	58		78%
1.Nc3	4		50%
1.g3 Strong	3		83%
1.b3 Strong	2		100%
1.f4 Weak	1		0%

1.e4

58%

839

1.d4

65%

741

1.c4

59%

202

1.Nf3

78%

58

1.Nc3

50%

4

1.g3

83%

3

1.b3

100%

2

1.f4

0%

1

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