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

Mahdavi, Reza

IRI IRI·Born 2008·FIDE #12595926·2,475 Games

Classical24942,442 Games

Rapid24718 Games

Blitz242425 Games

Statistics

2475

Total

1488

Wins

284

Draws

703

Losses

60%11%28%

Play Style

What you need to know before facing them

Elite accuracy: 91.9% average

Solid conversion: 89%

Very consistent (88%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (80% in 23 games)

Deep Analysis

Stockfish 18 · Classical games · 233 analyzed

Accuracy by phase

Opening96.4%

Middlegame92.3%

Endgame94.9%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)93%

110 Games

Equal position95%

63 Games

Losing (-2 or more)88%

60 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

72 errors

♕

22%

70 errors

♗

18%

55 errors

♙

15%

47 errors

♔

13%

40 errors

♞

9%

29 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

32% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

11

10

17

9

9

8

8

9

9

8

abcdefgh

Many

Few

Critical squares

e517 err

c811 err

b510 err

c49 err

e39 err

e5/c8 concentrate most errors. Force decisions in those zones.

Recent Games

D

Deac, Bogdan-Daniel2650

1st 3-0 Thu 28th May 2026 · 28 May 2026

½-½

D

Verkholantcev, Andrei2204

1st 3-0 Thu 28th May 2026 · 28 May 2026

½-½

D

Teterev, Vitaly2239

1st 3-0 Thu 28th May 2026 · 28 May 2026

½-½

W

Meirkhanuly, Akylzhan2265

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Tikhonov, Viacheslav2148

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Pribelszky, Bence2375

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: Taimanov

46.7%

15 Games·Loses

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Caro-Kann: Exchange

90.0%

10 Games·Wins

1.e4 c6 2.d4 d5 3.exd5

Reti: Double Fianchetto

80.0%

15 Games·Wins

1.Nf3 Nf6 2.g3 g6

Black

Catalan

66.7%

12 Games·Wins

1.d4 Nf6 2.c4 e6 3.g3

Reti vs King's Indian

64.0%

25 Games·Wins

1.Nf3 Nf6 2.c4 g6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#30b5??

Tactics

vs Xiong

OTB·2026

▶

#29Qc6??

Tactics

vs Skvortsov

OTB·2026

▶

#36Qh5??

Tactics

vs Caruana

OTB·2026

▶

#79Bf8??

Endgame

vs Taher

OTB·2026

▶

#14Nb5??

Tactics

vs Bluebaum

OTB·2026

▶

#28gxf5??

Tactics

vs Suleymanli

OTB·2026

▶

#30Qb5??

Tactics

vs Tahmasebi

OTB·2026

▶

#29Rxg7??

Tactics

vs Lukachewski Junior

OTB·2026

▶

#20Na5??

Tactics

vs Deac

OTB·2026

▶

#32Bb2??

Tactics

vs Estrada Nieto

OTB·2026

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

1247 Games

64%12%24%

Move	Games	Performance	%
1.e4	1030		69%
1.Nf3 Strong	114		76%
1.d4	44		68%
1.b3 Strong	34		77%
1.c4 Strong	23		80%
1.g3 Strong	2		100%

1.e4

69%

1030

1.Nf3

76%

114

1.d4

68%

44

1.b3

77%

34

1.c4

80%

23

1.g3

100%

2

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