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

Krysa, Leandro

ARG ARG·Born 1992·FIDE #116807·2,237 Games

Classical24462,207 Games

Rapid250624 Games

Blitz24946 Games

Statistics

2237

Total

1080

Wins

607

Draws

549

Losses

48%27%25%

Play Style

What you need to know before facing them

Elite accuracy: 94.0% average

Solid conversion: 82%

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.d4 ♔ (69% in 361 games)

Vulnerable to 1.c4 ♚ (only 43%)

Deep Analysis

Stockfish 18 · Classical games · 447 analyzed

Accuracy by phase

Opening96.6%

Middlegame94.1%

Endgame95.7%

Clutch Factor

Performance under pressure

+7%

Winning (+2 or more)95%

187 Games

Equal position95%

198 Games

Losing (-2 or more)89%

62 Games

Problematic Pieces

Which pieces cause most errors?

♖

25%

77 errors

♕

22%

65 errors

♙

17%

51 errors

♗

15%

45 errors

♞

13%

38 errors

♔

9%

26 errors

Critical Moment

When does the first serious error occur?

Move 43average

1-15

16-25

26-35

36-45

46+

43% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

8

12

10

9

9

8

8

8

10

8

abcdefgh

Many

Few

Critical squares

e512 err

f310 err

f510 err

c49 err

e49 err

e5/f3 concentrate most errors. Force decisions in those zones.

Recent Games

W

Auger, Michael2115

Titled Tue 12th May 2026 · 12 May 2026

0-1

L

Tregubov, Pavel V.2543

Titled Tue 12th May 2026 · 12 May 2026

1-0

L

Jovic, Stanoje2081

Titled Tue 12th May 2026 · 12 May 2026

1-0

W

Nivedita V C2053

Titled Tue 12th May 2026 · 12 May 2026

1-0

L

Nepomniachtchi, Ian2729

Titled Tue 12th May 2026 · 12 May 2026

0-1

L

Kotelva, Lev M2221

Titled Tue 12th May 2026 · 12 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: Kan

45.5%

11 Games·Loses

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

English: Reversed Sicilian

44.4%

9 GamesLow sample·Loses

1.c4 e5 2.Nc3 Nc6

Black

London System

66.7%

9 GamesLow sample·Loses

1.d4 d5 2.Bf4 Nf6

Strengths

AVOID

White

Queen's Gambit Declined

68.6%

35 Games·Wins

1.d4 d5 2.c4 e6

Reti: Double Fianchetto

69.6%

23 Games·Wins

1.Nf3 Nf6 2.g3 d5

Black

Nimzo-Indian: Rubinstein

61.5%

13 Games·Wins

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

Sicilian: e6 Systems

53.6%

69 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#42Qd5??

Endgame

vs Miranda Camus

OTB·2026

▶

#38Qc4??

Tactics

vs Tokman

OTB·2026

▶

#56Ne1??

Endgame

vs Sorin

Blitz·2025

▶

#60Kh8??

Endgame

vs Cumpe

Blitz·2025

▶

#17Ne6??

Tactics

vs Janeczko

OTB·2025

▶

#84Nf3??

Endgame

vs Kollars

OTB·2024

▶

#68Be1??

Endgame

vs So

OTB·2024

▶

#36Nxc3??

Tactics

vs Filip

OTB·2024

▶

#26Nd7??

Tactics

vs Dudin

OTB·2024

▶

#52Bd8??

Endgame

vs Cesar Maestre

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

1143 Games

53%24%23%

Move	Games	Performance	%
1.e4	448		62%
1.d4	361		69%
1.Nf3	175		68%
1.c4	143		68%
1.b4	12		54%
1.g3	3		33%
1.b3 Weak	1		0%

1.e4

62%

448

1.d4

69%

361

1.Nf3

68%

175

1.c4

68%

143

1.b4

54%

12

1.g3

33%

3

1.b3

0%

1

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