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

Almeida Quintana, Omar

CUB CUB·Born 1981·FIDE #3503313·1,841 Games

Classical24541,805 Games

Rapid248411 Games

Blitz246425 Games

Statistics

1841

Total

853

Wins

718

Draws

268

Losses

46%39%15%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

High resilience (67%): Dangerous even when losing

Solid conversion: 89%

Very consistent (91%)

Very precise: only 0.0 blunders/game

Dominates 1.Nf3 ♔ (77% in 77 games)

Deep Analysis

Stockfish 18 · Classical games · 421 analyzed

Accuracy by phase

Opening95.8%

Middlegame94.3%

Endgame95.0%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)95%

176 Games

Equal position94%

183 Games

Losing (-2 or more)90%

62 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

64 errors

♙

20%

56 errors

♕

18%

49 errors

♞

15%

43 errors

♔

13%

35 errors

♗

11%

32 errors

Critical Moment

When does the first serious error occur?

Move 42average

1-15

16-25

26-35

36-45

46+

40% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

9

8

6

14

11

7

9

9

8

8

abcdefgh

Many

Few

Critical squares

d514 err

e511 err

c49 err

d49 err

d79 err

d5/e5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Khamrakulov, Ibragim S.2356

38th Dos Hermanas Active · 30 May 2026

1-0

W

Hoffmann, Georg Paul1879

38th Dos Hermanas Active · 30 May 2026

0-1

W

Moreno Valle, Agustin2068

38th Dos Hermanas Active · 30 May 2026

1-0

L

Anton Guijarro, David2657

38th Dos Hermanas Active · 30 May 2026

0-1

W

Balbuena Fuentes, Mario2317

38th Dos Hermanas Active · 30 May 2026

1-0

W

Cornejo Corral,Miguel Angel1720

38th Dos Hermanas Active · 30 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

King's Indian: Saemisch

64.3%

14 Games·Wins

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

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#33Qe1+??

Tactics

vs Morales Vigil

OTB·2026

▶

#48Rh7??

Endgame

vs Fus

OTB·2025

▶

#37Rb5??

Tactics

vs Larino Nieto

OTB·2025

▶

#30c6??

Tactics

vs Gracia Alvarez

OTB·2025

▶

#49h4??

Endgame

vs Cofre Archibold

OTB·2025

▶

#31Nc5??

Tactics

vs Duran Vega

OTB·2025

▶

#44Qc4??

Endgame

vs Wartiovaara

OTB·2024

▶

#37Rf2??

Tactics

vs Cabezas Solano

OTB·2024

▶

#52Rxb5??

Endgame

vs Ilinca

OTB·2024

▶

#57Kb5??

Endgame

vs Christodoulou

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

934 Games

49%39%12%

Move	Games	Performance	%
1.d4	826		68%
1.Nf3 Strong	77		77%
1.e4	24		50%
1.c4 Strong	4		88%
1.g3 Strong	2		75%
1.b3 Strong	1		100%

1.d4

68%

826

1.Nf3

77%

77

1.e4

50%

24

1.c4

88%

4

1.g3

75%

2

1.b3

100%

1

🍪 Cookies · Chess Stalker uses technical cookies (required for operation) and analytical cookies (to improve the service). Analytical cookies are optional.