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

Nguyen, Ngoc Truong Son

VIE VIE·Born 1990·FIDE #12401110·3,781 Games

Classical26003,429 Games

Rapid2512149 Games

Blitz2532223 Games

Statistics

3781

Total

1930

Wins

1039

Draws

812

Losses

51%27%21%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average

Solid conversion: 86%

Very consistent (87%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 ♔ (72% in 78 games)

Deep Analysis

Stockfish 18 · Classical games · 344 analyzed

Accuracy by phase

Opening96.5%

Middlegame93.7%

Endgame94.9%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)94%

134 Games

Equal position95%

139 Games

Losing (-2 or more)89%

71 Games

Problematic Pieces

Which pieces cause most errors?

♖

28%

93 errors

♙

18%

60 errors

♞

15%

50 errors

♔

14%

45 errors

♕

14%

46 errors

♗

11%

36 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

50% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

9

9

11

13

10

10

10

9

9

9

abcdefgh

Many

Few

Critical squares

g513 err

f511 err

a410 err

c410 err

e410 err

g5/f5 concentrate most errors. Force decisions in those zones.

Recent Games

D

Aradhya, Garg2407

3rd 3-0 Thu 28th May 2026 · 28 May 2026

½-½

W

Atwell, Rose2383

3rd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Taher, Yoseph Theolifus2451

3rd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

D

Gurbanov, Ismayil2077

3rd 3-0 Thu 28th May 2026 · 28 May 2026

½-½

L

Andreikin, Dmitry2710

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

1-0

W

Nivedita V C2053

3rd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

Scotch: Mieses

54.5%

11 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6

Strengths

AVOID

White

Queen's Gambit Accepted

80.0%

10 Games·Wins

1.d4 d5 2.c4 dxc4

Caro-Kann: Advance

67.2%

64 Games·Wins

1.e4 c6 2.d4 d5 3.e5

Black

Caro-Kann: Exchange

66.7%

12 Games·Wins

1.e4 c6 2.d4 d5 3.exd5

Sicilian: e6 Systems

62.3%

53 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#13Qxd5??

Tactics

vs Sarana

OTB·2026

▶

#57Kh3??

Endgame

vs Gurbanov

OTB·2026

▶

#73Rc6??

Endgame

vs Le Tuan

OTB·2026

▶

#31Nh7??

Tactics

vs Pranesh M

OTB·2026

▶

#26Qe4??

Tactics

vs Xiong

OTB·2026

▶

#38Rc8??

Tactics

vs Gurbanov

OTB·2026

▶

#14Qg6+??

Tactics

vs Svane

OTB·2026

▶

#53Kf3??

Endgame

vs Shafer

OTB·2026

▶

#76Rxa4??

Endgame

vs Theodorou

OTB·2026

▶

#99g4??

Endgame

vs Terry

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

1894 Games

54%27%19%

Move	Games	Performance	%
1.e4	891		68%
1.d4	822		67%
1.c4 Strong	78		72%
1.Nf3	73		69%
1.c3	9		61%
1.b3	8		69%
1.f4	8		69%
1.d3 Strong	2		100%
1.e3	2		50%
1.g3 Strong	1		100%

1.e4

68%

891

1.d4

67%

822

1.c4

72%

78

1.Nf3

69%

73

1.c3

61%

9

1.b3

69%

8

1.f4

69%

8

1.d3

100%

2

1.e3

50%

2

1.g3

100%

1

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