Kuipers, Stefan

NED NED·Born 1990·FIDE #1018400·995 Games

Classical2449973 Games

Rapid—0 Games

Blitz247122 Games

Statistics

995

Total

385

Wins

338

Draws

272

Losses

39%34%27%

Play Style

What you need to know before facing them

Elite accuracy: 92.8% average

Solid conversion: 86%

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.b4 ♔ (64% in 21 games)

Vulnerable to 1.Nf3 ♚ (only 42%)

Deep Analysis

Stockfish 18 · Classical games · 106 analyzed

Accuracy by phase

Opening96.4%

Middlegame93.0%

Endgame94.7%

Clutch Factor

Performance under pressure

+2%

Winning (+2 or more)92%

29 Games

Equal position95%

47 Games

Losing (-2 or more)90%

30 Games

Problematic Pieces

Which pieces cause most errors?

♞

21%

18 errors

♖

21%

18 errors

♔

16%

14 errors

♕

16%

14 errors

♙

14%

12 errors

♗

12%

10 errors

Critical Moment

When does the first serious error occur?

Move 41average

1-15

16-25

26-35

36-45

46+

33% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

abcdefgh

Many

Few

Critical squares

d59 err

e53 err

f13 err

f23 err

f73 err

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

Recent Games

Kurt, Sascha2291

Dutch League 2025-26 · 11 Apr 2026

1-0

Wemmers, Xander2319

TCh-BEL 2025-26 · 29 Mar 2026

1-0

Bakker, Jan2119

Dutch Meesterklasse 2025-... · 28 Mar 2026

0-1

Bakker, Ja2119

Dutch League 2025-26 · 28 Mar 2026

0-1

Grooten, Herman2181

Dutch Meesterklasse 2025-... · 8 Mar 2026

0-1

Van der Hagen, Loek2212

Dutch Meesterklasse 2025-... · 7 Feb 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: Classical

46.2%

13 Games·Loses

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6

French: Classical

40.9%

22 Games·Loses

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Black

Sicilian: Rossolimo

54.8%

31 Games·Loses

1.e4 c5 2.Nf3 Nc6 3.Bb5

Strengths

AVOID

White

Sicilian: Rossolimo

70.0%

10 Games·Wins

1.e4 c5 2.Nf3 Nc6 3.Bb5

Caro-Kann: Main Line

61.5%

13 Games·Wins

1.e4 c6 2.d4 d5 3.Nc3 dxe4

Black

Italian: Giuoco Piano

50.0%

10 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#29Rd7??

Tactics

vs De Schampheleire

OTB·2025

▶

#51Rf1??

Endgame

vs Abdulla

OTB·2025

▶

#54Kg8??

Endgame

vs Zelbel

OTB·2025

▶

#55Nd4??

Endgame

vs Van Gisbergen

OTB·2024

▶

#43Nf2??

Endgame

vs Gurevich

OTB·2024

▶

#31Qf2??

Tactics

vs Hausrath

OTB·2024

▶

#45Ke5??

Endgame

vs Blokhuis

OTB·2023

▶

#70Kh8??

Endgame

vs Zwirs

OTB·2022

▶

#19Rd1??

Tactics

vs Okkes

OTB·2022

▶

#28Bxe5??

Tactics

vs Van Wessel

OTB·2022

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

2026

2025

2024

2023

2022

2021

PRO

Starting Position

489 Games

41%36%23%

Move	Games	%
1.e4	451	59%
1.b4	21	64%
1.d4	9	50%
1.Nf3 Weak	4	13%
1.b3 Strong	4	100%

1.e4

59%

451

1.b4

64%

1.d4

50%

1.Nf3

13%

1.b3

100%

Kuipers, Stefan

Play against Kuipers, Stefan's Twin

Statistics

Play Style

Deep Analysis

Clutch Factor

Problematic Pieces

Critical Moment

Error Heatmap

Recent Games

Openings

Weaknesses

Sicilian: Classical

French: Classical

Sicilian: Rossolimo

Strengths

Sicilian: Rossolimo

Caro-Kann: Main Line

Italian: Giuoco Piano

Critical Blunders