Kuipers, Stefan

NED NED·Born 1990·FIDE #1018400·996 Games

FIDE OTB · #1018400 · 996 Games

Classical2454974 g Games

Rapid—0 g Games

Blitz247122 g Games

Play against Kuipers's Twin

PRO

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

996 games analyzed

Statistics

Total

996

Wins

386

Draws

338

Losses

272

39%34%27%

Play Style

before facing themWhat 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

Opening

96.4%

Middlegame

93.0%

Endgame

94.7%

Clutch Factor

+2%

Winning (+2)Winning (+2)

92%29g

EqualEqual position

95%47g

Losing (−2)Losing (−2)

90%30g

Accuracy under pressure

Problematic Pieces — which cause most errors?

21%

18 err

21%

18 err

16%

14 err

16%

14 err

14%

12 err

12%

10 err

Critical Moment

Move 41 avg

1-15

22%

16-25

11%

26-35

33%

36-45

33%

46+

33% of blunders after move 36-45 — keep the tension until then.of blunders occur in moves 36-45. Keep the tension until that moment.

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

Hotspot zone

d5 / e5

Critical squares

9 err

3 err

d5/e5 account for most of the errors. Force decisions in those zones.

Openings

996 GamesBased on 996 player games

Weaknesses

— exploit these— exploit these lines

aswhite46.2%Losses

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

13 Games · last played 9 months agoPlay this line

aswhite40.9%Losses

French: Classical — 1.e4 e6 2.d4 d5 3.Nc3 Nf6

22 Games · last played 2 years agoPlay this line

asblack54.8%Losses

Sicilian: Rossolimo — 1.e4 c5 2.Nf3 Nc6 3.Bb5

31 Games · last played 9 years agoPlay this line

Strengths

— avoid these— avoid these lines

aswhite70.0%Wins

Sicilian: Rossolimo — 1.e4 c5 2.Nf3 Nc6 3.Bb510 Games · last played 9 years ago

10 Games · last played 9 years ago

aswhite61.5%Wins

Caro-Kann: Main Line — 1.e4 c6 2.d4 d5 3.Nc3 dxe413 Games · last played 3 years ago

13 Games · last played 3 years ago

asblack50.0%Wins

Italian: Giuoco Piano — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc510 Games

10 Games

Critical Blunders

10 errors · Stockfish

#29Rd7??Tacticsvs De SchampheleireOTB · 2025

#51Rf1??Endgamevs AbdullaOTB · 2025

#54Kg8??Endgamevs ZelbelOTB · 2025

#55Nd4??Endgamevs Van GisbergenOTB · 2024

#43Nf2??Endgamevs GurevichOTB · 2024

#31Qf2??Tacticsvs HausrathOTB · 2024

#45Ke5??Endgamevs BlokhuisOTB · 2023

#70Kh8??Endgamevs ZwirsOTB · 2022

#19Rd1??Tacticsvs OkkesOTB · 2022

#28Bxe5??Tacticsvs Van WesselOTB · 2022

Recent Games

996 Games

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Wemmers, Xander(2319)

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1-0

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0-1

Bakker, Jan(2119)

Dutch Meesterklasse 2025-... · 28 Mar 2026

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Dutch Meesterklasse 2025-... · 8 Mar 2026

0-1

Endgame Statistics

PRO57 endgames (45.6%)

Strongest

Weakest

Minor Piece Pairs

Reaches Endgame

45.6%

57 / 125

B vs N Pref

0% · 0%

3 / 0

PiecesTypeWin %Games

Rook + Minor30%30

Rook+Bishop vs Rook+Knight17.6%17

Rook vs Rook21.4%14

Rook + Equal Minors30.8%13

Rook vs Minor (Exchange)33.3%12

Queen vs Pieces20%10

Rook + Minor30%30

Rook+Bishop vs Rook+Knight17.6%17

Rook vs Rook21.4%14

Rook + Equal Minors30.8%13

Rook vs Minor (Exchange)33.3%12

Queen vs Pieces20%10

Weakest: Minor Piece Pairs 0%Show all 22 types

Unlock Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

490 Games

41%36%23%

Move	Games	%
1.e4	452	59%
1.b4	21	64%
1.d4	9	50%
1.Nf3 Weak	4	13%
1.b3 Strong	4	100%

MoveGamesPerformance%

1.e4

452

59%

1.b4

64%

1.d4

50%

1.Nf3Weak

13%

1.b3Strong

100%