Leenhouts, Koen

NED NED·Born 1984·FIDE #1008439·2,073 Games

Classical24592,026 Games

Rapid24460 Games

Blitz242447 Games

Play against Leenhouts, Koen's Twin

PRO

Uses their openings, level & style

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

Ready to play

2073 games analyzed

Statistics

Total

2073

Wins

933

Draws

416

Losses

724

45%20%35%

Play Style

What you need to know before facing them

Elite accuracy: 93.1% average

Solid conversion: 91%

Very consistent (89%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (66% in 32 games)

Vulnerable to 1.c4 ♚ (only 44%)

Deep Analysis

Stockfish 18 · Classical games · 316 analyzed

Accuracy by phase

Opening

96.4%

Middlegame

93.0%

Endgame

95.2%

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

+5%

Winning (+2 or more)

94%145g

Equal position

94%100g

Losing (-2 or more)

90%70g

Performance under pressure

Problematic Pieces — Which pieces cause most errors?

27%

77 errors

23%

65 errors

15%

42 errors

15%

42 errors

12%

36 errors

26 errors

Critical Moment — When does the first serious error occur?

Move 42 average

21%

29%

1-15

16-25

26-35

36-45

46+

29% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap — Where do most errors occur?

Few

Many

Errors mapped

101

Hotspot zone

g6 / e4

Critical squares

14 err

13 err

12 err

11 err

g6/e4 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

White53.3%Loses

Nimzo-Indian: Rubinstein — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

30 Games · last played 12 months agoPlay this line

White52.4%Loses

Nimzo-Indian: Capablanca — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3

21 Games · last played 12 months agoPlay this line

Black73.3%Loses

French: Tarrasch — 1.e4 e6 2.d4 d5 3.Nd2

15 Games · last played 2 years agoPlay this line

Black63.6%Loses

Sicilian: Closed — 1.e4 c5 2.Nc3 Nc6

11 Games · last played 3 years agoPlay this line

Strengths

— avoid these lines

White63.4%Wins

King's Indian: Saemisch — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f341 Games

White57.1%Wins

Grünfeld — 1.d4 Nf6 2.c4 g6 3.Nc3 d535 Games

Black46.7%Wins

Sicilian: d6 Systems — 1.e4 c5 2.Nf3 d630 Games

Critical Blunders

10 errors · Stockfish

#35Qd6??Tacticsvs BeukemaOTB · 2025

#35Qd4??Tacticsvs HaringOTB · 2024

#32Rxg2+??Tacticsvs PechacOTB · 2024

#35Qa3??Tacticsvs GoossensOTB · 2024

#29Qg2??Tacticsvs SetyakiOTB · 2024

#38Qb7??Tacticsvs CaruanaOTB · 2024

#38d7??Tacticsvs Van OosteromOTB · 2024

#29Bf4??Tacticsvs NicolaiOTB · 2024

#27Bc5??Tacticsvs SlagboomOTB · 2024

#44Nf3??Endgamevs KumarOTB · 2024

Recent Games

2,073 Games

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1-0

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1-0

Lai, Hing Ting(2441)

TCh-BEL 2025-26 · 15 Mar 2026

½-½

von Mettenheim, Johannes(2375)

2nd Bundesliga Nord 25-26 · 1 Mar 2026

½-½

Spitzl, Vinzent(2359)

2nd Bundesliga Nord 25-26 · 28 Feb 2026

1-0

Van Cappellen, Jonas(2280)

TCh-BEL 2025-26 · 8 Feb 2026

½-½

Endgame Statistics

PRO23 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

1054 Games

52%19%29%

Move	Games	%
1.d4	666	59%
1.e4	326	64%
1.Nf3	32	66%
1.c4	23	59%
1.b3	7	43%

MoveGamesPerformance%

1.d4

666

59%

1.e4

326

64%

1.Nf3

66%

1.c4

59%

1.b3

43%