GM

Leenhouts, Koen

NED NED·Born 1984·FIDE #1008439·2,072 Games

Classical24662,025 Games
Rapid24430 Games
Blitz242447 Games

Statistics

2072

Total

933

Wins

416

Draws

723

Losses

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 · 307 analyzed

Accuracy by phase
Opening96.4%
Middlegame93.1%
Endgame95.3%

Clutch Factor

Performance under pressure

+5%
Winning (+2 or more)94%
143 Games
Equal position94%
100 Games
Losing (-2 or more)90%
64 Games

Problematic Pieces

Which pieces cause most errors?

♖
26%
72 errors
♕
23%
62 errors
♙
15%
41 errors
♞
14%
39 errors
♗
12%
34 errors
♔
9%
25 errors

Critical Moment

When does the first serious error occur?

Move 44average
1-15
16-25
26-35
36-45
46+
31% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

10
13
12
8
7
8
7
11
13
9
abcdefgh
Many
Few
Critical squares
e413 err
g613 err
h612 err
d411 err
d710 err
e4/g6 concentrate most errors. Force decisions in those zones.

Recent Games

W
Garrido Outon, Alex2420

TCh-BEL 2025-26 · 29 Mar 2026

1-0
D
Lai, Hing Ting2441

TCh-BEL 2025-26 · 15 Mar 2026

½-½
D
von Mettenheim, Johannes2375

2nd Bundesliga Nord 25-26 · 1 Mar 2026

½-½
W
Spitzl, Vinzent2359

2nd Bundesliga Nord 25-26 · 28 Feb 2026

1-0
D
Van Cappellen, Jonas2280

TCh-BEL 2025-26 · 8 Feb 2026

½-½
W
Dambacher, Martijn2476

Round 7: Dambacher, Marti... · 7 Feb 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!
White
Nimzo-Indian: Rubinstein
53.3%
30 Games·Loses

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

Nimzo-Indian: Capablanca
52.4%
21 Games·Loses

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3

Black
French: Tarrasch
73.3%
15 Games·Loses

1.e4 e6 2.d4 d5 3.Nd2

Sicilian: Closed
63.6%
11 Games·Loses

1.e4 c5 2.Nc3 Nc6

Strengths

AVOID
White
King's Indian: Saemisch
63.4%
41 Games·Wins

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

Grünfeld
57.1%
35 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 d5

Black
Sicilian: d6 Systems
46.7%
30 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#35Qd6??
Tactics
vs Beukema
OTB·2025
▶
#35Qd4??
Tactics
vs Haring
OTB·2024
▶
#32Rxg2+??
Tactics
vs Pechac
OTB·2024
▶
#35Qa3??
Tactics
vs Goossens
OTB·2024
▶
#29Qg2??
Tactics
vs Setyaki
OTB·2024
▶
#38d7??
Tactics
vs Van Oosterom
OTB·2024
▶
#42Qa6??
Endgame
vs Jansen
OTB·2024
▶
#27Bc5??
Tactics
vs Slagboom
OTB·2024
▶
#44Nf3??
Endgame
vs Kumar
OTB·2024
▶
#37Qa5??
Tactics
vs Timmerman
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
1054 Games
52%19%29%
1.d4
59%
666
1.e4
64%
326
1.Nf3
66%
32
1.c4
59%
23
1.b3
43%
7
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