Scouting report: Koen Leenhouts (GM, NED)

1,979 over-the-board games in the Chess Stalker database (1,937 classical, 42 blitz): 45% wins, 19% draws, 35% losses. FIDE rating 2428 standard, 2446 rapid, 2424 blitz. 316 games analyzed with Stockfish: 93% accuracy, 0.05 blunders per game.

  • Opening repertoire of Koen Leenhouts as White and Black, with results per line — free.
  • Weaknesses and blunder patterns, evaluated with Stockfish — free.
  • Recent over-the-board games and endgame statistics.
  • Twin Bot: a sparring bot that imitates Koen Leenhouts's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/1008439 — no account needed.

Chess Stalker

Koen Leenhouts

GM

Netherlandsborn 1984FIDE ID 1008439

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2380
2420
2460
2500
2444 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2446
2428
2424
2513peak, Nov 2016
1,979games
895wins, 45%
384draws, 19%
700losses, 35%

Play style

before facing them
Elite accuracy: 93.1% average
Solid conversion: 88%
Very consistent (89%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 as ♔ (64% in 322 games)
Vulnerable to 1.c4 ♚ (only 45%)

Play against Leenhouts's Twin

Their real openings, level & style

Based on 1,979 games

Openings

1,979 games

Weaknesses

where they slip as ♔ White
Benko Gambit1.d4 ♞f6 2.c4 c5 3.d5 b5only 8 games, last played 2 months ago75.0%losses
Nimzo-Indian: Rubinstein1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e328 games, last played 2 months ago53.6%losses

Strengths

what holds up for them as ♔ White
Modern Benoni1.d4 ♞f6 2.c4 c5 3.d5 e611 games, last played 3 years ago81.8%wins
King's Indian: Saemisch1.d4 ♞f6 2.c4 g6 3.♞c3 ♝g7 4.e4 d6 5.f339 games, last played last year61.5%wins

Deep analysis

Stockfish · Classical · 316 analyzed
Accuracy by phase
Opening
96.4%
Middlegame
93.0%
Endgame
95.2%
Clutch factor
+5%
Winning (+2)
94%
Equal
94%
Losing (−2)
90%
Problematic pieces
27%
77 err
23%
65 err
15%
42 err
15%
42 err
12%
36 err
9%
26 err
Critical moment
Move 42 avg
0%
1-15
21%
16-25
21%
26-35
29%
36-45
29%
46+
29% of blunders occur after move 36-45. Keep tension until then.
Error heatmap · Critical squares
14
12
13
Few
Many
g6
14
e4
13
h6
12
d4
11
d7
11
g6/e4 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#35
♛d6?? vs Beukema
Middlegame · OTB · 2025
#35
♛d4?? vs Haring
Endgame · OTB · 2024
#32
♜xg2+?? vs Pechac
Middlegame · OTB · 2024
#35
♛a3?? vs Goossens
Middlegame · OTB · 2024
#29
♛g2?? vs Setyaki
Middlegame · OTB · 2024
#38
♛b7?? vs Caruana
Middlegame · OTB · 2024

Recent games

Dessyn, Timothee(2257)

Dutch Open 2026 · 29 Jul 2026

1–0
Nemegeer, Arne(2292)

Dutch Open 2026 · 28 Jul 2026

½–½
Vandenhole, Kobe(2319)

Dutch Open 2026 · 27 Jul 2026

0–1
Lahaye, Rick(2394)

Dutch Open 2026 · 26 Jul 2026

½–½
Dovgaliuk, Oleksandr(2305)

Dutch Open 2026 · 25 Jul 2026

1–0
Chitlange Sakshi(2220)

Dutch Open 2026 · 24 Jul 2026

1–0

Endgame statistics

Repertoire

PRO
1,979 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
1,011 games52%W18%D30%L
Move
1. d4
6287w
50%1832%
59%
1. e4
3221y
55%1827%
64%
1. ♞f3
321y
56%1925%
66%
1. c4
231y
43%30%27%
59%
1. b3
63y
33%33%34%
50%

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