Scouting report: Stefan Kuipers (IM, NED)

935 over-the-board games in the Chess Stalker database (916 classical, 19 blitz): 39% wins, 34% draws, 27% losses. FIDE rating 2454 standard, 2471 blitz. 106 games analyzed with Stockfish: 93% accuracy, 0.09 blunders per game.

  • Opening repertoire of Stefan Kuipers 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 Stefan Kuipers's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/1018400 — no account needed.

Stefan Kuipers

IM

Netherlandsborn 1990FIDE ID 1018400

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2420
2460
2500
2448 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2471
2454
2484peak, Jul 2018
935games
361wins, 39%
319draws, 34%
255losses, 27%

Play style

before facing them
Elite accuracy: 92.8% average
Solid conversion: 86%
Very consistent (89%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 as ♔ (59% in 422 games)
Vulnerable to 1.Nf3 ♚ (only 40%)

Play against Kuipers's Twin

Their real openings, level & style

Based on 935 games

Openings

935 games

Weaknesses

where they slip as ♔ White
Sicilian: Classical1.e4 c5 2.f3 d6 3.d4 cxd4 4.xd4 f6 5.c3 c613 games, last played 10 months ago46.2%losses

Strengths

what holds up for them as ♔ White
Sicilian: Rossolimo1.e4 c5 2.f3 c6 3.b510 games, last played 9 years ago70.0%wins
Caro-Kann: Main Line1.e4 c6 2.d4 d5 3.c3 dxe412 games, last played 3 years ago58.3%wins

Deep analysis

Stockfish · Classical · 106 analyzed
Accuracy by phase
Opening
96.4%
Middlegame
93.0%
Endgame
94.7%
Clutch factor
+2%
Winning (+2)
92%
Equal
95%
Losing (−2)
90%
Problematic pieces
21%
18 err
21%
18 err
16%
14 err
16%
14 err
14%
12 err
12%
10 err
Critical moment
Move 41 avg
0%
1-15
22%
16-25
11%
26-35
33%
36-45
33%
46+
33% of blunders occur after move 36-45. Keep tension until then.
Error heatmap · Critical squares
9
Few
Many
d5
9
e5
3
f1
3
f2
3
f7
3
d5/e5 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#29
d7?? vs De Schampheleire
Middlegame · OTB · 2025
#51
f1?? vs Abdulla
Middlegame · OTB · 2025
#54
g8?? vs Zelbel
Endgame · OTB · 2025
#55
d4?? vs Van Gisbergen
Endgame · OTB · 2024
#43
f2?? vs Gurevich
Endgame · OTB · 2024
#31
f2?? vs Hausrath
Middlegame · OTB · 2024

Recent games

Heldenbergh, Nils(2214)

TCh-BEL 2025-26 · 19 Apr 2026

1–0
Kurt, Sascha(2291)

Dutch League 2025-26 · 11 Apr 2026

1–0
Wemmers, Xander(2319)

TCh-BEL 2025-26 · 29 Mar 2026

0–1
Bakker, Jan(2119)

Dutch Meesterklasse 2025-... · 28 Mar 2026

1–0
Bakker, Ja(2119)

Dutch League 2025-26 · 28 Mar 2026

1–0
Grooten, Herman(2181)

Dutch Meesterklasse 2025-... · 8 Mar 2026

1–0

Endgame statistics

Repertoire

PRO
935 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
459 games41%W37%D22%L
Move
1. e4
4225m
41%36%23
60%
1. b4
2123y
43%43%14
64%
1. d4
911y
78%
50%
1. f3
410y
25%75%
13%
1. b3
311y
100%
100%

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