IM
Zuidema, Coen
NED·Born 1942·FIDE #1000101·461 Games
NED Classical2450461 Games
Rapid—0 Games
Blitz—0 Games
Statistics
461
Total
144
Wins
192
Draws
125
Losses
31%42%27%
Play Style
What you need to know before facing them
Elite accuracy: 94.0% average
Plays 5.5% better with white
Very consistent (90%)
Very precise: only 0.0 blunders/game
Dominates 1.d4 ♚ (58% in 62 games)
Vulnerable to 1.Nf3 ♚ (only 38%)
Deep Analysis
Stockfish 18 · Classical games · 16 analyzed
Accuracy by phase
Opening96.0%
Middlegame93.1%
Endgame93.7%
Clutch Factor
Performance under pressure
Winning (+2 or more)85%
0 Games
Equal position97%
4 Games
Losing (-2 or more)90%
12 Games
Problematic Pieces
Which pieces cause most errors?
♗
29%
10 errors
♞
26%
9 errors
♔
15%
5 errors
♖
15%
5 errors
♙
9%
3 errors
♕
6%
2 errors
Critical Moment
When does the first serious error occur?
Move 30average
1-15
16-25
26-35
36-45
46+
Error Heatmap
Where do most errors occur?
1
3
3
2
2
2
2
2
4
1
abcdefgh
Many
Few
Critical squares
d54 err
f83 err
g83 err
b62 err
c52 err
d5/f8 concentrate most errors. Force decisions in those zones.
Recent Games
L
Douwes, I.
? · 1 Jan 1986
L
Van der Wiel, John T.H.2555
? · 1 Jan 1986
W
Van der Wiel, John T.H.2470
? · 9 Jan 1982
W
Van der Poel, Henk
? · 1 Jan 1982
W
Bredewout, Henk
? · 1 Jan 1977
W
Van Schoor, Karl
? · 5 Sept 1976
Openings
Based on player games
Weaknesses
EXPLOIT!White
Sicilian: d6 Systems
41.9%31 Games·Loses
1.e4 c5 2.Nf3 d6
Black
No significant weaknesses detected as Black
Strengths
AVOIDWhite
Sicilian: Kan
56.3%16 Games·Wins
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6
Black
Nimzo-Indian: Rubinstein
60.0%10 Games·Wins
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3
Critical Blunders
Tactical errors analyzed with Stockfish
No blunders recorded
Endgame Statistics
9 endgame categories analyzed — discover where they collapse under pressure
Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO1986
1982
1977
1976
1975
1974
PRO
8
76
5
4
3
2
1a
b
c
d
efgh228 Games
33%45%22%
1.e4
56%221
1.d4
33%3
1.c4
0%1
1.a3
100%1
1.Nf3
100%1
1.b3
50%1