Coen Zuidema
IMNetherlandsborn 1942FIDE ID 1000101
Rating & statistics
FIDE rating lists · Sep 2023 – Sep 20262420
2460
2450 · Sep 2023
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2450Classical
2450peak, Jan 2001
461games
144wins, 31%
192draws, 42%
125losses, 27%
Play style
before facing themWhat you need to know before facing themElite accuracy: 94.0% average
Plays 5.5% better with white
Very consistent (90%)
Very precise: only 0.0 blunders/game
Dominates 1.d4 as
(58% in 62 games)
Vulnerable to 1.Nf3
(only 38%)
Play against Zuidema's Twin
Their real openings, level & style
Practice against a bot that uses their real openings and playing style
Based on 461 games
Openings
461 gamesBased on 461 player gamesWeaknesses
where they slip as ♔ WhiteSicilian: d6 Systems1.e4 c5 2.♞f3 d631 games, last played 45 years ago41.9%losses
Strengths
what holds up for them as ♔ WhiteSicilian: Kan1.e4 c5 2.♞f3 e6 3.d4 cxd4 4.♞xd4 a616 games56.3%wins
Deep analysis
Stockfish · Classical · 16 analyzedStockfish · Classical games · 16 analyzedAccuracy by phase
Opening
96.0%
Middlegame
93.1%
Endgame
93.7%
Clutch factor
-5%Winning (+2)Winning (+2)
85%0g
EqualEqual position
97%4g
Losing (−2)Losing (−2)
90%12g
Accuracy under pressure barely drops when losing.
Problematic pieces
29%
10 err
26%
9 err
15%
5 err
15%
5 err
9%
3 err
6%
2 err
Critical moment
Move 30 avg0%
0%
0%
0%
0%
Error heatmap · Critical squaresError heatmap
4
FewMany
22Errors mapped
d5 / f8Hotspot zone
d5
44 err
f8
33 err
g8
33 err
b6
22 err
c5
22 err
d5/f8 concentrate most errors. Force decisions in those zones.
d5/f8 concentrate most errors. Force decisions in those zones.
Critical blunders
Tactical errors analyzed with StockfishNo blunders recorded
Recent games
461 gamesVan der Wiel, John T.H.(2555)
Nederland tt · 1 Jan 1986
Douwes, I.
Hilversum NED · 1 Jan 1986
Van der Wiel, John T.H.(2470)
NED · 9 Jan 1982
Van der Poel, Henk
KNSB · 1 Jan 1982
Bredewout, Henk
NED · 1 Jan 1977
Van Schoor, Karl
Willemstad AHO · 5 Sept 1976
Endgame statistics
8 endgames (50%)Unlock Endgame Statistics
All their endgames: discover where they collapse under pressure
Repertoire
PROTime controls · Years · Events
461 games in scope
8
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Explore the repertoireevery move played, ranked by frequency
228 games33%W45%D22%L
228games in this linewon 33%, drew 45%, lost 22%
Move
1. e4
221Jan 198233%46%21%
56%1. d4
3—33%067%
33%1. c4
1—00100%
0%1. a3
1—100%00
100%1. ♞f3
1—100%00
100%1. b3
1—0100%0
50%