IM
De Boer, Gert-Jan
NED·Born 1959·FIDE #1000233·641 Games
NED Classical2430641 Games
Rapid—0 Games
Blitz—0 Games
Statistics
641
Total
223
Wins
222
Draws
196
Losses
35%35%31%
Play Style
What you need to know before facing them
Plays 93.0% better with white
Very consistent (96%)
Very precise: only 0.0 blunders/game
Dominates 1.c4 ♔ (71% in 24 games)
Vulnerable to 1.Nf3 ♚ (only 37%)
Deep Analysis
Stockfish 18 · Classical games · 2 analyzed
Accuracy by phase
Opening95.0%
Middlegame93.2%
Endgame95.6%
Clutch Factor
Performance under pressure
Winning (+2 or more)85%
0 Games
Equal position94%
1 Games
Losing (-2 or more)92%
1 Games
Problematic Pieces
Which pieces cause most errors?
♕
100%
1 errors
♗
0%
0 errors
♔
0%
0 errors
♞
0%
0 errors
♙
0%
0 errors
♖
0%
0 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
abcdefgh
Many
Few
Critical squares
e41 err
Recent Games
W
Comp Mephisto Atlanta
AEGON, The Hague NED · 1 Apr 1997
W
Comp XXXXX
AEGON, The Hague NED · 1 Apr 1997
W
Centaur
? · 17 Apr 1996
L
Comp Schach
AEGON, The Hague NED · 16 Apr 1996
L
Comp Fritz
AEGON, The Hague NED · 15 Apr 1996
D
DREI HIRN
? · 12 Apr 1996
Openings
Based on player games
Weaknesses
EXPLOIT!White
Queen's Gambit Declined
56.3%16 Games·Loses
1.d4 d5 2.c4 e6
Black
Sicilian: e6 Systems
53.5%43 Games·Loses
1.e4 c5 2.Nf3 e6
Reti: Double Fianchetto
55.6%9 GamesLow sample·Loses
1.Nf3 Nf6 2.g3 d5
Strengths
AVOIDWhite
No consistent strengths detected as White
Black
No consistent strengths detected as Black
Critical Blunders
Tactical errors analyzed with Stockfish
1 errors
▶
#26Qxe4??
Tactics
vs Geller
OTB
Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO1997
1996
1995
1993
1992
1991
PRO
8
76
5
4
3
2
1a
b
c
d
efgh334 Games
41%37%22%
1.d4
59%216
1.e4
54%48
1.Nf3
59%45
1.c4
71%24
1.f4
0%1