De Boer, Gert-Jan

NED NED·Born 1959·FIDE #1000233·641 Games

FIDE OTB · #1000233 · 641 Games

Classical2430641 g Games

Rapid—0 g Games

Blitz—0 g Games

Play against De Boer's Twin

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Uses their openings, level & style

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641 games analyzed

Statistics

Total

641

Wins

223

Draws

222

Losses

196

35%35%31%

Play Style

before facing themWhat 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

Opening

95.0%

Middlegame

93.2%

Endgame

95.6%

Clutch Factor

-7%

Winning (+2)Winning (+2)

85%0g

EqualEqual position

94%1g

Losing (−2)Losing (−2)

92%1g

Accuracy under pressure

Problematic Pieces — which cause most errors?

100%

1 err

0 err

Critical Moment

Move 30 avg

1-15

16-25

26-35

36-45

46+

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

Hotspot zone

Critical squares

1 err

Openings

641 GamesBased on 641 player games

Weaknesses

— exploit these— exploit these lines

aswhite56.3%Losses

Queen's Gambit Declined — 1.d4 d5 2.c4 e6

16 Games · last played 39 years agoPlay this line

asblack53.5%Losses

Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e6

43 Games · last played 30 years agoPlay this line

asblack55.6%Losses

Reti: Double Fianchetto — 1.Nf3 Nf6 2.g3 d5

9 Games · Low sample · last played 34 years agoPlay this line

Strengths

— avoid these— avoid these lines

No consistent strengths detected as white

No consistent strengths detected as black

Critical Blunders

1 errors · Stockfish

#26Qxe4??Tacticsvs GellerOTB

Recent Games

641 Games

Win

Comp Mephisto Atlanta

AEGON, The Hague NED · 1 Apr 1997

1-0

Win

Comp XXXXX

AEGON, The Hague NED · 1 Apr 1997

1-0

Win

Centaur

? · 17 Apr 1996

1-0

Loss

Comp Schach

AEGON, The Hague NED · 16 Apr 1996

1-0

Loss

Comp Fritz

AEGON, The Hague NED · 15 Apr 1996

0-1

Draw

DREI HIRN

? · 12 Apr 1996

½-½

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

334 Games

41%37%22%

Move	Games	%
1.d4	216	59%
1.e4	48	54%
1.Nf3	45	59%
1.c4Strong	24	71%
1.f4Weak	1	0%

MoveGamesPerformance%

1.d4

216

59%

1.e4

54%

1.Nf3

59%

1.c4Strong

71%

1.f4Weak