Kosakowski, Jakub

POL POL·Born 2002·FIDE #1185080

2540Classical

2533Rapid

2524Blitz

Statistics

Total3,131

Wins1,691

Draws627

Losses807

54%20%26%

Play Style

before facing themWhat you need to know before facing them

Elite accuracy: 93.6% average

Solid conversion: 85%

Very consistent (91%)

Very precise: only 0.1 blunders/game

Dominates 1.c4 as

(81% in 26 games)

Vulnerable to 1.b3

(only 48%)

Play against Kosakowski's Twin

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

3,131 games analyzed

Deep Analysis

Stockfish 18 · Classical · 703 analyzedStockfish 18 · Classical games · 703 analyzed

Accuracy by phase

Opening

96.8%

Middlegame

93.3%

Endgame

95.1%

Clutch Factor

+5%

Winning (+2)Winning (+2)

95%226g

EqualEqual position

95%174g

Losing (−2)Losing (−2)

90%100g

Accuracy under pressure

Problematic Pieces — which cause most errors?

27%

111 err

19%

77 err

17%

71 err

15%

63 err

12%

51 err

10%

41 err

Critical Moment

Move 41 avg

1-15

16-25

43%

26-35

14%

36-45

36%

46+

43% of blunders occur after move 26-35 — keep tension until then.of blunders occur after move 26-35 — keep tension until then.

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

120

Hotspot zone

d5 / e3

Critical squares

14 err

13 err

12 err

d5/e3 concentrate most errors. Force decisions in those zones.

Openings

3,131 gamesBased on 3,131 player games

Weaknesses

— exploit these— exploit these lines

No significant weaknesses detected as white

asblack53.3%losses

Nimzowitsch-Larsen — 1.b3 g6 2.Bb2 Nf6

15 games · last played 6 months agoPlay this line

Strengths

— avoid these— avoid these lines

aswhite75.0%wins

Slav Defense — 1.d4 d5 2.c4 c612 g12 games · last played 5 months ago

aswhite59.0%wins

Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e6134 g134 games · last played 3 weeks ago

asblack76.9%wins

Trompowsky Attack — 1.d4 Nf6 2.Bg5 d513 g13 games · last played 6 months ago

asblack52.9%wins

Sicilian: d6 Systems — 1.e4 c5 2.Nf3 d6206 g206 games · last played 3 weeks ago

Critical Blunders

10 errors · Stockfish

#34Qe3??Tacticsvs KazakouskiOTB · 2026

#33Ne3??Tacticsvs AndreikinOTB · 2026

#28R3f6??Tacticsvs MaghsoodlooOTB · 2026

#14Nxe5??Tacticsvs PranavOTB · 2026

#44Rhg2+??Endgamevs SevianOTB · 2026

#63g5??Endgamevs BortnykOTB · 2026

#55Kg8??Endgamevs LagardeOTB · 2026

#28b5??Tacticsvs Van ForeestOTB · 2026

#37Rb7??Tacticsvs MovahedOTB · 2026

#41b6??Endgamevs DudaOTB · 2026