Tomczak, Jacek

POL POL·Born 1990·FIDE #1124668·1,974 Games

Classical25451,805 Games

Rapid2541131 Games

Blitz252338 Games

Statistics

1974

Total

891

Wins

699

Draws

383

Losses

45%35%19%

Play Style

What you need to know before facing them

Elite accuracy: 93.7% average

Solid conversion: 87%

Very consistent (91%)

Very precise: only 0.1 blunders/game

Dominates 1.e4 ♔ (67% in 958 games)

Deep Analysis

Stockfish 18 · Classical games · 436 analyzed

Accuracy by phase

Opening96.4%

Middlegame93.9%

Endgame94.9%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

172 Games

Equal position95%

189 Games

Losing (-2 or more)90%

75 Games

Problematic Pieces

Which pieces cause most errors?

♖

26%

87 errors

♕

20%

67 errors

♙

18%

62 errors

♞

14%

48 errors

♗

12%

41 errors

♔

11%

36 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

32% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

abcdefgh

Many

Few

Critical squares

e513 err

f512 err

f612 err

c310 err

d210 err

e5/f5 concentrate most errors. Force decisions in those zones.

Recent Games

Ivic, Velimir2630

Bundesliga 2025-26 · 26 Apr 2026

½-½

Predke, Alexandr2609

Bundesliga 2025-26 · 25 Apr 2026

1-0

Vogel, Roven2534

Bundesliga 2025-26 · 24 Apr 2026

1-0

Kollars, Dmitrij2630

German Bundesliga 2025-26 · 22 Mar 2026

1-0

Eljanov, Pavel2659

Schachbundesliga 2025/202... · 21 Mar 2026

½-½

Alekseenko, Kirill2652

SBL München · 1 Mar 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Sicilian: e6 Systems

66.3%

86 Games·Wins

1.e4 c5 2.Nf3 e6

French: Winawer

69.6%

46 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Bb4

Black

English: Four Knights

52.9%

17 Games·Wins

1.c4 e5 2.Nc3 Nf6

Caro-Kann: Main Line

50.0%

12 Games·Wins

1.e4 c6 2.d4 d5 3.Nc3 dxe4

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#36Ra4??

Tactics

vs Fiszer

OTB·2025

▶

#83Nf6??

Endgame

vs Savitha Shri B

OTB·2025

▶

#32Kd7??

Endgame

vs Vetoshko

OTB·2025

▶

#29Ne7??

Tactics

vs Klimkowski

OTB·2025

▶

#42Bxc6??

Endgame

vs Luczak

OTB·2025

▶

#26b3??

Tactics

vs Gaponenko

OTB·2025

▶

#41Ke5??

Endgame

vs Wojtaszek

OTB·2024

▶

#37Kh8??

Tactics

vs Psyk

OTB·2024

▶

#35h6??

Tactics

vs Kulon

Rapid·2023

▶

#90Qf1+??

Endgame

vs Piorun

Rapid·2023

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

2026

2025

2024

2023

2022

2021

PRO

Starting Position

1000 Games

50%34%16%

Move	Games	%
1.e4	958	67%
1.d4	37	62%
1.c4	4	63%
1.f3 Weak	1	0%

1.e4

67%

958

1.d4

62%

1.c4

63%

1.f3

Tomczak, Jacek

Play against Tomczak, Jacek's Twin

Statistics

Play Style

Deep Analysis

Clutch Factor

Problematic Pieces

Critical Moment

Error Heatmap

Recent Games

Openings

Weaknesses

Strengths

Sicilian: e6 Systems

French: Winawer

English: Four Knights

Caro-Kann: Main Line

Critical Blunders