Westerberg, Jonathan

SWE SWE·Born 1994·FIDE #1701754·1,039 Games

Classical24521,002 Games

Rapid242635 Games

Blitz24622 Games

Statistics

1039

Total

477

Wins

357

Draws

205

Losses

46%34%20%

Play Style

What you need to know before facing them

Elite accuracy: 93.1% average

High resilience (58%): Dangerous even when losing

Very consistent (92%)

Very precise: only 0.1 blunders/game

Dominates 1.e4 ♔ (71% in 326 games)

Deep Analysis

Stockfish 18 · Classical games · 169 analyzed

Accuracy by phase

Opening95.2%

Middlegame93.4%

Endgame95.3%

Clutch Factor

Performance under pressure

+4%

Winning (+2 or more)94%

73 Games

Equal position94%

63 Games

Losing (-2 or more)90%

33 Games

Problematic Pieces

Which pieces cause most errors?

♖

28%

46 errors

♙

20%

33 errors

♕

16%

26 errors

♞

14%

23 errors

♗

12%

20 errors

♔

14 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

40% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

abcdefgh

Many

Few

Critical squares

d48 err

d77 err

e57 err

f46 err

f56 err

d4/d7 concentrate most errors. Force decisions in those zones.

Recent Games

Galperin, Platon2502

TCh-SWE Elitserien · 8 Mar 2026

1-0

Galperin, Platon2504

Rond 9: Galperin, Platon ... · 8 Mar 2026

1-0

Lindberg, Bengt1524

Swedish Team Championship... · 7 Mar 2026

½-½

Olsson, William2385

Swedish Team Championship... · 6 Mar 2026

1-0

Olsson, William2378

Rond 7: Olsson, William -... · 6 Mar 2026

1-0

Seo, Jung Min2492

Swedish Team Championship... · 18 Jan 2026

1-0

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: Closed

62.5%

24 Games·Wins

1.e4 c5 2.Nc3 Nc6

French: Classical

56.3%

16 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Black

Queen's Gambit Accepted

56.1%

57 Games·Wins

1.d4 d5 2.c4 dxc4

Sicilian: e6 Systems

47.4%

38 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#37Nxf3??

Tactics

vs Kucuksari

OTB·2025

▶

#48Qe1+??

Endgame

vs Livner

OTB·2025

▶

#59Ke6??

Endgame

vs Evertsson

OTB·2025

▶

#20Qd5??

Tactics

vs Ivarsson

OTB·2025

▶

#40Qxa4??

Tactics

vs Miezis

OTB·2024

▶

#42g4??

Endgame

vs Hellers

OTB·2024

▶

#33Rf5??

Tactics

vs Skjoldebrand

OTB·2023

▶

#29Bg5??

Tactics

vs Petursson

OTB·2022

▶

#40Rd7+??

Tactics

vs Seo

OTB·2022

▶

#39Ng5+??

Endgame

vs Poley

OTB·2022

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

503 Games

49%36%15%

Move	Games	%
1.e4 Strong	326	71%
1.d4	112	59%
1.Nf3	31	61%
1.c4	23	59%
1.f4 Strong	3	100%
1.Nc3	3	67%
1.g4 Strong	3	100%
1.b3 Strong	2	100%

1.e4

71%

326

1.d4

59%

112

1.Nf3

61%

1.c4

59%

1.f4

100%

1.Nc3

67%

1.g4

100%

1.b3

100%

Westerberg, Jonathan

Play against Westerberg, Jonathan's Twin

Statistics

Play Style

Deep Analysis

Clutch Factor

Problematic Pieces

Critical Moment

Error Heatmap

Recent Games

Openings

Weaknesses

Strengths

Sicilian: Closed

French: Classical

Queen's Gambit Accepted

Sicilian: e6 Systems

Critical Blunders