Hjartarson, Johann

ISL ISL·Born 1963·FIDE #2300044·2,798 Games

Classical24662,561 Games

Rapid240594 Games

Blitz2424143 Games

Statistics

2798

Total

1225

Wins

803

Draws

769

Losses

44%29%27%

Play Style

What you need to know before facing them

Elite accuracy: 92.8% average

Solid conversion: 83%

Very consistent (86%)

Very precise: only 0.1 blunders/game

Dominates 1.g3 ♚ (73% in 11 games)

Deep Analysis

Stockfish 18 · Classical games · 306 analyzed

Accuracy by phase

Opening96.6%

Middlegame92.9%

Endgame94.6%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

102 Games

Equal position95%

109 Games

Losing (-2 or more)89%

95 Games

Problematic Pieces

Which pieces cause most errors?

♙

22%

84 errors

♖

21%

80 errors

♕

17%

63 errors

♞

16%

59 errors

♗

14%

54 errors

♔

34 errors

Critical Moment

When does the first serious error occur?

Move 32average

1-15

16-25

26-35

36-45

46+

41% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

abcdefgh

Many

Few

Critical squares

d115 err

f613 err

f412 err

d411 err

g511 err

d1/f6 concentrate most errors. Force decisions in those zones.

Recent Games

Briem, Benedikt2244

TCh-ISL Kvika 2025-26 · 8 Mar 2026

0-1

Domalchuk-Jonasson, Aleksandr2362

Icelandic team chess cham... · 7 Mar 2026

½-½

Stremavicius, Titas2547

Icelandic team chess cham... · 6 Mar 2026

½-½

Petrov,N2572

TCh-ISL Kvika 2025-26 · 5 Mar 2026

1-0

Petrov, Nikita2555

Icelandic team chess cham... · 5 Mar 2026

1-0

Mitusov, Semen2482

TCh-NOR Elite 2025-26 · 8 Feb 2026

½-½

Openings

Based on player games

Weaknesses

EXPLOIT!

White

English: Symmetrical

62.5%

8 GamesLow sample·Loses

1.c4 c5 2.Nc3 g6

Italian: Giuoco Piano

56.3%

16 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Black

Sicilian: 2...Nc6

66.7%

9 GamesLow sample·Loses

1.e4 c5 2.Nf3 Nc6

Strengths

AVOID

White

Italian: Two Knights

76.9%

13 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

English: g3 System

61.5%

13 Games·Wins

1.c4 e5 2.g3 Nf6

Black

Reti: Double Fianchetto

76.5%

17 Games·Wins

1.Nf3 Nf6 2.g3 b5

Sicilian: e6 Systems

47.9%

71 Games·Wins

1.e4 c5 2.Nf3 e6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#65Qc5??

Endgame

vs Safarli

OTB·2025

▶

#43Qxf6??

Endgame

vs Unzicker

OTB·2025

▶

#38Rh8??

Tactics

vs Van der Werf

OTB·2025

▶

#24Nb6??

Tactics

vs Bazakutsa

OTB·2024

▶

#31Kf7??

Tactics

vs Godena

OTB·2024

▶

#39Rxh4+??

Tactics

vs Bisby

OTB·2024

▶

#31Qh8+??

Tactics

vs Ptacnikova

OTB·2024

▶

#32Qd6??

Tactics

vs Mamedov

Blitz·2023

▶

#52Nf6??

Endgame

vs Makovec

Blitz·2023

▶

#37b2??

Tactics

vs Hrvacic

Blitz·2023

Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

2026

2025

2024

2023

2022

2021

PRO

Starting Position

1383 Games

46%28%26%

Move	Games	%
1.e4	589	61%
1.d4	385	59%
1.c4	273	62%
1.Nf3	136	62%

1.e4

61%

589

1.d4

59%

385

1.c4

62%

273

1.Nf3

62%

136

Hjartarson, Johann

Play against Hjartarson, Johann's Twin

Statistics

Play Style

Deep Analysis

Clutch Factor

Problematic Pieces

Critical Moment

Error Heatmap

Recent Games

Openings

Weaknesses

English: Symmetrical

Italian: Giuoco Piano

Sicilian: 2...Nc6

Strengths

Italian: Two Knights

English: g3 System

Reti: Double Fianchetto

Sicilian: e6 Systems

Critical Blunders