H
GM
Hjartarson, Johann
ISL·Born 1963·FIDE #2300044·2,815 Games
ISLFIDE OTB · #2300044 · 2,815 Games
Classical24612,578 g Games
Rapid240594 g Games
Blitz2424143 g Games
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2815 games analyzed
Statistics
Total
2815Wins
1232Draws
810Losses
77244%29%27%
Play Style
before facing themWhat you need to know before facing themElite 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 · 313 analyzedAccuracy by phase
Opening
96.6%
Middlegame
92.9%
Endgame
94.6%
Clutch Factor
+5%Winning (+2)Winning (+2)
94%105g
EqualEqual position
95%111g
Losing (−2)Losing (−2)
89%97g
Accuracy under pressure
Problematic Pieces — which cause most errors?
23%
90 err
21%
84 err
17%
65 err
15%
57 err
15%
59 err
10%
38 err
Critical Moment
Move 34 avg4%
1-15
22%
16-25
39%
26-35
26%
36-45
9%
46+
39% of blunders after move 26-35 — keep the tension until then.of blunders occur in moves 26-35. Keep the tension until that moment.
Error Heatmap — where do errors occur?
13
12
12
12
15
FewMany
Errors mapped
114
Hotspot zone
d1 / f6
Critical squares
d1
15 err
f6
13 err
d4
12 err
f4
12 err
g5
12 err
d1/f6 account for most of the errors. Force decisions in those zones.
Openings
2,815 GamesBased on 2,815 player gamesWeaknesses
— exploit these— exploit these linesaswhite62.5%Losses
English: Symmetrical — 1.c4 c5 2.Nc3 g6
8 Games · Low sample · last played 4 years agoPlay this line
aswhite56.3%Losses
Italian: Giuoco Piano — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5
16 Games · last played 5 months agoPlay this line
asblack66.7%Losses
Sicilian: 2...Nc6 — 1.e4 c5 2.Nf3 Nc6
9 Games · Low sample · last played 8 months agoPlay this line
Strengths
— avoid these— avoid these linesaswhite76.9%Wins
Italian: Two Knights — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf613 Games · last played 8 months ago
13 Games · last played 8 months ago
aswhite61.5%Wins
English: g3 System — 1.c4 e5 2.g3 Nf613 Games · last played 3 years ago
13 Games · last played 3 years ago
asblack76.5%Wins
Reti: Double Fianchetto — 1.Nf3 Nf6 2.g3 b517 Games
17 Games
asblack48.6%Wins
Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e672 Games
72 Games
Critical Blunders
10 errors · Stockfish#65Qc5??vs SafarliOTB · 2025
#43Qxf6??vs UnzickerOTB · 2025
#38Rh8??vs Van der WerfOTB · 2025
#24Nb6??vs BazakutsaOTB · 2024
#31Kf7??vs GodenaOTB · 2024
#39Rxh4+??vs BisbyOTB · 2024
#31Qh8+??vs PtacnikovaOTB · 2024
#27Qxc6??vs SafarliBlitz · 2023
#37b2??vs HrvacicBlitz · 2023
#52Nf6??vs MakovecBlitz · 2023
Recent Games
2,815 GamesWin
Mannion, Stephen R(2220)
ECU Senior +50 2026 · 10 Jun 2026
Loss
Danielsen, Henrik(2466)
ECU Senior +50 2026 · 9 Jun 2026
Loss
Degraeve, Jean-Marc(2494)
ECU Senior +50 2026 · 8 Jun 2026
Win
Berend, Fred(2208)
ECU Senior +50 2026 · 7 Jun 2026
Draw
Sielecki, Christof(2385)
ECU Senior +50 2026 · 6 Jun 2026
Win
Rahal Vives, Michael Anthony(2298)
ECU Senior +50 2026 · 5 Jun 2026
Endgame Statistics
PRO192 endgames (45.5%)Unlock Endgame Statistics
23 endgame categories analyzed — discover where they collapse under pressure
Repertoire
8
76
5
4
3
2
1a
b
c
d
efghMove arrowsmost-played moves
Stockfish
1390 Games
46%28%26%
MoveGamesPerformance%
1.e4
59261%
1.d4
38859%
1.c4
27462%
1.Nf3
13662%