H
GM
Hertneck, Gerald
GER·Born 1963·FIDE #4600088·1,588 Games
GER Classical24281,557 Games
Rapid24709 Games
Blitz246122 Games
Play against Hertneck, Gerald's Twin
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1588 games analyzed
Statistics
Total
1588Wins
661Draws
610Losses
31642%38%20%
Play Style
What you need to know before facing themElite accuracy: 93.8% average
Solid conversion: 93%
Very consistent (93%)
Very precise: only 0.0 blunders/game
Dominates 1.b3 ♔ (75% in 14 games)
Deep Analysis
Stockfish 18 · Classical games · 111 analyzedAccuracy by phase
Opening
96.2%
Middlegame
93.9%
Endgame
95.8%
Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?
+3%Winning (+2 or more)
94%44g
Equal position
95%41g
Losing (-2 or more)
91%26g
Performance under pressure
Problematic Pieces — Which pieces cause most errors?
26%
24 errors
22%
20 errors
16%
15 errors
14%
13 errors
13%
12 errors
8%
7 errors
Critical Moment — When does the first serious error occur?
Move 39 average0%
0%
0%
100%
0%
1-15
16-25
26-35
36-45
46+
100% of blunders occur between move 36-45. Keep tension until that moment.
Error Heatmap — Where do most errors occur?
5
5
5
5
4
FewMany
Errors mapped
39
Hotspot zone
c5 / e5
Critical squares
c5
5 err
e5
5 err
e8
5 err
f5
5 err
g4
4 err
c5/e5 concentrate most errors. Force decisions in those zones.
Openings
Based on player gamesWeaknesses
— exploit these linesNo significant weaknesses detected as White
Black60.0%Loses
Slav: Semi-Slav — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3
15 Games · last played 4 months agoPlay this line
Strengths
— avoid these linesWhite59.3%Wins
King's Indian: Main Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O27 Games · last played 4 years ago
White55.0%Wins
King's Indian: Classical — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e520 Games · last played 10 years ago
Black45.8%Wins
French: Advance — 1.e4 e6 2.d4 d5 3.e524 Games · last played last year
Critical Blunders
10 errors · Stockfish#33Be2??vs EichnerOTB · 2025
#39Kf7??vs ArndtOTB · 2024
#83Qxh5+??vs BalintOTB · 2023
#36Qe8??vs LoewOTB · 2021
#24d4??vs RedziszOTB · 2021
#50Re5??vs SteinerOTB · 2019
#32Qh3??vs ChyzyOTB · 2019
#21Be8??vs BarpOTB · 2019
#42Nxf6??vs RubilOTB · 2019
#25c5??vs MorandaOTB · 2019
Recent Games
1,588 GamesD
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Safin Safarullakhan(2326)
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Schlosser, Philipp(2455)
4th Munich GM2 2026 · 18 May 2026
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Vaidyanathan, Kannan(2298)
4th Munich GM2 2026 · 17 May 2026
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Besou, Hussain(2409)
4th Munich GM2 2026 · 17 May 2026
Endgame Statistics
PRO22 endgame categories analyzedEndgame Statistics
Reveal weaknesses →
22 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
784 Games
47%38%15%
MoveGamesPerformance%
1.d4
59067%
1.c4
9764%
1.Nf3
4953%
1.e4
2962%
1.b3Strong
1475%
1.g3Strong
488%
1.d3Weak
10%