GM

Hertneck, Gerald

GER GER·Born 1963·FIDE #4600088·1,578 Games

Classical24331,547 Games
Rapid24709 Games
Blitz246122 Games

Statistics

1578

Total

660

Wins

601

Draws

316

Losses

42%38%20%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average
Solid conversion: 96%
Very consistent (93%)
Very precise: only 0.0 blunders/game
Dominates 1.b3 ♔ (75% in 14 games)

Deep Analysis

Stockfish 18 · Classical games · 110 analyzed

Accuracy by phase
Opening96.1%
Middlegame93.8%
Endgame95.9%

Clutch Factor

Performance under pressure

+3%
Winning (+2 or more)94%
44 Games
Equal position95%
40 Games
Losing (-2 or more)91%
26 Games

Problematic Pieces

Which pieces cause most errors?

♙
27%
24 errors
♕
22%
20 errors
♖
17%
15 errors
♗
14%
13 errors
♔
12%
11 errors
♞
8%
7 errors

Critical Moment

When does the first serious error occur?

Move 39average
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
3
3
4
3
3
3
abcdefgh
Many
Few
Critical squares
c55 err
e55 err
e85 err
f55 err
g44 err
c5/e5 concentrate most errors. Force decisions in those zones.

Recent Games

D
Wong, Gengchun2227

German Bundesliga 2025-26 · 22 Mar 2026

½-½
W
Winterberg, Lukas2421

SBL München · 1 Mar 2026

1-0
W
Sawatzki, Frank2336

1. BL Pauli · 8 Feb 2026

1-0
L
Heinemann, Thies2403

1. BL Pauli · 7 Feb 2026

1-0
D
Miljkovic, Miroslav D2413

German Bundesliga 2025-26 · 11 Jan 2026

½-½
W
Kurmann, Oliver2413

German Bundesliga 2025-26 · 10 Jan 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!
White

No significant weaknesses detected as White

Black
Slav: Semi-Slav
60.0%
15 Games·Loses

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Strengths

AVOID
White
King's Indian: Main Line
59.3%
27 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O

King's Indian: Classical
55.0%
20 Games·Wins

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5

Black
French: Advance
45.8%
24 Games·Wins

1.e4 e6 2.d4 d5 3.e5

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#33Be2??
Tactics
vs Eichner
OTB·2025
▶
#39Kf7??
Tactics
vs Arndt
OTB·2024
▶
#83Qxh5+??
Endgame
vs Balint
OTB·2023
▶
#36Qe8??
Tactics
vs Loew
OTB·2021
▶
#24d4??
Tactics
vs Redzisz
OTB·2021
▶
#50Re5??
Endgame
vs Steiner
OTB·2019
▶
#32Qh3??
Tactics
vs Chyzy
OTB·2019
▶
#21Be8??
Tactics
vs Barp
OTB·2019
▶
#42Nxf6??
Endgame
vs Rubil
OTB·2019
▶
#25c5??
Tactics
vs Moranda
OTB·2019
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
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
779 Games
47%37%16%
1.d4
67%
587
1.c4
64%
97
1.Nf3
53%
47
1.e4
62%
29
1.b3
75%
14
1.g3
88%
4
1.d3
0%
1
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