GM

Zierk, Steven

USA USA·Born 1993·FIDE #2034255·1,465 Games

Classical24891,452 Games
Rapid250011 Games
Blitz24882 Games

Statistics

1465

Total

848

Wins

256

Draws

361

Losses

58%17%25%

Play Style

What you need to know before facing them

Elite accuracy: 92.3% average
Plays 3.1% better with black
High resilience (58%): Dangerous even when losing
Solid conversion: 88%
Very precise: only 0.1 blunders/game
Dominates 1.c4 ♔ (88% in 12 games)

Deep Analysis

Stockfish 18 · Classical games · 130 analyzed

Accuracy by phase
Opening96.3%
Middlegame93.4%
Endgame95.3%

Clutch Factor

Performance under pressure

+5%
Winning (+2 or more)93%
54 Games
Equal position95%
44 Games
Losing (-2 or more)88%
32 Games

Problematic Pieces

Which pieces cause most errors?

♖
23%
32 errors
♕
21%
30 errors
♙
18%
25 errors
♞
17%
24 errors
♗
13%
18 errors
♔
9%
12 errors

Critical Moment

When does the first serious error occur?

Move 39average
1-15
16-25
26-35
36-45
46+
30% of blunders occur between move 36-45. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

5
5
5
6
4
5
4
4
4
4
abcdefgh
Many
Few
Critical squares
e46 err
b35 err
c45 err
d45 err
d55 err
e4/b3 concentrate most errors. Force decisions in those zones.

Recent Games

D
Teterev, Vitaly2239

Titled Tue 19th May 2026 · 19 May 2026

½-½
L
Sathvik Adiga2400

Titled Tue 19th May 2026 · 19 May 2026

1-0
W
Skliarov, Viktor2325

Titled Tue 19th May 2026 · 19 May 2026

0-1
W
von Estorff, Jacob2220

Titled Tue 19th May 2026 · 19 May 2026

0-1
W
Williams, Simon K2455

Titled Tue 19th May 2026 · 19 May 2026

1-0
W
Derr, Oleg2194

Titled Tue 19th May 2026 · 19 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!
White
Ruy Lopez: Berlin
62.5%
8 GamesLow sample·Loses

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6

Black

No significant weaknesses detected as Black

Strengths

AVOID
White
Caro-Kann: Exchange
75.6%
45 Games·Wins

1.e4 c6 2.d4 d5 3.exd5

Sicilian: d6 Systems
58.3%
127 Games·Wins

1.e4 c5 2.Nf3 d6

Black
French: Exchange
68.2%
22 Games·Wins

1.e4 e6 2.d4 d5 3.exd5

Sicilian: d6 Systems
61.3%
31 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#39Qc5??
Tactics
vs Stearman
OTB·2024
▶
#28Kg2??
Tactics
vs Koustav Chatterjee
OTB·2023
▶
#75Qg3+??
Endgame
vs Burke
OTB·2023
▶
#39Qc7??
Tactics
vs Sawlin
Blitz·2020
▶
#53Ra5??
Endgame
vs Matlakov
OTB·2020
▶
#38Qg4??
Tactics
vs Postny
OTB·2020
▶
#20Rxd7??
Tactics
vs Jobava
OTB·2020
▶
#24Kh2??
Tactics
vs Fier
OTB·2020
▶
#40Kc7??
Endgame
vs Dominguez Perez
OTB·2020
▶
#36Ne4??
Tactics
vs Le
OTB·2020
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
745 Games
63%15%22%
1.e4
68%
621
1.d4
79%
46
1.b3
82%
38
1.Nf3
79%
28
1.c4
88%
12
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