Zierk, Steven

USA USA·Born 1993·FIDE #2034255

2489Classical

2517Rapid

2459Blitz

Statistics

Total1,713

Wins997

Draws284

Losses432

58%17%25%

Play Style

before facing themWhat you need to know before facing them

Elite accuracy: 92.6% average

Solid conversion: 81%

Very consistent (84%)

Very precise: only 0.2 blunders/game

Dominates 1.c4 as

(88% in 12 games)

Play against Zierk's Twin

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

1,713 games analyzed

Deep Analysis

Stockfish 18 · Classical · 202 analyzedStockfish 18 · Classical games · 202 analyzed

Accuracy by phase

Opening

96.4%

Middlegame

92.8%

Endgame

94.9%

Clutch Factor

+3%

Winning (+2)Winning (+2)

94%76g

EqualEqual position

95%48g

Losing (−2)Losing (−2)

91%78g

Accuracy under pressure

Problematic Pieces — which cause most errors?

23%

68 err

20%

57 err

18%

53 err

15%

44 err

14%

40 err

10%

28 err

Critical Moment

Move 39 avg

1-15

22%

16-25

19%

26-35

26%

36-45

33%

46+

33% of blunders occur after move 46 — keep tension until then.of blunders occur after move 46 — keep tension until then.

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

Hotspot zone

d5 / d4

Critical squares

14 err

12 err

11 err

10 err

9 err

d5/d4 concentrate most errors. Force decisions in those zones.

Openings

1,713 gamesBased on 1,713 player games

Weaknesses

— exploit these— exploit these lines

aswhite50.0%losses

Ruy Lopez: Berlin — 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6

10 games · last played 2 weeks agoPlay this line

aswhite41.7%losses

Petroff Defense — 1.e4 e5 2.Nf3 Nf6

12 games · last played last monthPlay this line

No significant weaknesses detected as black

Strengths

— avoid these— avoid these lines

aswhite75.6%wins

Caro-Kann: Exchange — 1.e4 c6 2.d4 d5 3.exd545 g45 games · last played 2 years ago

aswhite60.0%wins

Sicilian: d6 Systems — 1.e4 c5 2.Nf3 d6145 g145 games · last played 2 weeks ago

asblack59.4%wins

Queen's Gambit Accepted — 1.d4 d5 2.c4 dxc496 g96 games · last played 2 months ago

asblack63.0%wins

French: Exchange — 1.e4 e6 2.d4 d5 3.exd527 g27 games · last played 2 months ago

Critical Blunders

10 errors · Stockfish

#16Bf4??Tacticsvs BluebaumOTB · 2026

#50Rg4??Endgamevs Pranesh MOTB · 2026

#17Nf5??Tacticsvs IndjicOTB · 2026

#36Bxe3??Endgamevs TabatabaeiOTB · 2026

#51Bf6??Endgamevs Martinez AlcantaraOTB · 2026

#17Bxc2??Tacticsvs MovahedOTB · 2026

#58hxg4??Endgamevs SaranaOTB · 2026

#89Qd4+??Endgamevs SvaneOTB · 2026

#29Rd1??Tacticsvs ParavyanOTB · 2026

#70Kc6??Endgamevs SaranaOTB · 2026

Recent Games

1,713 games

Loss

Oberoi, Shelev(2172)

3rd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Win

Lai, Duc Minh(2131)

3rd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Loss

Rustemov, Alexander(2525)

3rd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Win

Al-Tarboush, Ward(2243)

3rd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Win

Rustemov, Alexander(2525)

2nd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Win

Dubnevych, Maksym(2350)

2nd 3-0 Thu 30th Jul 2026 · 30 Jul 2026

0-1

Endgame Statistics

PRO127 endgames (62%) · avoid Bishop vs Knight (12%)

Strongest

79.4%

R+Bishop vs R+Knight

Weakest

60.6%

Pure Pawn

Reaches Endgame

62%

127 / 205

B vs N Pref

52.4%·47.8%

prefers the bishop

PiecesTypeWin %games

Rook + Equal Minors

77.9%353

R+Bishop vs R+Knight

79.4%306

Rook vs Minor (Exchange)

73.7%281

Rook vs Rook

72.6%252

Rook vs Two Minors

78.1%160

Pure Pawn

60.6%109

Rook + Equal Minors77.9%353

R+Bishop vs R+Knight79.4%306

Rook vs Minor (Exchange)73.7%281

Rook vs Rook72.6%252

Rook vs Two Minors78.1%160

Pure Pawn60.6%109

Weak in Bishop vs Knight: only 12% win rate (8 games) — Force thisShow all 14 types

Unlock Endgame Statistics

14 endgame categories — discover where they collapse under pressure

Repertoire

PRO

Move arrowsmost-played moves

Starting Position

SF18

873 games

62%15%23%

Move	games	%
1.e4	749	68%
1.d4Strong	46	79%
1.b3Strong	38	82%
1.Nf3Strong	28	79%
1.c4Strong	12	88%

MovegamesPerf%

1.e4

749

68%

1.d4Strong

79%

1.b3Strong

82%

1.Nf3Strong

79%

1.c4Strong

88%