Efimenko, Zahar

UKR UKR·Born 1985·FIDE #14107201·2,268 Games

FIDE OTB · #14107201 · 2,268 Games

Classical25482,123 g Games

Rapid260776 g Games

Blitz254669 g Games

Play against Efimenko's Twin

PRO

Uses their openings, level & style

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

Ready to play

2268 games analyzed

Statistics

Total

2268

Wins

870

Draws

1051

Losses

347

38%46%15%

Play Style

before facing themWhat you need to know before facing them

Elite accuracy: 94.0% average

Very consistent (90%)

Very precise: only 0.1 blunders/game

Dominates 1.d4 ♔ (73% in 46 games)

Deep Analysis

Stockfish 18 · Classical games · 246 analyzed

Accuracy by phase

Opening

96.1%

Middlegame

93.8%

Endgame

95.7%

Clutch Factor

+5%

Winning (+2)Winning (+2)

95%56g

EqualEqual position

96%138g

Losing (−2)Losing (−2)

89%52g

Accuracy under pressure

Problematic Pieces — which cause most errors?

23%

39 err

19%

32 err

18%

30 err

16%

28 err

15%

26 err

16 err

Critical Moment

Move 39 avg

1-15

16-25

60%

26-35

20%

36-45

20%

46+

60% 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?

Few

Many

Errors mapped

Hotspot zone

e5 / f5

Critical squares

11 err

8 err

5 err

e5/f5 account for most of the errors. Force decisions in those zones.

Openings

2,268 GamesBased on 2,268 player games

Weaknesses

— exploit these— exploit these lines

No significant weaknesses detected as white

No significant weaknesses detected as black

Strengths

— avoid these— avoid these lines

aswhite65.2%Wins

Sicilian: Dragon — 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g623 Games · last played 12 years ago

23 Games · last played 12 years ago

aswhite57.9%Wins

French: Classical — 1.e4 e6 2.d4 d5 3.Nc3 Nf619 Games · last played 17 years ago

19 Games · last played 17 years ago

asblack62.5%Wins

Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e616 Games · last played 2 years ago

16 Games · last played 2 years ago

asblack53.3%Wins

King's Indian: Main Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O15 Games · last played 19 years ago

15 Games · last played 19 years ago

Critical Blunders

10 errors · Stockfish

#60Kg3??Endgamevs MaghsoodlooOTB · 2024

#27Nxe4+??Tacticsvs SchneiderOTB · 2024

#64Nd8??Endgamevs SamunenkovBlitz · 2021

#54Kf6??Endgamevs KlekowskiBlitz · 2021

#34Qc7??Tacticsvs KosakowskiBlitz · 2021

#34Kh1??Tacticsvs Gukesh DBlitz · 2021

#59Rc5??Endgamevs GumularzBlitz · 2021

#30Qh3??Tacticsvs DubovRapid · 2021

#24gxf5??Tacticsvs BognerOTB · 2021

#67Kc6??Endgamevs BluebaumOTB · 2020

Recent Games

2,268 Games

Loss

Baum, Jonasz(2446)

Bundesliga 2025-26 · 26 Apr 2026

1-0

Draw

Druska, Juraj(2457)

Bundesliga 2025-26 · 25 Apr 2026

½-½

Draw

Predojevic, Borki(2565)

Bundesliga 2025-26 · 24 Apr 2026

½-½

Draw

Janik, Igor(2517)

German Bundesliga 2025-26 · 22 Mar 2026

½-½

Draw

Lampert, Jonas(2536)

1. BL Pauli · 21 Mar 2026

½-½

Draw

Kryvoruchko, Yuriy(2616)

1. BL Bremen · 1 Mar 2026

½-½

Endgame Statistics

PRO157 endgames (54.7%)

Strongest

Weakest

Opposite Bishops + Major Pieces

Reaches Endgame

54.7%

157 / 287

B vs N Pref

50% · 40%

6 / 5

PiecesTypeWin %Games

Rook + Minor

21.6%88

Rook vs Rook

12.5%48

Rook+Bishop vs Rook+Knight

21.7%46

Rook + Equal Minors

24.4%41

Queen vs Pieces

36%25

Rook vs Minor (Exchange)

35%20

Rook + Minor21.6%88

Rook vs Rook12.5%48

Rook+Bishop vs Rook+Knight21.7%46

Rook + Equal Minors24.4%41

Queen vs Pieces36%25

Rook vs Minor (Exchange)35%20

Weakest: Opposite Bishops + Major Pieces 0%Show all 23 types

Unlock Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

1156 Games

43%45%12%

Move	Games	%
1.e4	852	66%
1.Nf3	249	63%
1.d4Strong	46	73%
1.c4	9	67%

MoveGamesPerformance%

1.e4

852

66%

1.Nf3

249

63%

1.d4Strong

73%

1.c4

67%