Fernandez Guillen, Ernesto J.

CUB CUB·Born 1994·FIDE #3512428·1,158 Games

Classical24391,141 Games

Rapid247917 Games

Blitz23490 Games

Play against Fernandez Guillen, Ernesto J.'s Twin

PRO

Uses their openings, level & style

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

Ready to play

1158 games analyzed

Statistics

Total

1158

Wins

612

Draws

181

Losses

363

53%16%31%

Play Style

What you need to know before facing them

Elite accuracy: 91.7% average

High resilience (58%): Dangerous even when losing

Solid conversion: 91%

Very consistent (88%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (81% in 37 games)

Deep Analysis

Stockfish 18 · Classical games · 284 analyzed

Accuracy by phase

Opening

95.7%

Middlegame

92.3%

Endgame

94.6%

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

+4%

Winning (+2 or more)

93%138g

Equal position

94%57g

Losing (-2 or more)

89%89g

Performance under pressure

Problematic Pieces — Which pieces cause most errors?

21%

80 errors

20%

74 errors

19%

71 errors

18%

69 errors

11%

41 errors

11%

40 errors

Critical Moment — When does the first serious error occur?

Move 38 average

48%

26%

19%

1-15

16-25

26-35

36-45

46+

48% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap — Where do most errors occur?

Few

Many

Errors mapped

118

Hotspot zone

c6 / g4

Critical squares

15 err

14 err

13 err

12 err

c6/g4 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

White46.2%Loses

Italian: Two Knights — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

13 Games · last played 4 months agoPlay this line

Black57.1%Loses

Sicilian: Open — 1.e4 c5 2.Nf3 d6 3.d4

14 Games · last played 6 months agoPlay this line

Black55.6%Loses

Ruy Lopez: Morphy — 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

9 Games · Low sample · last played 4 months agoPlay this line

Strengths

— avoid these lines

White70.9%Wins

Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e655 Games · last played 12 months ago

White71.4%Wins

French: Tarrasch — 1.e4 e6 2.d4 d5 3.Nd214 Games

Black71.9%Wins

Ruy Lopez: Schliemann — 1.e4 e5 2.Nf3 Nc6 3.Bb5 f564 Games

Black67.6%Wins

Scotch Game — 1.e4 e5 2.Nf3 Nc6 3.d434 Games

Critical Blunders

10 errors · Stockfish

#35Nd7??Tacticsvs Asensio LinanOTB · 2025

#56Ke4??Endgamevs AssylovOTB · 2025

#31Rxg6+??Tacticsvs Domingo NunezOTB · 2025

#39a7??Endgamevs RogOTB · 2025

#30h5??Tacticsvs MovsziszianOTB · 2025

#66Kh5??Endgamevs GorshteinOTB · 2024

#44Qc1+??Endgamevs YuffaOTB · 2024

#33Ra7??Tacticsvs OroOTB · 2024

#40Ne4??Tacticsvs BluebaumOTB · 2024

#57Rxh2??Endgamevs JacobsonOTB · 2023

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Endgame Statistics

PRO23 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

570 Games

56%17%27%

Move	Games	%
1.e4	528	63%
1.Nf3 Strong	37	81%
1.d4	4	38%
1.g3 Strong	1	100%

MoveGamesPerformance%

1.e4

528

63%

1.Nf3Strong

81%

1.d4

38%

1.g3Strong

100%