Scouting report: Ernesto J. Fernandez Guillen (IM, CUB)

1,114 over-the-board games in the Chess Stalker database (437 classical, 27 rapid, 650 blitz): 54% wins, 16% draws, 30% losses. FIDE rating 2458 standard, 2479 rapid, 2349 blitz. 284 games analyzed with Stockfish: 92% accuracy, 0.13 blunders per game.

  • Opening repertoire of Ernesto J. Fernandez Guillen as White and Black, with results per line — free.
  • Weaknesses and blunder patterns, evaluated with Stockfish — free.
  • Recent over-the-board games and endgame statistics.
  • Twin Bot: a sparring bot that imitates Ernesto J. Fernandez Guillen's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/3512428 — no account needed.

Ernesto J. Fernandez Guillen

TitleInternational MasterFederationCubaBorn1994FIDE ID3512428

Classical2458▲ 5
Rapid2479
Blitz2349
Games1,114
W · D · L54 / 16 / 30
Peak2488

Rating history

2300
2400
Peak2488
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Oct 2023Nov 2026
Classical2458Rapid2479Blitz2349no games played
Accuracy by phase
95.7%Opening92.3%Middlegame94.6%Endgame
Clutch factor
Insufficient data

Play style

Elite accuracy: 91.7% average
Solid conversion: 85%
Very consistent (88%)
Very precise: only 0.1 blunders/game
Dominates 1.Nf3 as ♔ (82% in 31 games)

Recent games

Krauchi Romero, Martin(2413)

MyInvestor Casablanca · IM · 12 Sept 2026

½–½
Fuentes Guinot, Alejandro(2305)

MyInvestor Casablanca · IM · 11 Sept 2026

½–½
Atares Buisan, Sergio(2338)

MyInvestor Casablanca · IM · 10 Sept 2026

1–0
Llorente Zaro, Alfonso(2439)

MyInvestor Casablanca · IM · 9 Sept 2026

½–½
Escartin Lacasa, Jose(2278)

MyInvestor Casablanca · IM · 8 Sept 2026

1–0

Play against Fernandez Guillen's Twin

Their real openings, level & style

Based on 1,114 games

Openings

553 games as White · scores 64.7%

Weaknesses

where they slip as ♔ White

No significant weaknesses detected as white

Strengths

what holds up for them as ♔ White
Sicilian: e6 Systems1.e4 c5 2.♞f3 e653 games, last played last year69.8%wins
French: Tarrasch1.e4 e6 2.d4 d5 3.♞d214 games, last played 4 years ago71.4%wins

By family

open a family to see its lines
PRO
1,114 games in scope
LineGamesScorevs 64.7%
19964.3%—
8555.3%−9.4 pts
7367.8%+3.1 pts
6373.0%+8.3 pts
3282.8%+18.1 pts
2661.5%−3.2 pts
2464.6%—
1457.1%—

Mistakes

Problematic pieces
Insufficient data
Critical moment
Insufficient data
Error heatmap · Critical squares
Insufficient data

Critical blunders

Tactical errors analyzed with Stockfish

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Endgame statistics

Repertoire

PRO
1,114 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
553 games57%W16%D27%L
Move
1. e4
5176w
56%1628%
64%
1. ♞f3
316w
74%16
82%
1. d4
44y
25%25%50%
38%
1. g3
115y
100%
100%

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