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

1,108 over-the-board games in the Chess Stalker database (1,093 classical, 15 rapid): 54% wins, 16% draws, 30% losses. FIDE rating 2453 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.

Chess Stalker

Ernesto J. Fernandez Guillen

IM

Cubaborn 1994FIDE ID 3512428

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2300
2400
2500
Peak2488
2469 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2479
2453
2349
2488peak, Sep 2025
1,108games
596wins, 54%
174draws, 16%
337losses, 30%

Play style

before facing them
Elite accuracy: 91.7% average
Solid conversion: 83%
Very consistent (88%)
Very precise: only 0.1 blunders/game
Dominates 1.Nf3 as ♔ (82% in 30 games)

Play against Fernandez Guillen's Twin

Their real openings, level & style

Based on 1,108 games

Openings

1,108 games

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 3 years ago71.4%wins

Deep analysis

Stockfish · Classical · 284 analyzed
Accuracy by phase
Opening
95.7%
Middlegame
92.3%
Endgame
94.6%
Clutch factor
+4%
Winning (+2)
93%
Equal
94%
Losing (−2)
89%
Problematic pieces
21%
80 err
20%
74 err
19%
71 err
18%
69 err
11%
41 err
11%
40 err
Critical moment
Move 38 avg
0%
1-15
6%
16-25
48%
26-35
26%
36-45
19%
46+
48% of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squares
15
13
14
12
14
Few
Many
c6
15
g4
14
h5
14
c5
13
e4
12
c6/g4 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#35
♞d7?? vs Asensio Linan
Endgame · OTB · 2025
#56
♚e4?? vs Assylov
Endgame · OTB · 2025
#31
♜xg6+?? vs Domingo Nunez
Middlegame · OTB · 2025
#39
a7?? vs Rog
Endgame · OTB · 2025
#30
h5?? vs Movsziszian
Middlegame · OTB · 2025
#66
♚h5?? vs Gorshtein
Endgame · OTB · 2024

Recent games

Lorente Melcon, Maximo(2205)

MyInvestor Casablanca IM · 6 Sept 2026

½–½
Pichon, Ewen(2333)

MyInvestor Casablanca IM · 6 Sept 2026

1–0
Perez Marimon, Jorge De Jesus(2412)

MyInvestor Casablanca IM · 5 Sept 2026

½–½
Bogdanov,Egor(2496)

7th San Cristobal Open · 29 Aug 2026

½–½
Meshkovs, Nikita(2545)

7th San Cristobal Open · 28 Aug 2026

1–0
Sanchez Gonzalez, Diego 2012(2127)

7th San Cristobal Open · 27 Aug 2026

1–0

Endgame statistics

Repertoire

PRO
1,108 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
550 games57%W16%D27%L
Move
1. e4
5151w
56%1628%
64%
1. ♞f3
302w
73%17
82%
1. d4
44y
25%25%50%
38%
1. g3
115y
100%
100%

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