H
GM

Halkias, Stelios

GRE GRE·Born 1980·FIDE #4201809·3,323 Games

Classical24982,991 Games
Rapid2457166 Games
Blitz2465188 Games

Play against Halkias, Stelios's Twin

PRO

Uses their openings, level & style

Statistics

Total

3323

Wins

1576

Draws

986

Losses

760
47%30%23%

Play Style

What you need to know before facing them
Elite accuracy: 93.2% average
Solid conversion: 84%
Very consistent (86%)
Very precise: only 0.1 blunders/game
Dominates 1.c4 ♔ (75% in 100 games)

Deep Analysis

Stockfish 18 · Classical games · 272 analyzed
Accuracy by phase
Opening
96.3%
Middlegame
93.1%
Endgame
94.5%
Clutch Factor
+5%
Winning (+2 or more)
94%107g
Equal position
94%109g
Losing (-2 or more)
89%56g
Performance under pressure
Problematic Pieces — Which pieces cause most errors?
23%
56 errors
21%
52 errors
19%
46 errors
15%
37 errors
13%
32 errors
10%
25 errors
Critical Moment — When does the first serious error occur?
Move 40 average
5%
5%
36%
27%
27%
1-15
16-25
26-35
36-45
46+
36% of blunders occur between move 26-35. Keep tension until that moment.
Error Heatmap — Where do most errors occur?
12
14
14
Few
Many
Critical squares
e4
14 err
e5
14 err
e6
12 err
c5
10 err
g4
10 err
e4/e5 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

No significant weaknesses detected as White

Black62.5%Loses
Italian: Fried Liver — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5
8 Games · Low sample · last played 4 years agoPlay this line
Black53.8%Loses
Caro-Kann: Exchange — 1.e4 c6 2.d4 d5 3.exd5
13 Games · last played 3 years agoPlay this line

Strengths

— avoid these lines
White68.0%Wins
King's Indian: Main Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O50 Games · last played 3 months ago
White67.4%Wins
King's Indian: Classical — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e543 Games · last played 3 months ago
Black72.7%Wins
Catalan — 1.d4 Nf6 2.c4 e6 3.g311 Games · last played last year
Black70.0%Wins
London System — 1.d4 Nf6 2.Bf4 d510 Games

Critical Blunders

10 errors · Stockfish
Bd2??vs MekhitarianOTB · 2026
Bf6??vs MartirosyanOTB · 2026
Bc5??vs MendoncaOTB · 2026
Rxb7??vs IndjicOTB · 2026
Rb4??vs MoroniOTB · 2026
Ke3??vs AltiniBlitz · 2025
Rbc1+??vs SuleymenovBlitz · 2025
e3??vs Praggnanandhaa RBlitz · 2025
Re8??vs WojtaszekBlitz · 2025
Kf4??vs AnsatRapid · 2025

Recent Games

W
Zierk, Steven(2489)

Titled Tue 16th Jun 2026 · 16 Jun 2026

1-0
W
Banzea, Alexandru-Bogdan(2394)

Titled Tue 16th Jun 2026 · 16 Jun 2026

0-1
W
Vlassov, Nikolai(2322)

Titled Tue 16th Jun 2026 · 16 Jun 2026

1-0
W
Brunner, Nicolas(2409)

Titled Tue 16th Jun 2026 · 16 Jun 2026

1-0
W
Mekhitarian, Krikor Sevag(2544)

Titled Tue 16th Jun 2026 · 16 Jun 2026

1-0
L
Nakamura, Hikaru(2792)

Titled Tue 16th Jun 2026 · 16 Jun 2026

1-0

Endgame Statistics

PRO23 endgame categories analyzed
Endgame Statistics
Reveal weaknesses →
Repertoire
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Move arrowsmost-played moves
Stockfish
1672 Games
53%29%18%
MoveGamesPerformance%
1.Nf3
760
66%
1.d4
737
69%
1.c4Strong
100
75%
1.e4
74
57%
1.b3
1
50%

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