GM

Lomasov, Semyon

ISR ISR·Born 2002·FIDE #24164879·812 Games

Classical2551738 Games
Rapid255070 Games
Blitz248530 Games

Statistics

812

Total

331

Wins

301

Draws

180

Losses

41%37%22%

Play Style

What you need to know before facing them

Elite accuracy: 93.6% average
Very consistent (90%)
Very precise: only 0.1 blunders/game
Dominates 1.d4 ♔ (68% in 46 games)
Vulnerable to 1.c4 ♚ (only 39%)

Deep Analysis

Stockfish 18 · Classical games · 188 analyzed

Accuracy by phase
Opening96.8%
Middlegame93.3%
Endgame95.2%

Clutch Factor

Performance under pressure

+6%
Winning (+2 or more)95%
70 Games
Equal position95%
77 Games
Losing (-2 or more)89%
41 Games

Problematic Pieces

Which pieces cause most errors?

♕
25%
37 errors
♖
21%
31 errors
♞
16%
23 errors
♙
15%
22 errors
♗
14%
20 errors
♔
10%
15 errors

Critical Moment

When does the first serious error occur?

Move 40average
1-15
16-25
26-35
36-45
46+
50% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

4
4
4
5
4
5
4
6
6
6
abcdefgh
Many
Few
Critical squares
b16 err
d36 err
e36 err
c45 err
g55 err
b1/d3 concentrate most errors. Force decisions in those zones.

Recent Games

L
Ai, Evan2170

Cornerstone New Year's Cl... · 2 Jan 2026

0-1
L
Ai, Evan2170

Round 1: Lomasov, Semyon ... · 1 Jan 2026

0-1
D
Macovei, Andrei2481

2025 Pan-Am Collegiate Ch... · 5 Jan 2025

½-½
W
Liang, Awonder2687

2025 Pan-Am Collegiate Ch... · 4 Jan 2025

0-1
D
De Silva, L M S T2370

2025 Pan-Am Collegiate Ch... · 4 Jan 2025

½-½
W
Lin, Dachey2303

2025 Pan-Am Collegiate Ch... · 3 Jan 2025

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!
White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID
White
Sicilian: e6 Systems
61.8%
34 Games·Wins

1.e4 c5 2.Nf3 e6

French: Classical
62.5%
16 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Black
French: Classical
50.0%
24 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Nf6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#65Rf1+??
Endgame
vs Aravindh
Blitz·2024
▶
#23Rb5??
Tactics
vs Svane
Blitz·2024
▶
#26Rf8??
Tactics
vs Vokhidov
Blitz·2024
▶
#23Nd2??
Tactics
vs Risteski
Blitz·2024
▶
#34Nxe3??
Tactics
vs Bok
Blitz·2024
▶
#68Rb3??
Endgame
vs Madaminov
Blitz·2024
▶
#60Kf5??
Endgame
vs Bortnyk
Blitz·2024
▶
#35g5??
Tactics
vs Dubov
Blitz·2024
▶
#23Nb4??
Tactics
vs Lodici
Blitz·2024
▶
#34Re7??
Tactics
vs Mamedyarov
Blitz·2024
Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2026
2025
2024
2023
2022
2021
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
410 Games
48%33%19%
1.e4
65%
356
1.d4
69%
46
1.Nf3
42%
6
1.b3
100%
1
1.c4
50%
1
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