L
GM

Lomasov, Semyon

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

Classical2551738 Games
Rapid255070 Games
Blitz248530 Games

Play against Lomasov, Semyon's Twin

PRO

Uses their openings, level & style

Statistics

Total

812

Wins

331

Draws

301

Losses

180
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
Opening
96.8%
Middlegame
93.3%
Endgame
95.2%
Clutch Factor
+6%
Winning (+2 or more)
95%70g
Equal position
95%77g
Losing (-2 or more)
89%41g
Performance under pressure
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 40 average
0%
8%
50%
8%
33%
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?
5
5
6
6
6
Few
Many
Critical squares
b1
6 err
d3
6 err
e3
6 err
c4
5 err
g5
5 err
b1/d3 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

No significant weaknesses detected as White

No significant weaknesses detected as Black

Strengths

— avoid these lines
White61.8%Wins
Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e634 Games · last played 2 years ago
White62.5%Wins
French: Classical — 1.e4 e6 2.d4 d5 3.Nc3 Nf616 Games · last played 2 years ago
Black50.0%Wins
French: Classical — 1.e4 e6 2.d4 d5 3.Nc3 Nf624 Games · last played 2 years ago

Critical Blunders

10 errors · Stockfish
Rf1+??vs AravindhBlitz · 2024
Rb5??vs SvaneBlitz · 2024
Rf8??vs VokhidovBlitz · 2024
Nd2??vs RisteskiBlitz · 2024
Nxe3??vs BokBlitz · 2024
Rb3??vs MadaminovBlitz · 2024
Kf5??vs BortnykBlitz · 2024
g5??vs DubovBlitz · 2024
Nb4??vs LodiciBlitz · 2024
Re7??vs MamedyarovBlitz · 2024

Recent Games

L
Ai, Evan(2170)

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

0-1
L
Ai, Evan(2170)

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

0-1
D
Macovei, Andrei(2481)

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

½-½
W
Liang, Awonder(2687)

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

0-1
D
De Silva, L M S T(2370)

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

½-½
W
Lin, Dachey(2303)

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

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
410 Games
48%33%19%
MoveGamesPerformance%
1.e4
356
65%
1.d4
46
69%
1.Nf3
6
42%
1.b3Strong
1
100%
1.c4
1
50%

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