S
IM
Semkov, Semko
BUL·Born 1960·FIDE #2900068·492 Games
Classical2450492 Games
Rapid—0 Games
Blitz—0 Games
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492 games analyzed
Statistics
Total
492Wins
204Draws
147Losses
14141%30%29%
Play Style
What you need to know before facing themVery high accuracy: 88.1% average
Plays 10.3% better with white
Very precise: only 0.2 blunders/game
Dominates 1.d4 ♔ (63% in 241 games)
Vulnerable to 1.Nf3 ♚ (only 33%)
Deep Analysis
Stockfish 18 · Classical games · 6 analyzedAccuracy by phase
Opening
96.2%
Middlegame
91.7%
Endgame
90.8%
Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?
+12%Winning (+2 or more)
96%2g
Equal position
97%1g
Losing (-2 or more)
83%3g
Performance under pressure
Problematic Pieces — Which pieces cause most errors?
28%
5 errors
28%
5 errors
17%
3 errors
11%
2 errors
11%
2 errors
6%
1 errors
Critical Moment — When does the first serious error occur?
Move 36 average0%
0%
50%
50%
0%
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?
2
FewMany
Errors mapped
11
Hotspot zone
c6 / c3
Critical squares
c6
2 err
c3
1 err
c7
1 err
d5
1 err
e1
1 err
c6/c3 concentrate most errors. Force decisions in those zones.
Openings
Based on player gamesWeaknesses
— exploit these linesNo significant weaknesses detected as White
Black52.9%Loses
Sicilian: 2...Nc6 — 1.e4 c5 2.Nf3 Nc6
17 Games · last played 39 years agoPlay this line
Strengths
— avoid these linesWhite61.1%Wins
Nimzo-Indian: Huebner — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c518 Games · last played 38 years ago
No consistent strengths detected as Black
Critical Blunders
2 errors · Stockfish#32g5h6??vs TalOTB
#41b4??vs TopalovOTB
Recent Games
492 GamesW
Stavrev, Nikolaj(2313)
? · 14 Dec 2003
W
Asparuhov, Parvan(2136)
? · 14 Dec 2003
L
Stoinev, Metodi(2331)
? · 13 Dec 2003
W
Kukov, Andrej(2048)
? · 13 Dec 2003
D
Kirov, Dimitar(1935)
? · 13 Dec 2003
D
Tsvetkov, Ilia(2307)
? · 12 Dec 2003
Endgame Statistics
PRO5 endgame categories analyzedEndgame Statistics
Reveal weaknesses →
5 endgame categories analyzed — discover where they collapse under pressure
Repertoire
6
5
4
3
Move arrowsmost-played moves
Stockfish
256 Games
47%30%23%
MoveGamesPerformance%
1.d4
24163%
1.e4
1136%
1.Nf3
450%
BUL