IM
Nemec, Jachym
CZE·Born 2008·FIDE #23716525·758 Games
CZE Classical2477658 Games
Rapid238056 Games
Blitz235444 Games
Statistics
758
Total
319
Wins
189
Draws
250
Losses
42%25%33%
Play Style
What you need to know before facing them
Elite accuracy: 92.6% average
Solid conversion: 81%
Very consistent (91%)
Very precise: only 0.0 blunders/game
Dominates 1.Nf3 ♔ (68% in 73 games)
Vulnerable to 1.Nf3 ♚ (only 40%)
Deep Analysis
Stockfish 18 · Classical games · 416 analyzed
Accuracy by phase
Opening96.5%
Middlegame92.8%
Endgame94.0%
Clutch Factor
Performance under pressure
Winning (+2 or more)94%
177 Games
Equal position94%
125 Games
Losing (-2 or more)90%
114 Games
Problematic Pieces
Which pieces cause most errors?
♖
22%
96 errors
♞
20%
86 errors
♕
19%
82 errors
♗
16%
68 errors
♙
14%
61 errors
♔
9%
41 errors
Critical Moment
When does the first serious error occur?
Move 42average
1-15
16-25
26-35
36-45
46+
33% of blunders occur between move 26-35. Keep tension until that moment.
Error Heatmap
Where do most errors occur?
11
13
11
11
10
11
12
13
10
11
abcdefgh
Many
Few
Critical squares
d513 err
e313 err
d312 err
c411 err
e211 err
d5/e3 concentrate most errors. Force decisions in those zones.
Recent Games
W
Stocek, Jiri2500
ch-CZE 2026 · 16 May 2026
D
Zilka, Stepan2516
ch-CZE 2026 · 15 May 2026
D
Hrbek, Stepan2466
ch-CZE 2026 · 14 May 2026
W
Kriebel, Tadeas2524
ch-CZE 2026 · 13 May 2026
D
Navara, David2624
ch-CZE 2026 · 12 May 2026
L
Finek, Vaclav2573
ch-CZE 2026 · 11 May 2026
Openings
Based on player games
Weaknesses
EXPLOIT!White
Nimzo-Indian: Capablanca
83.3%12 Games·Loses
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3
Black
Grünfeld
60.0%10 Games·Loses
1.d4 Nf6 2.c4 g6 3.Nc3 d5
Slav Defense
57.1%21 Games·Loses
1.d4 d5 2.c4 c6
Strengths
AVOIDWhite
Sicilian: d6 Systems
63.6%11 Games·Wins
1.e4 c5 2.Nf3 d6
Reti: KIA
60.0%15 Games·Wins
1.Nf3 d5 2.g3 Nf6
Black
Sicilian: d6 Systems
46.2%39 Games·Wins
1.e4 c5 2.Nf3 d6
Critical Blunders
Tactical errors analyzed with Stockfish
10 errors
▶
#34Be3??
Tactics
vs Havelka
OTB·2025
▶
#46Nf3??
Endgame
vs Krzyzanowski
OTB·2025
▶
#39Rg5??
Tactics
vs Kusa
Rapid·2025
▶
#30Re8??
Tactics
vs Lihotsky
Rapid·2025
▶
#47Bxa5??
Endgame
vs Trhal
Rapid·2025
▶
#28Kc4??
Tactics
vs Krejci
OTB·2025
▶
#38g3??
Endgame
vs Dotzer
OTB·2025
▶
#32Qb7??
Tactics
vs Stevik
OTB·2025
▶
#25Qh5??
Tactics
vs Costa
OTB·2025
▶
#51Bb1??
Endgame
vs Valiyev
OTB·2025
Endgame Statistics
23 endgame categories analyzed — discover where they collapse under pressure
Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO2026
2025
2024
2023
2022
2021
PRO
8
76
5
4
3
2
1a
b
c
d
efgh384 Games
46%28%26%
1.d4
58%268
1.Nf3
68%73
1.e4
50%27
1.c4
61%9
1.b3
64%7