IM

Kociscak, Jiri

CZE CZE·Born 1993·FIDE #322121·886 Games

Classical2486839 Games
Rapid242710 Games
Blitz247537 Games

Statistics

886

Total

413

Wins

240

Draws

233

Losses

47%27%26%

Play Style

What you need to know before facing them

Elite accuracy: 93.7% average
Solid conversion: 81%
Very consistent (91%)
Very precise: only 0.0 blunders/game
Dominates 1.d4 ♔ (67% in 359 games)
Vulnerable to 1.c4 ♚ (only 43%)

Deep Analysis

Stockfish 18 · Classical games · 78 analyzed

Accuracy by phase
Opening96.5%
Middlegame94.0%
Endgame96.0%

Clutch Factor

Performance under pressure

+5%
Winning (+2 or more)95%
28 Games
Equal position95%
28 Games
Losing (-2 or more)91%
22 Games

Problematic Pieces

Which pieces cause most errors?

♖
27%
13 errors
♗
23%
11 errors
♙
17%
8 errors
♞
15%
7 errors
♕
10%
5 errors
♔
8%
4 errors

Critical Moment

When does the first serious error occur?

Move 51average
1-15
16-25
26-35
36-45
46+
100% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

2
2
2
2
3
3
2
5
2
2
abcdefgh
Many
Few
Critical squares
e45 err
e53 err
e63 err
c22 err
c32 err
e4/e5 concentrate most errors. Force decisions in those zones.

Recent Games

D
Stehno, Pavel2306

TCh-CZE Extraliga 2025-26 · 29 Mar 2026

½-½
W
Konopka, Maciej2326

Å¡achy.cz Extraliga 2025-... · 28 Mar 2026

0-1
W
Konopka, Michal2321

Round 10: Konopka, Michal... · 28 Mar 2026

0-1
D
Velicka, Petr2347

šachy.cz Extraliga 2025-2... · 22 Feb 2026

½-½
W
Rabatin, Jakub2322

šachy.cz Extraliga 2025-2... · 21 Feb 2026

0-1
W
Baklan, Vladimir2561

TCh-CZE Extraliga 2025-26 · 11 Jan 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!
White
Sicilian: e6 Systems
50.0%
10 Games·Loses

1.e4 c5 2.Nf3 e6

Black
Sicilian: Classical
55.6%
9 GamesLow sample·Loses

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6

Strengths

AVOID
White
Queen's Gambit Declined
72.2%
36 Games·Wins

1.d4 d5 2.c4 e6

Catalan
64.7%
17 Games·Wins

1.d4 Nf6 2.c4 e6 3.g3

Black
Scotch: Classical
65.2%
23 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5

Ruy Lopez: Closed
51.5%
33 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#52Rd7??
Endgame
vs Vyskocil
OTB·2025
▶
#31Bg7??
Tactics
vs Jasny
OTB·2022
▶
#27Rdf8??
Tactics
vs Chytilek
OTB·2020
▶
#32g6??
Tactics
vs Vesselovsky
OTB·2020
▶
#61Kd5??
Endgame
vs Petr
Blitz·2019
▶
#34Kb4??
Endgame
vs Suran
Blitz·2019
▶
#55Rf5+??
Endgame
vs Navara
Blitz·2019
▶
#12Nxf7??
Tactics
vs Stocek
Blitz·2019
▶
#34Bg4??
Tactics
vs Korobov
OTB·2019
▶
#31Re8??
Tactics
vs Kraus
OTB·2019
Endgame Statistics

21 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2026
2025
2024
2022
2021
2020
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
443 Games
52%28%20%
1.d4
67%
359
1.e4
61%
84
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