GM
Wieczorek, Oskar
POL·Born 1994·FIDE #1133950·2,277 Games
POL Classical24992,015 Games
Rapid2334149 Games
Blitz2387113 Games
Statistics
2277
Total
1088
Wins
482
Draws
706
Losses
48%21%31%
Play Style
What you need to know before facing them
Elite accuracy: 92.8% average
Solid conversion: 83%
Very consistent (89%)
Very precise: only 0.1 blunders/game
Dominates 1.Nf3 ♔ (79% in 49 games)
Deep Analysis
Stockfish 18 · Classical games · 156 analyzed
Accuracy by phase
Opening96.2%
Middlegame92.7%
Endgame93.8%
Clutch Factor
Performance under pressure
Winning (+2 or more)93%
68 Games
Equal position94%
57 Games
Losing (-2 or more)89%
31 Games
Problematic Pieces
Which pieces cause most errors?
♙
25%
35 errors
♖
23%
32 errors
♗
14%
19 errors
♕
14%
20 errors
♞
13%
18 errors
♔
11%
15 errors
Critical Moment
When does the first serious error occur?
Move 30average
1-15
16-25
26-35
36-45
46+
43% of blunders occur between move 26-35. Keep tension until that moment.
Error Heatmap
Where do most errors occur?
6
7
4
4
5
5
4
4
4
5
abcdefgh
Many
Few
Critical squares
d57 err
c66 err
d15 err
d45 err
e45 err
d5/c6 concentrate most errors. Force decisions in those zones.
Recent Games
W
Dobrowolski, Kamil2018
blitz2026 · 13 Feb 2026
W
Janocha, Wieslaw2045
blitz2026 · 13 Feb 2026
L
Nagly, Wojciech2142
blitz2026 · 13 Feb 2026
W
Kulon, Boguslaw1809
blitz2026 · 13 Feb 2026
L
Kiszkiel, Oskar2120
blitz2026 · 13 Feb 2026
W
Nesterenko, Kyrylo2211
blitz2026 · 13 Feb 2026
Openings
Based on player games
Weaknesses
EXPLOIT!White
No significant weaknesses detected as White
Black
Ruy Lopez: Closed
63.6%11 Games·Loses
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7
Queen's Gambit Declined
53.8%13 Games·Loses
1.d4 d5 2.c4 e6
Strengths
AVOIDWhite
Sicilian: d6 Systems
56.2%194 Games·Wins
1.e4 c5 2.Nf3 d6
Black
Sicilian: e6 Systems
51.1%174 Games·Wins
1.e4 c5 2.Nf3 e6
Sicilian: d6 Systems
45.7%116 Games·Wins
1.e4 c5 2.Nf3 d6
Critical Blunders
Tactical errors analyzed with Stockfish
10 errors
▶
#61Nc4+??
Endgamevs Piekielny
Rapid·2024
▶
#30Rb2+??
Tacticsvs Lukasiewicz
Rapid·2024
▶
#54Qxb7??
Endgamevs Fromm
OTB·2024
▶
#47Re2??
Endgamevs Musial
OTB·2024
▶
#36Qxe5??
Tacticsvs Moranda
Rapid·2023
▶
#44Qb6??
Endgamevs Neugebauer
Rapid·2023
▶
#12Qd8??
Tacticsvs Ghaem Maghami
OTB·2023
▶
#40Kc3??
Tacticsvs Socko
OTB·2023
▶
#21Bd3??
Tacticsvs Hulka
Rapid·2022
▶
#37a4??
Tacticsvs Donchenko
Rapid·2022
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
efgh1141 Games
52%20%28%
1.e4
62%1004
1.c4
64%53
1.Nf3
79%49
1.d4
62%17
1.Nc3
58%6
1.b3
92%6
1.g3
50%5
1.c3
0%1