IM

Rosner, Jonas

GER GER·Born 1990·FIDE #24608513·629 Games

Classical2451562 Games
Rapid238811 Games
Blitz241056 Games

Statistics

629

Total

241

Wins

201

Draws

185

Losses

38%32%29%

Play Style

What you need to know before facing them

Elite accuracy: 93.3% average
Solid conversion: 81%
Very consistent (91%)
Very precise: only 0.1 blunders/game
Dominates 1.c4 ♔ (71% in 40 games)
Vulnerable to 1.c4 ♚ (only 46%)

Deep Analysis

Stockfish 18 · Classical games · 129 analyzed

Accuracy by phase
Opening96.9%
Middlegame93.5%
Endgame95.5%

Clutch Factor

Performance under pressure

+5%
Winning (+2 or more)95%
53 Games
Equal position94%
44 Games
Losing (-2 or more)90%
32 Games

Problematic Pieces

Which pieces cause most errors?

♖
23%
26 errors
♕
20%
23 errors
♞
17%
19 errors
♙
17%
19 errors
♗
12%
13 errors
♔
12%
13 errors

Critical Moment

When does the first serious error occur?

Move 44average
1-15
16-25
26-35
36-45
46+
29% of blunders occur between move 26-35. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

3
6
5
4
4
4
5
3
3
5
abcdefgh
Many
Few
Critical squares
d66 err
c35 err
e15 err
e65 err
c54 err
d6/c3 concentrate most errors. Force decisions in those zones.

Recent Games

L
Pultinevicius, Paulius2532

40. ECC Open 2025 · 25 Oct 2025

1-0
L
Gorshtein, Ido2537

Round 6: Gorshtein, Ido -... · 24 Oct 2025

1-0
W
Zakin, Ilay2308

Round 5: Rosner, Jonas - ... · 23 Oct 2025

1-0
W
Sjodahl, Pontus2431

Round 4: Rosner, Jonas - ... · 22 Oct 2025

1-0
D
Vidit, Santosh Gujrathi2716

Round 3: Vidit, Santosh G... · 21 Oct 2025

½-½
W
Sylvan, Jacob2303

Round 2: Rosner, Jonas - ... · 20 Oct 2025

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!
White

No significant weaknesses detected as White

Black
Sicilian: e6 Systems
60.9%
23 Games·Loses

1.e4 c5 2.Nf3 e6

Strengths

AVOID
White
Sicilian: Open
72.7%
11 Games·Wins

1.e4 c5 2.Nf3 d6 3.d4

French Defense
61.1%
18 Games·Wins

1.e4 e6 2.d4 d5

Black
Queen's Gambit Declined
46.7%
30 Games·Wins

1.d4 d5 2.c4 e6

Sicilian: Kan
45.5%
11 Games·Wins

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#36Kh8??
Tactics
vs Gorshtein
OTB·2025
▶
#58Qf5??
Endgame
vs Vidit
OTB·2025
▶
#19Qc7??
Tactics
vs Solodovnichenko
OTB·2024
▶
#44Nd2+??
Endgame
vs Chassard
OTB·2024
▶
#28Qb4??
Tactics
vs Lye
OTB·2024
▶
#57Nc3??
Endgame
vs Ren
OTB·2022
▶
#33Ne7??
Tactics
vs Horvath
OTB·2022
▶
#27Qa7??
Tactics
vs Farokhi
OTB·2022
▶
#37g3??
Tactics
vs Pajeken
OTB·2022
▶
#37Ra8??
Tactics
vs Horvath
OTB·2022
Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2025
2024
2023
2022
2021
2020
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
310 Games
44%32%24%
1.e4
62%
178
1.d4
47%
73
1.c4
70%
41
1.Nf3
68%
17
1.g3
0%
1
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