Rosner, Jonas

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

Classical2451562 Games

Rapid238811 Games

Blitz241056 Games

Play against Rosner, Jonas's Twin

PRO

Uses their openings, level & style

Practice against a bot that uses their real openings and playing style

Ready to play

629 games analyzed

Statistics

Total

629

Wins

241

Draws

201

Losses

185

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 · 132 analyzed

Accuracy by phase

Opening

96.9%

Middlegame

93.4%

Endgame

95.4%

Clutch Factor — Move accuracy when winning vs. equal vs. losing — does their level drop when the game turns against them?

+5%

Winning (+2 or more)

95%53g

Equal position

94%44g

Losing (-2 or more)

90%35g

Performance under pressure

Problematic Pieces — Which pieces cause most errors?

21%

25 errors

21%

26 errors

19%

23 errors

17%

20 errors

12%

14 errors

11%

13 errors

Critical Moment — When does the first serious error occur?

Move 44 average

14%

29%

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?

Few

Many

Errors mapped

Hotspot zone

d6 / c3

Critical squares

6 err

5 err

d6/c3 concentrate most errors. Force decisions in those zones.

Openings

Based on player games

Weaknesses

— exploit these lines

No significant weaknesses detected as White

Black60.9%Loses

Sicilian: e6 Systems — 1.e4 c5 2.Nf3 e6

23 Games · last played 9 months agoPlay this line

Strengths

— avoid these lines

White72.7%Wins

Sicilian: Open — 1.e4 c5 2.Nf3 d6 3.d411 Games · last played 2 years ago

White61.1%Wins

French Defense — 1.e4 e6 2.d4 d518 Games

Black46.7%Wins

Queen's Gambit Declined — 1.d4 d5 2.c4 e630 Games

Black45.5%Wins

Sicilian: Kan — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a611 Games

Critical Blunders

10 errors · Stockfish

#36Kh8??Tacticsvs GorshteinOTB · 2025

#58Qf5??Endgamevs ViditOTB · 2025

#33f3??Tacticsvs LevitanOTB · 2025

#19Qc7??Tacticsvs SolodovnichenkoOTB · 2024

#44Nd2+??Endgamevs ChassardOTB · 2024

#28Qb4??Tacticsvs LyeOTB · 2024

#31Rc8??Tacticsvs NiemannOTB · 2024

#57Nc3??Endgamevs RenOTB · 2022

#33Ne7??Tacticsvs HorvathOTB · 2022

#27Qa7??Tacticsvs FarokhiOTB · 2022

Recent Games

629 Games

Pultinevicius, Paulius(2532)

40. ECC Open 2025 · 25 Oct 2025

1-0

Gorshtein, Ido(2537)

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

1-0

Zakin, Ilay(2308)

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

1-0

Sjodahl, Pontus(2431)

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

1-0

Vidit, Santosh Gujrathi(2716)

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

½-½

Sylvan, Jacob(2303)

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

1-0

Endgame Statistics

PRO22 endgame categories analyzed

Endgame Statistics

Reveal weaknesses →

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

310 Games

44%32%24%

Move	Games	%
1.e4	178	62%
1.d4	73	47%
1.c4	41	70%
1.Nf3	17	68%
1.g3 Weak	1	0%

MoveGamesPerformance%

1.e4

178

62%

1.d4

47%

1.c4

70%

1.Nf3

68%

1.g3Weak