IM

Pajeken, Jakob Leon

GER GER·Born 2003·FIDE #12942839·1,790 Games

Classical24521,698 Games
Rapid24180 Games
Blitz247492 Games

Statistics

1790

Total

711

Wins

431

Draws

641

Losses

40%24%36%

Play Style

What you need to know before facing them

Elite accuracy: 93.5% average
Solid conversion: 86%
Very consistent (90%)
Very precise: only 0.0 blunders/game
Dominates 1.Nf3 ♔ (67% in 101 games)
Vulnerable to 1.c4 ♚ (only 33%)

Deep Analysis

Stockfish 18 · Classical games · 481 analyzed

Accuracy by phase
Opening96.8%
Middlegame93.5%
Endgame94.9%

Clutch Factor

Performance under pressure

+4%
Winning (+2 or more)94%
160 Games
Equal position95%
200 Games
Losing (-2 or more)90%
121 Games

Problematic Pieces

Which pieces cause most errors?

♖
21%
74 errors
♙
20%
70 errors
♕
18%
61 errors
♗
16%
56 errors
♞
13%
46 errors
♔
11%
39 errors

Critical Moment

When does the first serious error occur?

Move 42average
1-15
16-25
26-35
36-45
46+
35% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

10
10
9
11
11
22
11
11
9
11
abcdefgh
Many
Few
Critical squares
e522 err
b411 err
c311 err
d511 err
f511 err
e5/b4 concentrate most errors. Force decisions in those zones.

Recent Games

L
Moussard, Jules2598

grenke Chess Open 2026 · 5 Apr 2026

1-0
D
Kurmangaliyeva, Liya2289

grenke Chess Open 2026 · 5 Apr 2026

½-½
D
Kovacsy, Barnabas2243

grenke Chess Open 2026 · 4 Apr 2026

½-½
W
Albrecht, Neil2325

grenke Chess Open 2026 · 4 Apr 2026

1-0
W
Robert, Yoann2243

Grenke Chess Festival 202... · 3 Apr 2026

1-0
W
Bentel, Robin2213

grenke Chess Open 2026 · 3 Apr 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!
White
Slav Defense
62.5%
8 GamesLow sample·Loses

1.d4 d5 2.c4 c6

Italian: Giuoco Piano
60.0%
10 Games·Loses

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Black
Sicilian: e6 Systems
60.0%
10 Games·Loses

1.e4 c5 2.Nf3 e6

English: Four Knights
57.1%
14 Games·Loses

1.c4 e5 2.Nc3 Nf6

Strengths

AVOID
White
Queen's Gambit Declined
56.0%
25 Games·Wins

1.d4 d5 2.c4 e6

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors
▶
#38Kd3??
Tactics
vs Dahl
OTB·2025
▶
#28Re7??
Tactics
vs Dyrgaard
OTB·2025
▶
#18e5??
Tactics
vs Kantans
OTB·2025
▶
#35Ne7??
Tactics
vs Stankovic
OTB·2025
▶
#59Kc6??
Endgame
vs Olsen
OTB·2025
▶
#106Kh2??
Endgame
vs Engel
OTB·2025
▶
#20Bd7??
Tactics
vs Klimkowski
OTB·2025
▶
#35d6??
Tactics
vs Lemmers
OTB·2025
▶
#27Ra7??
Tactics
vs Smith
OTB·2024
▶
#10Ng4??
Tactics
vs Neuhoff
OTB·2024
Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire
☰ All
♟ Classical
⚡ Rapid
🔥 Blitz
PRO
·
2026
2025
2024
2023
2022
2021
PRO
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
Starting Position
897 Games
43%23%34%
1.d4
52%
511
1.e4
57%
275
1.Nf3
67%
101
1.c4
67%
6
1.e3
50%
4
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