GM

Andersson, Ulf

SWE SWE·Born 1951·FIDE #1700014·3,173 Games

Classical25193,090 Games

Rapid247470 Games

Blitz247313 Games

Statistics

3173

Total

964

Wins

1848

Draws

361

Losses

30%58%11%

Play Style

What you need to know before facing them

Elite accuracy: 94.5% average

Very consistent (89%)

Very precise: only 0.0 blunders/game

Dominates 1.e4 ♔ (67% in 184 games)

Vulnerable to 1.g3 ♚ (only 48%)

Deep Analysis

Stockfish 18 · Classical games · 337 analyzed

Accuracy by phase

Opening96.8%

Middlegame95.1%

Endgame96.2%

Clutch Factor

Performance under pressure

+3%

Winning (+2 or more)95%

36 Games

Equal position95%

240 Games

Losing (-2 or more)91%

61 Games

Problematic Pieces

Which pieces cause most errors?

♖

23%

76 errors

♙

21%

68 errors

♞

19%

62 errors

♕

15%

50 errors

♗

11%

38 errors

♔

11%

37 errors

Critical Moment

When does the first serious error occur?

Move 39average

1-15

16-25

26-35

36-45

46+

36% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

12

11

10

18

10

11

11

12

10

9

abcdefgh

Many

Few

Critical squares

c618 err

e512 err

e812 err

c511 err

e711 err

c6/e5 concentrate most errors. Force decisions in those zones.

Recent Games

W

Van Diermen, Arie1952

FishPartners Open 2025 · 5 Jul 2025

1-0

L

Labruyere, Roger2282

FishPartners Open 2025 · 5 Jul 2025

0-1

W

Vedder, Henk2326

FishPartners Open 2025 · 5 Jul 2025

1-0

W

Janse, Jan Jaap2109

FishPartners Open 2025 · 5 Jul 2025

0-1

L

Van Foreest, Lucas2525

FishPartners Open 2025 · 5 Jul 2025

1-0

W

Terlouw, Wouter2246

FishPartners Open 2025 · 5 Jul 2025

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

No significant weaknesses detected as White

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Sicilian: 2...Nc6

60.0%

20 Games·Wins

1.e4 c5 2.Nf3 Nc6

Black

Sicilian: Classical

45.5%

11 Games·Wins

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

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#35Rda7??

Tactics

vs Sikorova

OTB·2025

▶

#55c4d4??

Endgame

vs Karpov

OTB·1983

▶

#40Qg1??

Endgame

vs Korchnoi

OTB

▶

#70Qb3??

Endgame

vs Larsen

OTB

▶

#18Rc1??

Tactics

vs Najdorf

OTB

▶

#39d3c5??

Endgame

vs Karpov

OTB

▶

#31Bd8??

Tactics

vs Korchnoi

OTB

▶

#74Qe3+??

Endgame

vs Larsen

OTB

▶

#36b8c6??

Endgame

vs Karpov

OTB

▶

#12c7c6??

Endgame

vs Karpov

OTB

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2025

2024

2023

2022

2020

2019

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

1617 Games

36%58%6%

Move	Games	Performance	%
1.Nf3	965		64%
1.d4	247		67%
1.c4	208		65%
1.e4	184		67%
1.g3	7		43%
1.b4	3		67%
1.b3	3		33%

1.Nf3

64%

965

1.d4

67%

247

1.c4

65%

208

1.e4

67%

184

1.g3

43%

7

1.b4

67%

3

1.b3

33%

3

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