Andersson, Ulf

SWE SWE·Born 1951·FIDE #1700014·3,179 Games

Classical25193,096 Games

Rapid247470 Games

Blitz247313 Games

Play against Andersson, Ulf's Twin

PRO

Uses their openings, level & style

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

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3179 games analyzed

Statistics

Total

3179

Wins

967

Draws

1851

Losses

361

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

Opening

96.8%

Middlegame

95.1%

Endgame

96.2%

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

+3%

Winning (+2 or more)

95%36g

Equal position

95%240g

Losing (-2 or more)

91%61g

Performance under pressure

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 39 average

14%

21%

14%

36%

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?

Few

Many

Errors mapped

114

Hotspot zone

c6 / e5

Critical squares

18 err

12 err

11 err

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

Openings

Based on player games

Weaknesses

— exploit these lines

No significant weaknesses detected as White

No significant weaknesses detected as Black

Strengths

— avoid these lines

White60.0%Wins

Sicilian: 2...Nc6 — 1.e4 c5 2.Nf3 Nc620 Games · last played 3 weeks ago

Black45.5%Wins

Sicilian: Classical — 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc611 Games · last played 13 years ago

Critical Blunders

10 errors · Stockfish

#35Rda7??Tacticsvs SikorovaOTB · 2025

#55c4d4??Endgamevs KarpovOTB · 1983

#40Qg1??Endgamevs KorchnoiOTB

#70Qb3??Endgamevs LarsenOTB

#18Rc1??Tacticsvs NajdorfOTB

#39d3c5??Endgamevs KarpovOTB

#31Bd8??Tacticsvs KorchnoiOTB

#74Qe3+??Endgamevs LarsenOTB

#36b8c6??Endgamevs KarpovOTB

#12c7c6??Endgamevs KarpovOTB