Scouting report: Ulf Andersson (GM, SWE)

3,158 over-the-board games in the Chess Stalker database (3,075 classical, 70 rapid, 13 blitz): 30% wins, 58% draws, 11% losses. FIDE rating 2519 standard, 2474 rapid, 2473 blitz. 373 games analyzed with Stockfish: 94% accuracy, 0.04 blunders per game.

  • Opening repertoire of Ulf Andersson as White and Black, with results per line — free.
  • Weaknesses and blunder patterns, evaluated with Stockfish — free.
  • Recent over-the-board games and endgame statistics.
  • Twin Bot: a sparring bot that imitates Ulf Andersson's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/1700014 — no account needed.

Ulf Andersson

GM

Swedenborn 1951FIDE ID 1700014

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2420
2460
2500
2540
2518 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2519
2474
2473
2640peak, Jan 2001
3,158games
957wins, 30%
1,841draws, 58%
360losses, 11%

Play style

before facing them
Elite accuracy: 94.5% average
Very consistent (89%)
Very precise: only 0.0 blunders/game
Dominates 1.d4 as ♔ (67% in 248 games)
Vulnerable to 1.g3 ♚ (only 48%)

Play against Andersson's Twin

Their real openings, level & style

Based on 3,158 games

Openings

3,158 games

Weaknesses

where they slip as ♔ White

No significant weaknesses detected as white

Strengths

what holds up for them as ♔ White
Sicilian: 2...c61.e4 c5 2.f3 c620 games, last played 2 months ago60.0%wins

Deep analysis

Stockfish · Classical · 373 analyzed
Accuracy by phase
Opening
96.7%
Middlegame
95.0%
Endgame
96.0%
Clutch factor
+3%
Winning (+2)
94%
Equal
95%
Losing (−2)
92%
Problematic pieces
23%
87 err
21%
78 err
18%
69 err
15%
56 err
11%
43 err
11%
41 err
Critical moment
Move 38 avg
12%
1-15
25%
16-25
12%
26-35
19%
36-45
31%
46+
31% of blunders occur after move 46. Keep tension until then.
Error heatmap · Critical squares
18
Few
Many
c6
18
c5
14
e5
14
e8
13
c4
12
c6/c5 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#35
da7?? vs Sikorova
Middlegame · OTB · 2025
#60
b8?? vs Kalantaryan
Endgame · Blitz · 2024
#48
gxh6?? vs Nadanian
Endgame · OTB · 2024
#37
xc8?? vs Smeets
Middlegame · OTB · 2024
#35
d2?? vs Radojicic
Endgame · Blitz · 2023
#16
e5?? vs Rothebarth
Middlegame · OTB · 2022

Recent games

Vedder, Richard(2205)

FishPartners Open 2026 · 4 Jul 2026

½–½
Labruyere, Roger(2202)

FishPartners Open 2026 · 4 Jul 2026

1–0
Van der Wiel, John T.H.(2371)

FishPartners Open 2026 · 4 Jul 2026

½–½
Fridman, Daniel(2564)

FishPartners Open 2026 · 4 Jul 2026

½–½
De Man, Burg(1774)

FishPartners Open 2026 · 4 Jul 2026

1–0
De Romph, Guido(2009)

FishPartners Open 2026 · 4 Jul 2026

1–0

Endgame statistics

Repertoire

PRO
3,158 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
1,610 games36%W58%D6%L
Move
1. f3
9572y
34%60%
64%
1. d4
2482m
39%55%
67%
1. c4
208Apr 2000
32%65%
65%
1. e4
18422y
46%43%
67%
1. g3
7Sept 1968
1457%29%
43%
1. b3
3
33%67%
33%
1. b4
3
67%33%
67%

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