Scouting report: Gudmundur Sigurjonsson (GM, ISL)

1,041 over-the-board games in the Chess Stalker database (1,035 classical, 6 rapid): 32% wins, 48% draws, 20% losses. FIDE rating 2463 standard. 33 games analyzed with Stockfish: 92% accuracy, 0.03 blunders per game.

  • Opening repertoire of Gudmundur Sigurjonsson 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 Gudmundur Sigurjonsson's style so you can rehearse the matchup — free online.

Full report: https://chessstalker.com/fide/2300079 — no account needed.

Gudmundur Sigurjonsson

GM

ISLborn 1947FIDE ID 2300079

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2440
2480
2463 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2463
2463peak, Jan 2001
1,041games
333wins, 32%
497draws, 48%
211losses, 20%

Play style

before facing them
Elite accuracy: 91.7% average
Low resilience (19%): Doesn't save lost positions
Very consistent (90%)
Very precise: only 0.0 blunders/game
Dominates 1.Nf3 as ♔ (64% in 63 games)
Vulnerable to 1.c4 ♚ (only 40%)

Play against Sigurjonsson's Twin

Their real openings, level & style

Based on 1,041 games

Openings

1,041 games

Weaknesses

where they slip as ♔ White
Sicilian: Rossolimo1.e4 c5 2.f3 c6 3.b5only 8 games, last played 51 years ago50.0%losses

Strengths

what holds up for them as ♔ White

No consistent strengths detected as white

Deep analysis

Stockfish · Classical · 33 analyzed
Accuracy by phase
Opening
96.0%
Middlegame
93.0%
Endgame
94.0%
Clutch factor
+5%
Winning (+2)
94%
Equal
95%
Losing (−2)
89%
Problematic pieces
27%
7 err
19%
5 err
19%
5 err
15%
4 err
12%
3 err
8%
2 err
Critical moment
Move 30 avg
0%
1-15
0%
16-25
100%
26-35
0%
36-45
0%
46+
100% of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squares
4
Few
Many
f3
4
c4
2
c5
2
c7
2
g1
2
f3/c4 concentrate most errors. Force decisions in those zones.

Critical blunders

4 errors
#30
c7?? vs Portisch
Middlegame · OTB
#29
b6?? vs Larsen
Middlegame · OTB
#22
d1?? vs Portisch
Middlegame · OTB
#25
g7?? vs Geller
Middlegame · OTB

Recent games

Ulfarsson, Magnus Orn(2377)

TCh-ISL Div 1 2014-15 · 21 Mar 2015

0–1
Baldursson, Haraldur(1971)

TCh-ISL Div 1 2014-15 · 21 Mar 2015

0–1
Arnalds, Stefan(1990)

TCh-ISL Div 1 2014-15 · 19 Mar 2015

1–0
Rist, Karl-Johan(1677)

Reykjavik Open 2015 · 18 Mar 2015

1–0
Opasiak, Dustin Tennessee(1781)

Reykjavik Open 2015 · 17 Mar 2015

0–1
Hojgaard, Brandur(1787)

Reykjavik Open 2015 · 16 Mar 2015

½–½

Endgame statistics

Repertoire

PRO
1,041 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
529 games37%W47%D16%L
Move
1. e4
428Jul 1986
36%48%16
60%
1. f3
6312y
43%43%14
64%
1. d4
3011y
40%47%13
63%
1. c4
412y
100%
0%
1. g3
324y
33%67%
33%
1. b4
1
100%
100%

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