Ostmoe, Geir Sune Tallaksen

NOR NOR·Born 1985·FIDE #1502778·543 Games

FIDE OTB · #1502778 · 543 Games

Classical2488543 g Games

Rapid24690 g Games

Blitz23780 g Games

Play against Ostmoe's Twin

PRO

Uses their openings, level & style

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

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543 games analyzed

Statistics

Total

543

Wins

208

Draws

206

Losses

129

38%38%24%

Play Style

before facing themWhat you need to know before facing them

Elite accuracy: 93.6% average

High resilience (59%): Dangerous even when losing

Solid conversion: 97%

Very consistent (92%)

Very precise: only 0.0 blunders/game

Dominates 1.e4 ♔ (75% in 16 games)

Vulnerable to 1.c4 ♚ (only 40%)

Deep Analysis

Stockfish 18 · Classical games · 63 analyzed

Accuracy by phase

Opening

96.7%

Middlegame

93.5%

Endgame

96.0%

Clutch Factor

+5%

Winning (+2)Winning (+2)

95%31g

EqualEqual position

94%19g

Losing (−2)Losing (−2)

90%13g

Accuracy under pressure

Problematic Pieces — which cause most errors?

27%

15 err

25%

14 err

18%

10 err

11%

6 err

11%

6 err

4 err

Critical Moment

Move 30 avg

1-15

16-25

26-35

36-45

46+

Error Heatmap — where do errors occur?

Few

Many

Errors mapped

Hotspot zone

f1 / a7

Critical squares

4 err

3 err

2 err

f1/a7 account for most of the errors. Force decisions in those zones.

Openings

543 GamesBased on 543 player games

Weaknesses

— exploit these— exploit these lines

No significant weaknesses detected as white

No significant weaknesses detected as black

Strengths

— avoid these— avoid these lines

aswhite62.5%Wins

King's Indian: Main Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O16 Games · last played 15 years ago

16 Games · last played 15 years ago

aswhite62.5%Wins

King's Indian: Classical — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e516 Games · last played 15 years ago

16 Games · last played 15 years ago

asblack50.0%Wins

Italian: Two Knights — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf618 Games · last played 6 years ago

18 Games · last played 6 years ago

Critical Blunders

4 errors · Stockfish

#56Nc6??Endgamevs ElsnessOTB · 2022

#28fxe5??Tacticsvs CarlsenOTB · 2022

#47Rh7??Endgamevs AmarOTB · 2020

#49Rc4??Endgamevs StojanovicOTB · 2019

Recent Games

543 Games

Urkedal, Frode Olav Olsen(2578)

TCh-NOR Elite 2025-26 · 8 Mar 2026

½-½

Kreken, Eivind Grunt(2351)

Eliteserien 2025-26 · 7 Mar 2026

½-½

Bern, Ivar(2286)

Norwegian Team League 25-... · 7 Mar 2026

½-½

Kreken, Eivind Grunt(2347)

TCh-NOR Elite 2025-26 · 6 Mar 2026

½-½

Kaasen, Tor Fredrik(2476)

TCh-NOR Elite 2025-26 · 8 Feb 2026

½-½

Tarlev, Konstantin(2538)

Eliteserien 2025-26 · 7 Feb 2026

½-½

Endgame Statistics

PRO36 endgames (57.1%)

Strongest

80%

Queen vs Pieces

Weakest

22%

Rook vs Rook

Reaches Endgame

57.1%

36 / 63

B vs N Pref

0% · 0%

0 / 1

PiecesTypeWin %Games

Rook + Minor41.2%17

Rook + Equal Minors41.7%12

Rook vs Rook22.2%9

Rook vs Minor (Exchange)62.5%8

Rook+Bishop vs Rook+Knight33.3%6

Queen vs Pieces80%5

Rook + Minor41.2%17

Rook + Equal Minors41.7%12

Rook vs Rook22.2%9

Rook vs Minor (Exchange)62.5%8

Rook+Bishop vs Rook+Knight33.3%6

Queen vs Pieces80%5

Weakest: Rook vs Rook 22%Show all 19 types

Unlock Endgame Statistics

19 endgame categories analyzed — discover where they collapse under pressure

Repertoire

Move arrowsmost-played moves

Starting Position

Stockfish

269 Games

42%37%21%

Move	Games	%
1.d4	237	59%
1.e4 Strong	16	75%
1.Nf3	15	70%
1.c4 Weak	1	0%

MoveGamesPerformance%

1.d4

237

59%

1.e4Strong

75%

1.Nf3

70%

1.c4Weak