Scouting report: Alexandra Kosteniuk (GM, SUI)

6,504 over-the-board games in the Chess Stalker database (5,225 classical, 588 rapid, 765 blitz): 49% wins, 23% draws, 28% losses. FIDE rating 2495 standard, 2421 rapid, 2411 blitz. 1,331 games analyzed with Stockfish: 91% accuracy, 0.18 blunders per game.

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

Full report: https://chessstalker.com/fide/4128125 — no account needed.

Chess Stalker

Alexandra Kosteniuk

GM

Switzerlandborn 1984FIDE ID 4128125

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2350
2450
2550
2523 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2495
2421
2411
2561peak, Jan 2018
6,504games
3,173wins, 49%
1,510draws, 23%
1,814losses, 28%

Play style

before facing them
Elite accuracy: 90.8% average
High resilience (64%): Dangerous even when losing
Solid conversion: 84%
Very consistent (86%)
Very precise: only 0.2 blunders/game
Dominates 1.d4 as ♔ (73% in 188 games)

Play against Kosteniuk's Twin

Their real openings, level & style

Based on 6,504 games

Openings

6,504 games

Weaknesses

where they slip as ♔ White
Alekhine Defense1.e4 ♞f6 2.e5 ♞d531 games, last played 4 months ago48.4%losses

Strengths

what holds up for them as ♔ White
King's Indian: Classical1.d4 ♞f6 2.c4 g6 3.♞c3 ♝g7 4.e4 d6 5.♞f3 O-O 6.♝e2 e511 games, last played 2 years ago90.9%wins
Nimzo-Indian: Rubinstein1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e316 games, last played 4 months ago75.0%wins

Deep analysis

Stockfish · Classical · 1,331 analyzed
Accuracy by phase
Opening
96.3%
Middlegame
91.7%
Endgame
93.8%
Clutch factor
+3%
Winning (+2)
92%
Equal
93%
Losing (−2)
89%
Problematic pieces
22%
179 err
19%
151 err
18%
145 err
15%
122 err
13%
108 err
13%
105 err
Critical moment
Move 42 avg
5%
1-15
11%
16-25
25%
26-35
27%
36-45
32%
46+
32% of blunders occur after move 46. Keep tension until then.
Error heatmap · Critical squares
24
29
30
27
25
Few
Many
e5
30
c5
29
c4
27
f4
25
e6
24
e5/c5 concentrate most errors. Force decisions in those zones.

Critical blunders

some recent costly mistakes
Zhigalko, Sergei(2572)

Move 35 · Endgame · OTB · 2026

−6.3d3??
Bortnyk, Olexandr(2604)

Move 80 · Endgame · OTB · 2026

−7.4e7??
Le Tuan Minh (VIE)(2585)

Move 27 · Middlegame · OTB · 2026

−3.0a4??
Duda, Jan-Krzysztof(2739)

Move 54 · Endgame · OTB · 2026

−3.3c4??
Sindarov, Javokhir(2776)

Move 30 · Middlegame · OTB · 2026

−3.8e7??
Caruana, Fabiano(2795)

Move 38 · Endgame · OTB · 2026

−2.7f6??
Caruana, Fabiano(2795)

Move 25 · Middlegame · OTB · 2026

−3.2f4+??
Bulmaga, Irina(2395)

Move 47 · Middlegame · Rapid · 2026

−2.7e6??
Batsiashvili, Nino(2462)

Move 38 · Endgame · Blitz · 2026

−5.3g4??
Badelka, Olga(2410)

Move 40 · Endgame · Blitz · 2026

−3.9e4??

Recent games

Brunello, Marina(2308)

46th Olympiad Women 2026 · 21 Sept 2026

½–½
Roebers, Eline(2378)

46th Olympiad Women 2026 · 20 Sept 2026

1–0
Worek, Joanna(2278)

46th Olympiad Women 2026 · 19 Sept 2026

½–½
Narva, Mai(2411)

46th Olympiad Women 2026 · 18 Sept 2026

½–½
Wafa, Shahenda(2112)

46th Olympiad Women 2026 · 17 Sept 2026

0–1
Koneru, Humpy(2509)

TechM GCL 2026 · 12 Sept 2026

½–½

Endgame statistics

PRO
Analyzing...

Repertoire

PRO
6,504 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
3,288 games54%W22%D24%L
Move
1. e4
28176d
53%2225%
64%
1. ♞f3
2323m
63%1720
72%
1. d4
1913m
61%2415
72%
1. c4
363y
44%36%20
63%
1. f4
43y
100%
50%
1. b3
41y
50%25%25%
63%
1. g4
35y
100%
100%
1. h4
15y
100%
100%

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