Scouting report: Mateusz Kolosowski (IM, POL)

712 over-the-board games in the Chess Stalker database (651 classical, 22 rapid, 39 blitz): 44% wins, 29% draws, 28% losses. FIDE rating 2435 standard, 2364 rapid, 2429 blitz. 69 games analyzed with Stockfish: 92% accuracy, 0.13 blunders per game.

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

Full report: https://chessstalker.com/fide/1129708 — no account needed.

Chess Stalker

Mateusz Kolosowski

IM

Polandborn 1992FIDE ID 1129708

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2300
2340
2380
2420
2460
2444 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2435
2429
2364
2474peak, Nov 2014
712games
310wins, 44%
204draws, 29%
198losses, 28%

Play style

before facing them
Elite accuracy: 92.0% average
Very consistent (89%)
Very precise: only 0.1 blunders/game
Dominates 1.e4 as ♔ (63% in 214 games)
Vulnerable to 1.c4 ♚ (only 39%)

Play against Kolosowski's Twin

Their real openings, level & style

Based on 712 games

Openings

712 games

Weaknesses

where they slip as ♔ White

No significant weaknesses detected as white

Strengths

what holds up for them as ♔ White
Sicilian: Closed1.e4 c5 2.♞c3 ♞c627 games, last played 10 months ago63.0%wins
Queen's Gambit Declined1.d4 d5 2.c4 e615 games, last played 5 months ago60.0%wins

Deep analysis

Stockfish · Classical · 69 analyzed
Accuracy by phase
Opening
96.6%
Middlegame
91.9%
Endgame
94.2%
Clutch factor
+6%
Winning (+2)
94%
Equal
94%
Losing (−2)
87%
Problematic pieces
23%
22 err
20%
19 err
17%
16 err
16%
15 err
12%
12 err
12%
12 err
Critical moment
Move 38 avg
0%
1-15
12%
16-25
25%
26-35
50%
36-45
12%
46+
50% of blunders occur after move 36-45. Keep tension until then.
Error heatmap · Critical squares
7
6
Few
Many
e4
7
d3
6
d2
5
h6
4
a6
3
e4/d3 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#38
♚xe5?? vs Onischuk
Endgame · OTB · 2025
#67
f3?? vs Nerkar Anand
Endgame · OTB · 2025
#46
♝xd8?? vs Nevednichy
Middlegame · Blitz · 2021
#72
c5?? vs Sankalp Gupta
Endgame · Blitz · 2021
#42
♚e4?? vs Mikhalevski
Middlegame · Blitz · 2021
#27
♝xe3?? vs Michalik
Middlegame · Blitz · 2021

Recent games

Sanal, Vahap(2551)

26th European Individual Champio... · 19 Apr 2026

½–½
David, Alexandru-Vasile(2314)

26th European Individual Champio... · 18 Apr 2026

1–0
Kucza, Karol(2319)

26th European Individual Champio... · 16 Apr 2026

½–½
Kejna, Piotr(2311)

26th European Individual Champio... · 15 Apr 2026

½–½
Warmerdam, Max(2545)

26th European Individual Champio... · 14 Apr 2026

0–1
Zawadzka, Jolanta(2324)

26th European Individual Champio... · 13 Apr 2026

1–0

Endgame statistics

Repertoire

PRO
712 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
364 games49%W25%D26%L
Move
1. e4
2145m
50%25%25%
63%
1. d4
1335m
49%25%26%
61%
1. ♞f3
65m
33%33%34%
50%
1. c4
59y
60%40%
60%
1. b3
417y
25%25%50%
38%
1. ♞c3
116y
100%
100%
1. f4
117y
100%
50%

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