Scouting report: Jonasz Baum (IM, POL)

1,090 over-the-board games in the Chess Stalker database (984 classical, 47 rapid, 59 blitz): 43% wins, 27% draws, 30% losses. FIDE rating 2460 standard, 2379 rapid, 2380 blitz. 563 games analyzed with Stockfish: 93% accuracy, 0.07 blunders per game.

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

Full report: https://chessstalker.com/fide/1195360 — no account needed.

Chess Stalker

Jonasz Baum

IM

Polandborn 2004FIDE ID 1195360

Rating & statistics

FIDE rating lists · Sep 2023 – Sep 2026
2150
2250
2350
2450
2550
Peak2487
2436 · Sep 2023
Oct
2024
Apr
Jul
Oct
2025
Apr
Jul
Oct
2026
Apr
Jul
Oct
Sep 2023Oct 2026
2460
2380
2379
2487peak, Apr 2025
1,090games
470wins, 43%
291draws, 27%
327losses, 30%

Play style

before facing them
Elite accuracy: 93.0% average
Very consistent (89%)
Very precise: only 0.1 blunders/game
Dominates 1.d4 as ♔ (63% in 300 games)
Vulnerable to 1.c4 ♚ (only 43%)

Play against Baum's Twin

Their real openings, level & style

Based on 1,090 games

Openings

1,090 games

Weaknesses

where they slip as ♔ White
Benoni1.d4 ♞f6 2.c4 c511 games, last played 11 months ago45.5%losses
Sicilian: e6 Systems1.e4 c5 2.♞f3 e616 games, last played last month43.8%losses

Strengths

what holds up for them as ♔ White
Slav: Semi-Slav1.d4 d5 2.c4 c6 3.♞f3 ♞f6 4.♞c316 games, last played 6 months ago62.5%wins
Sicilian: Open1.e4 c5 2.♞f3 d6 3.d432 games, last played 4 weeks ago59.4%wins

Deep analysis

Stockfish · Classical · 563 analyzed
Accuracy by phase
Opening
96.6%
Middlegame
92.9%
Endgame
95.2%
Clutch factor
+5%
Winning (+2)
94%
Equal
94%
Losing (−2)
89%
Problematic pieces
24%
110 err
19%
87 err
18%
86 err
17%
80 err
13%
61 err
9%
43 err
Critical moment
Move 43 avg
0%
1-15
19%
16-25
33%
26-35
15%
36-45
33%
46+
33% of blunders occur after move 26-35. Keep tension until then.
Error heatmap · Critical squares
21
20
Few
Many
d7
21
f3
20
g5
15
c5
14
d6
14
d7/f3 concentrate most errors. Force decisions in those zones.

Critical blunders

10 errors
#23
♞d5?? vs Kulig
Middlegame · OTB · 2025
#21
♜d7?? vs Kokoszczynski
Middlegame · OTB · 2025
#35
♝xd3?? vs Grygierczyk
Middlegame · OTB · 2025
#27
♝a3?? vs Czernek
Middlegame · Rapid · 2025
#38
axb2?? vs Levi
Endgame · OTB · 2025
#19
♞g4?? vs Odeev
Middlegame · OTB · 2025

Recent games

Aarav Sinha(2318)

Kanizsa Open 2026 · 22 Aug 2026

½–½
Dubnevych, Maksym(2350)

Kanizsa Open 2026 · 21 Aug 2026

0–1
Avsar, Gediz(2343)

Kanizsa Open 2026 · 20 Aug 2026

½–½
Ostovic, Matija(2401)

Kanizsa Open 2026 · 19 Aug 2026

½–½
Domin, Yan(2335)

Kanizsa Open 2026 · 18 Aug 2026

1–0
Avinash Ramesh(2345)

Kanizsa Open 2026 · 17 Aug 2026

½–½

Endgame statistics

Repertoire

PRO
1,090 games in scope
8
7
6
5
4
3
2
1a
b
c
d
e
f
g
h
555 games46%W26%D28%L
Move
1. d4
3014w
50%26%24
62%
1. e4
1943w
43%25%32%
55%
1. ♞f3
287m
46%29%25%
61%
1. c4
274w
42%35%23
57%
1. g3
46y
25%75%
13%
1. ♞c3
16y
100%
0%

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