Players
Jonasz Baum
Photo: This photo was taken by Krzysztof SzelągAutorem zdjęcia jest, CC BY-SA 4.0, via Wikimedia Commons
IM

Jonasz Baum

PolandBorn 2004 (age 22)FIDE ID 1195360

Luft classical

23002400250026002023202420252026
Monthly Luft ratings, now 2451
FIDE

FIDE classical

18002000220024002600201620182020202220242026
Monthly FIDE ratings, now 2457
Luft

Flair

Jonasz Baum's classical flairs

1 of 19 earned over the last 12 months

  • Chameleon8 different defences in 8 games with black
  • TitanLuft classical rating averaging 2800+ over the last 4 years
  • Serial WinnerWon 2+ elite events in the last 12 months
  • UnderdogRegularly beats players rated 50+ higher
  • Fortress25+ games in a row without a loss
  • Black BeltDoes better with black than with white
  • IronmanPlayed 50+ games over the last 12 months
  • RisingAged 18 or under, Luft rating up 40+ over the last 12 months
  • Endgame SpecialistEndgame 90+: converting, saving and not throwing endgames
  • TacticianTactics 90+: sharp, tactical games they made sharp
  • LightningTop 20 at speed chess (mostly blitz, some rapid)
  • Hot StreakAt least 6 points from 7 straight games against strong opposition
  • SignatureSticks to one defence with black far more than most
  • WildcardBrilliant one event, off the next: hard to predict
  • ReliableConsistent across all top events
  • FighterRarely draws, and wins far more than they lose
  • AdaptableTactics and Positional both 90+
  • PositionalPositional 90+: slow, quiet games they steered
  • PodiumTop 3 in at least half of their elite events
  • Chameleon

Trophy cabinet

No classical titles on record yet.

Attributes

Tactics 69Positional 67Endgame 77Openings 71Composure 68Defence 76Speed 62Consistency 69

Luft classical rating

2451No. 352

From 14 classical games in top events over the last year, playing at a 2522 level.

ResultsPlayed at a 2522 level, blended with their FIDE rating+7
Tournament winsNone in the last year0
FormThe last 3 months against the whole year−10
ConsistencyHow steady they are from event to event+2
Activity14 classical games in top events−5

Openings

Their most-played, from 16 classical games in top events over the last 4 years

OpeningGamesScore
English Opening367%
Queen's Gambit Declined1100%
Indian Defense1100%
Semi-Slav Defense150%
Tarrasch Defense150%

English Opening

With White: 3 games, won 1, drew 2, lost 0 · 67%

VariationGamesScore
King's English Variation275%
Anglo-Indian Defense150%

Queen's Gambit Declined

With White: 1 game, won 1, drew 0, lost 0 · 100%

VariationGamesScore
Main line1100%

Indian Defense

With White: 1 game, won 1, drew 0, lost 0 · 100%

VariationGamesScore
Normal Variation1100%

Semi-Slav Defense

With White: 1 game, won 0, drew 1, lost 0 · 50%

VariationGamesScore
Main line150%

Tarrasch Defense

With White: 1 game, won 0, drew 1, lost 0 · 50%

VariationGamesScore
Classical Variation150%

Ruy Lopez

With Black: 2 games, won 1, drew 1, lost 0 · 75%

VariationGamesScore
Berlin Defense275%

Indian Defense

With Black: 1 game, won 0, drew 1, lost 0 · 50%

VariationGamesScore
Anti-Nimzo-Indian150%

Bogo-Indian Defense

With Black: 1 game, won 0, drew 1, lost 0 · 50%

VariationGamesScore
Retreat Variation150%

Sicilian Defense

With Black: 1 game, won 0, drew 1, lost 0 · 50%

VariationGamesScore
Four Knights Variation150%

French Defense

With Black: 1 game, won 0, drew 0, lost 1 · 0%

VariationGamesScore
Rubinstein Variation10%

Recent events

EventPlace+/−+/−
FISU World University Championship Mind Sports 202616 Oct 20262/4−1−2
German Bundesliga 2025/2626 Apr 20265/10+14+14
European Chess Club Cup 202525 Oct 20253½/700
Dole France Throphy Nextlane Grand Prix 202428 Jul 20241/2+5+5

Best wins

OpponentRating
GMJ. Smeets10 Jan 2026 · German Bundesliga 2025/262562
GMZ. Efimenko26 Apr 2026 · German Bundesliga 2025/262556
GMA. Pijpers11 Jan 2026 · German Bundesliga 2025/262473
IMP. Mathieu13 Oct 2026 · FISU World University Championship Mind Sports 20262405
IMO. Svanda20 Oct 2025 · European Chess Club Cup 20252363

Most played

OpponentGamesWDL
GMM. KarthikeyanLast 21 Jul 2024 · Dole France Throphy Nextlane Grand Prix 20241010
GMM. BartelLast 28 Jul 2024 · Dole France Throphy Nextlane Grand Prix 20241010
FMA. ZymberiLast 19 Oct 2025 · European Chess Club Cup 20251100
IMO. SvandaLast 20 Oct 2025 · European Chess Club Cup 20251100
GMWei YiLast 21 Oct 2025 · European Chess Club Cup 20251001

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How attributes are calculated

From their games in top events over the last 12 months, each judged against the opponent's rating

  • TacticsHow well they score in sharp games they chose to make sharp.
  • PositionalHow well they score in quiet, manoeuvring games they steered.
  • EndgameHow they do in endgames against what the position promised when it began: converting a winning one earns a little, saving a losing one earns a lot, and throwing a winning one costs a lot.
  • OpeningsThe engine's verdict on their position around moves 15 to 20, against what's normal for that colour, as the score it points to. Over the last 4 years, with older games counting less.
  • ComposureHow well they score under pressure: the game straight after a loss, and the last 3 games of an event while they can still win it. Over the last 4 years.
  • DefenceHow they do in games where they were 0.8 pawns or more worse after move 18, against what that position usually scores: holding the draw earns, turning it around earns more, and losing costs a little.
  • SpeedTheir Luft rapid and blitz ratings. With neither, an estimate a little below their classical level.
  • ConsistencyTheir Luft rating, less their off days: tournaments (5+ games each) over the last 4 years where they played 50+ below it. Anything better never counts against them.

  • "How well they score" is a performance rating: the opponent's rating, plus 400 for a win and minus 400 for a loss, averaged. So it's always judged against who they played.

    The score out of 100: 80 is a 2600 level, and each 13 rating points adds one, so 2860 and up is 100.

    Fair to everyone: with only a few games of a kind, the result leans towards their overall Luft rating. Strengths and weaknesses are measured against their overall level and compared with the top 100, so a specialist's best side stands out. A little recent form is added to all but Speed.