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Blackmar-Diemer Gambit

Moves

White scores

52.7%

Wins more
Loses moreEvenWins more

51.0% won3.3% drawn45.7% lost

Theory 44.8% · Stockfish −0.6

Every level and clock · 14M games

8
7
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5
4
3
2
a1
b
c
d
e
f
g
h
2.e4
Analyze this line

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<100010001200140016001800200022002500+

Win rate by rating

White’s score gets better as the rating rises.

RatingScore against evenScoreWonGames
46.6%44.4%972K
50.7%49.1%1.2M
52.3%50.9%1.7M
52.7%51.3%2.3M
53.5%52.0%2.7M
53.8%52.1%2.6M
54.0%52.1%1.6M
54.3%52.1%714K
Widest edge55.1%52.4%99K

Every clock · Tap a row to set your level.

What does Black play next?

Black's most played reply is 2…⁠dxe4 3.Nc3 f5, the Netherlands Variation.

Is the Blackmar-Diemer Gambit good?

Yes, for White, across every level and clock.

Everyone52.7
Stockfish44.8

Stockfish at depth 22 · −0.6 for White

Floor 52.7 is the worst score you would still get, 90% confident.

Among the families

20th of 66 families White can choose

Where it wins · rating × clock

<100010001200140016001800200022002500+Every levelUltraBulletBulletBlitzRapidClassical
Best 57.8% · 2500+ blitzWorst 35.9% · under 1000 classical

Faint, hatched: few games, never the best or worst. –: too few to score. Tap a cell to set your level and clock.

Does the gambit hold up?

White still scores above 50% at 2500+, the highest rating measured.

Average game length

How do you score in your own openings?

Leaks reads your recent games and lists the openings you score worst in.

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More Blackmar-Diemer Gambit lines

Most played first; each line counts its own games.

All 46 Blackmar-Diemer Gambit lines, ranked

46 variations · ranked by floor

Floor — the worst score you would still get, 90% confident.

1
Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation15K games
63.3%Floor 62.6%
2
Blackmar-Diemer Gambit Accepted: Euwe Defense728K games
60.2%Floor 60.1%
3
Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack11K games
59.2%Floor 58.4%
Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation68K games
58.4%Floor 58.1%
Blackmar-Diemer Gambit Declined45K games
57.7%Floor 57.3%
Blackmar-Diemer Gambit Accepted: Ziegler Defense333K games
56.9%Floor 56.8%
Blackmar-Diemer Gambit Declined: Weinsbach Defense419K games
56.7%Floor 56.6%
Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack17K games
57.1%Floor 56.5%
Blackmar-Diemer Gambit: Netherlands Variation758K games
55.6%Floor 55.5%
Blackmar-Diemer Gambit Accepted: Ritter Defense15K games
56.1%Floor 55.4%
Blackmar-Diemer Gambit Accepted: Ryder Gambit895K games
55.5%Floor 55.4%
Blackmar-Diemer Gambit Declined: O'Kelly Defense392K games
55.1%Floor 55.0%
Blackmar-Diemer Gambit Accepted: Pietrowsky Defense272K games
55.0%Floor 54.8%
Blackmar-Diemer Gambit Accepted: Teichmann Defense752K games
54.9%Floor 54.8%
Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack6.9K games
55.8%Floor 54.8%
Blackmar-Diemer Gambit Accepted: Schlutter Defense9.0K games
55.6%Floor 54.7%
Blackmar-Diemer Gambit: Zeller Defense651K games
54.3%Floor 54.2%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack13K games
54.4%Floor 53.6%
Blackmar-Diemer Gambit Declined: Gedult Defense6.1K games
54.1%Floor 53.1%
Blackmar-Diemer Gambit: von Popiel Gambit869K games
52.9%Floor 52.8%
Blackmar-Diemer Gambit: Blackmar Gambit1.7M games
52.4%Floor 52.4%
Blackmar-Diemer Gambit Accepted: Kaulich Defense28K games
52.9%Floor 52.4%
Blackmar-Diemer Gambit Accepted88K games
52.5%Floor 52.2%
Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit420 games
55.6%Floor 51.6%
Blackmar-Diemer Gambit Declined: Langeheinicke Defense94K games
51.6%Floor 51.3%
Blackmar-Diemer Gambit Accepted: Holwell Defense1.8K games
52.9%Floor 51.0%
Blackmar-Diemer Gambit Declined: Vienna Defense424K games
51.0%Floor 50.8%
Blackmar-Diemer Gambit: Rasa-Studier Gambit196K games
50.1%Floor 49.9%
Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit79K games
50.2%Floor 49.9%
Blackmar-Diemer Gambit: Reversed Albin Countergambit150K games
50.0%Floor 49.8%
Blackmar-Diemer Gambit Declined: Elbert Countergambit83K games
50.0%Floor 49.7%
Blackmar-Diemer Gambit Declined: Lamb Defense254K games
49.7%Floor 49.5%
Blackmar-Diemer Gambit3.4M games
49.5%Floor 49.5%
Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack20K games
50.1%Floor 49.5%
Blackmar-Diemer Gambit Declined: Brombacher Countergambit60K games
49.6%Floor 49.3%
Blackmar-Diemer Gambit: Diemer-Rosenberg Attack171K games
49.4%Floor 49.2%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack1.4K games
51.3%Floor 49.1%
Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation84K games
49.1%Floor 48.8%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack1.2K games
51.1%Floor 48.7%
Blackmar-Diemer Gambit Accepted: Gunderam Defense139K games
48.7%Floor 48.5%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack5.4K games
49.4%Floor 48.3%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense93K games
48.6%Floor 48.3%
Blackmar-Diemer Gambit: Zeller Defense, Soller Attack57K games
48.5%Floor 48.1%
Blackmar-Diemer Gambit: Fritz Attack358K games
47.8%Floor 47.7%
Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation1.7K games
48.6%Floor 46.6%
Blackmar-Diemer Gambit: Lemberger Countergambit183K games
46.2%Floor 46.1%
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Methodology

Across every level and clock, the Blackmar-Diemer Gambit family scores 52.7% for White, from 14M rated Lichess games across 46 variations, and the low and high ends of its range both round to that same figure at this precision. Win rate, draw rate and loss rate come from games played September 2023 to August 2026.

How the figures are made
Whose games these are
14M rated games played on Lichess (2023-09 to 2026-08). The games are Lichess’s and free for anyone to use. What is ours is the reading of them. Last rebuilt September 2026.
Which games we count
  • Rated games only — nothing casual.
  • Both players within 200 rating points of each other. A mismatch tells you about the gap, not about the opening.
  • At least 2 moves played.
  • A game is filed under White’s rating.
Why every number comes with a range
A number off a few hundred games is a guess. The same number off millions is a fact. The range is what tells them apart, and it is what the lists rank on — so an opening cannot reach the top on a lucky run of forty games. The more games behind a figure, the narrower its range.
What the Floor and Edge at worst are
The Floor is the worst score you would still get, 90% confident: the low end of a figure’s range, not its average. Edge at worst is how far wins run ahead of losses, 90% confident, so above zero, that side wins more than it loses even on a bad day. Each is stated for the rating and clock shown, over the games that reached the position. They are on different scales: a score sits at 50 when the sides are level, an edge at zero.
How much we need before we say anything
An opening page needs 100 games. A figure on it needs 100 games at its rating and clock: short of that the answer reads a wider scope and says so, a table row shows only its count, and a map cell shows a dash. Under 1.0K games a figure is drawn faint, and never leads a list or counts as the best or worst place the line wins. The chaos and trap lists need 500 games overall and 250 games at one rating or clock.