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Blackmar-Diemer Gambit AcceptedRyder Gambit

D00For WhiteAggressiveLow theory

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3

A line for White. Every figure below is computed separately for each rating band, and every one carries its own sample size.

Win rate, White
47.5%55.6%54.5%52.4%
Band 600, n = 448Band 1000, n = 3,957Band 1400, n = 3,962Band 1800, n = 8,245
Blunder rate
0.0%25.0%33.3%60.0%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CABC
White, band 600White, band 1000White, band 1400White, band 1800
Share of games
0.0%0.0%0.0%0.0%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60047.5%3.8%48.7%0.0%ply 9.0448C
100055.6%2.5%41.9%25.0%ply 9.53,957A
140054.5%2.1%43.4%33.3%ply 9.03,962B
180052.4%3.7%43.9%60.0%ply 9.08,245C

Results by band

What it actually does, band by band.

All four bands are on the page. The one matching your rating is marked. Nothing here is averaged across bands.

600Your bandC at 600Blunder rate 0.0%, band median 44.6%

At 600, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 47.5% for White across 448 games. That is below average at this level. Games in this line leave known theory around move 5 on average, and 0.0% include an early material blunder (2 games at 600).

1000Your bandA at 1000Blunder rate 25.0%, band median 42.9%

At 1000, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 55.6% for White across 3,957 games. That is comfortably above average at this level. Games in this line leave known theory around move 5 on average, and 25.0% include an early material blunder (4 games at 1000).

1400Your bandB at 1400Blunder rate 33.3%, band median 40.0%

At 1400, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 54.5% for White across 3,962 games. That is close to the average at this level. Games in this line leave known theory around move 5 on average, and 33.3% include an early material blunder (6 games at 1400).

1800Your bandC at 1800Blunder rate 60.0%, band median 36.4%

At 1800, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 52.4% for White across 8,245 games. That is below average at this level. Games in this line leave known theory around move 5 on average, and 60.0% include an early material blunder (5 games at 1800).

Blunders and traps

How this opening ends early.

The known traps that live inside the Blackmar-Diemer Gambit Accepted: Ryder Gambit. The rates are how often each one actually lands in your band, counted against every sampled game in that band.

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Halosar Trap

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3 Qb4 7. O-O-O Bg4

Sprung by White. The move that invites it is Bg4.

A Blackmar-Diemer Gambit ambush. 7...Bg4 attacks the queen but 8. Nb5 hits c7 and b4 at once, and Qxb7 follows.

0 hitsBand 600
0 hitsBand 1000
0 hitsBand 1400
0 hitsBand 1800

Read as: how often this trap line is completed per sampled game in the band.

How the Blunder Rate is measured. A material swing of three points or more inside the first 24 half-moves after leaving book, detected without an engine evaluation. It is a proxy for how sharp a position is in practice, not an engine verdict, and it is computed from a monthly game sample rather than the full corpus behind the win rates. Trap hit rates count a trap only when its full line is completed on the board.

See how the Blackmar-Diemer Gambit Accepted: Ryder Gambit ranks against every other opening in your band.

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Questions

Common questions about this page.

At 600, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 47.5% for White across 448 games. That is below average at this level. Games in this line leave known theory around move 5 on average, and 0.0% include an early material blunder (2 games at 600).

At 1000, the Blackmar-Diemer Gambit Accepted: Ryder Gambit scores 55.6% for White across 3,957 games. That is comfortably above average at this level. Games in this line leave known theory around move 5 on average, and 25.0% include an early material blunder (4 games at 1000).

The Blackmar-Diemer Gambit Accepted: Ryder Gambit (D00) is a line for White. The main line runs 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3.