Caissa Codex
D00

Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack

Chess diagram: Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack after 8. g4

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Statistics from Lichess

16,271 games: White 56.7% / Draw 5.1% / Black 38.2%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
8,6988,698
3,7983,798
2,0292,029
1,1161,116
404404
146146
2626
1414

Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 31, 2026

Engine evaluation

+0.03 The position is about equal

Best play: 8... e6 9. g5 Nd5 10. Bd3 Be7 11. h4 Na6 12. a3 Nxc3 13. bxc3

Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.

Overview

Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack (ECO D00, Closed & Semi-Closed Games) is a gambit in the Blackmar-Diemer Gambit Accepted: Teichmann Defense, reached after 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. g4 (8 moves).

In 16,271 rated Lichess games between players rated 1600 to 2500, White won 56.7%, Black 38.2% and 5.1% were drawn. Black's most played move here is 8…e6, in 53% of those games.

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How to play against the Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack

8…h6 scores best for Black: 47.6%, with Black winning 44.6% and White 49.3% of 2,029 games. The most played, 8…e6, scores 39.5% in 8,698 games, and 8…Nd5 scores lowest: 32.7%. Stockfish's first choice is 8…e6.

Main answers: those played in at least 5% of these games. Score: Black's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings

Other lines from the same position

Instead of 6. h3 Bxf3 7. Qxf3 c6 8. g4, the position after Blackmar-Diemer Gambit Accepted: Teichmann Defense also goes on to:

Cite this page

Caissa Codex. “Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack (D00)”. Lichess data as of 31 Oct 2026. https://chesscodex.org/openings/blackmar-diemer-gambit-accepted-teichmann-defense-seidel-hall-attack

https://chesscodex.org/openings/blackmar-diemer-gambit-accepted-teichmann-defense-seidel-hall-attack