ECO A00 · Van Geet Opening

Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit

1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3

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Black to move. The arrow shows Stockfish’s best move.
Best move

4… exf4−0.93

Black is clearly better. Stockfish 18, depth 18.

Analyze this position

In the Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit (A00), reached after 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3, Stockfish 18 recommends 4… exf4 for Black. Black is clearly better (−0.93).

Top engine moves

  1. −0.934… exf4 5. e3 Bf5 6. Bd3 Qd5 7. c4 dxc3 8. dxc3 Nc6 9. Qc2
  2. −0.494… f5 5. Neg5 Nc6 6. e3 h6 7. Nh3 e4 8. Ne5 Nf6 9. Ng6
  3. −0.334… Nf6 5. Nxf6+ gxf6 6. d3 Nc6 7. g3 Bg4 8. Bg2 Qd7 9. Nh4

Frequently asked questions

What is the best move in the Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit?
After 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3, Stockfish 18 at depth 18 recommends 4… exf4 for Black, continuing 5. e3 Bf5 6. Bd3 Qd5 7. c4 dxc3 8. dxc3 Nc6 9. Qc2. Black is clearly better (−0.93). The next best moves are 4… f5 (−0.49) and 4… Nf6 (−0.33).
Is the Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit a good opening?
Stockfish rates the position at −0.93: black is clearly better. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit?
A00. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).