Chessy
The Blackmar-Diemer Gambit: dxe4
You've pushed your d-pawn, sacrificed an e-pawn, and now you're offering another with 3.f3. That's the spirit of the Blackmar-Diemer Gambit — you're buying rapid development and central control at the cost of a pawn or two. After 1.d4 d5 2.e4 dxe4 3.f3, the engine evaluates the position at -0.82, meaning you are clearly worse in pure material terms. But chess isn't played on an evaluation bar: across 1,357,569 online games, White actually wins 50.6% of the time, narrowly outperforming Black's 46.1%. Below you'll find the most played replies, the critical mistakes to punish, and a concrete plan when Black accepts the challenge. Then hit the drill and practise.
Play the Blackmar-Diemer Gambit: dxe4 against the engine
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Now put these ideas into action. Play the position against the engine below and practise punishing Black's mistakes — no account needed.
Create a free account →What the Statistics Tell Us
The numbers are your friend here. From 1,357,569 games at this exact position, White's 50.6% win rate slightly edges Black's 46.1%, with 3.3% draws. That is remarkable because the engine says you are worse. The gap between raw evaluation and practical results is the soul of a gambit: most club players do not know how to handle White's attacking chances. The most common reply, by a huge margin, is exf3 — played in over a million games. When Black grabs the second pawn, White scores 51.4%. That is your best scenario. The second most popular move, Nf6, sees White's score dip to 48.5% — still perfectly playable. The worst scoring reply for White is e5 (38.0%), which is curious because the engine says e5 is Black's best move.
When Black Grabs the Pawn: exf3
This is the main line of the gambit, with over a million games in the database. Black takes the bait and plays 3…exf3. Now you have a choice of how to recapture, but the engine's preference is clear: the best line continues e5, opening lines against Black's king. After 4.e5 dxe5 5.Qxd1+ Kxd1, both sides have lost their queens and the kings are exposed. You will have piece activity and rapid development to compensate for the pawn deficit. The key idea is not to waste time recovering material — trust your lead in development and Black's awkward king position. The engine's recommendation puts maximum pressure on Black immediately.
The Two Mistakes You Must Punish
Black has two clearly losing moves that you should learn to recognise. The first is 3…Nc6 — an inaccuracy that costs Black about 0.5 pawns. Instead of defending or counterattacking, this natural developing move is just too slow. The engine says Black should have played e5 instead. The second is worse: 3…f5, which is labelled a full mistake, losing roughly 1.0 pawns. This move weakens the kingside and fails to address the centre. Against either of these, you should aim to play energetically — the engine's recommendation (e5) works beautifully here too, opening the centre before Black can castle or coordinate. Keep an eye out in the drill: if Black plays Nc6 or f5, you have a clear advantage.
Handling Black's Most Solid Replies
Besides grabbing the pawn, Black has a few other tries. Nf6 (155,816 games) develops and prepares to castle — White scores 48.5% here, which is your toughest test among the popular lines. Your plan remains the same: play e5 to challenge Black's centre, and be ready for an open fight. Bf5 (28,583 games) and f5 (23,220 games) both give White a healthy 49.6% score. Against Bf5, developing quickly and pushing for the centre is fine. Against f5 — which is actually a mistake, remember — you should be especially alert: it weakens the e6 square and gives you a target. In every case, the engine's recommended antidote is the same: push e5 and create chaos before Black can consolidate.
Results across 1,357,569 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| exf3 | 1,040,782 | 51.4% |
| Nf6 | 155,816 | 48.5% |
| Nc6 | 31,077 | 45.1% |
| e5 | 28,777 | 38.0% |
| Bf5 | 28,583 | 49.6% |
| f5 | 23,220 | 49.6% |
Frequently asked questions
Is the Blackmar-Diemer Gambit sound?
Objectively, Stockfish evaluates the position after 3.f3 at -0.82, meaning Black is clearly better with perfect play. However, in practice White wins 50.6% of online games at club level, suggesting it is a very practical weapon. Black must know what they are doing, and many do not.
What should I do if Black plays 3…exf3?
The engine's best response is 4.e5, opening the centre. The line continues 4…dxe5 5.Qxd1+ Kxd1, leaving both kings exposed. You trade queens but gain a lead in development and attacking chances against Black's stranded king.
Which Black moves are mistakes in this position?
3…Nc6 is an inaccuracy that costs Black about 0.5 pawns. Worse is 3…f5, a full mistake worth roughly 1.0 pawns. In both cases Black should have played 3…e5 instead. Punish these by playing aggressively in the centre.
How do I score best against 3…Nf6?
3…Nf6 is Black's second most popular move (155,816 games) and White scores 48.5%. Your plan is the same as in other lines: push e5 to challenge Black's centre and open lines. Focus on rapid development and piece activity to compensate for the pawn deficit.