Chessy
Play the Semi-Tarrasch Defense: Bg5 as Black
The Semi-Tarrasch Defense is a solid, dynamic answer to 1.d4. After 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5 cxd4, you have already equalised. Stockfish evaluates the position at -0.11, a negligible edge for Black — meaning you are essentially equal out of the opening. Across over 128,000 games from this exact position, Black actually outscores White 47.7% to 47.3%, so you are in excellent company. The only real question now is: which piece do you want White to recapture with on d4, and how do you follow up? The drill below will test your readiness.
Play the Semi-Tarrasch Defense: Bg5 against the engine
Free, no signup — you play black, the engine adapts to your level.
Set up the position and test your reactions against the engine. The drill will challenge you against White's best replies and help you punish the common blunder
Create a free account →The Critical Moment: Which d4 Recapture?
White has just played 5...cxd4 — you traded your c-pawn for White's d-pawn, opening the centre. Now White must decide how to take back on d4. The engine's top choice is Qxd4, which leads to the line 6.Qxd4 Nc6 7.Bxf6 gxf6 — a sharp structure where White's bishop pair is traded for doubled f-pawns on your side. That position is your target: you will have active piece play and an open g-file to compensate for the pawn structure. In practice, however, White most often plays Nxd4 (over 97,000 games), and you score just as well against it. The key is to know your follow-up regardless of which recapture White chooses.
What the Statistics Reveal About Your Chances
From this position, the numbers are remarkably balanced across the board. Here is a breakdown of the most-played moves and how White scores from them: - Nxd4 (97,334 games): White scores 47.8% — essentially even. - Qxd4 (27,227 games): White scores 46.5% — you actually have a tiny edge. - Bxf6 (2,144 games): White scores 49.8% — nearly a coin flip. - cxd5 (528 games): White scores 32.0% — this is already a blunder. - e3 (462 games): White scores 26.2% — a blunder. - Nb5 (259 games): White scores 36.3% — a clear mistake. The takeaway? Your position is so sound that any deviation from the best recapture quickly tilts things in your favour.
Punish White's Common Mistakes
The FACTS show three clear errors White can make in this exact position. Here is what you need to know to capitalise on each one: - cxd5 (a blunder losing ~3.6 pawns): White opens the d-file and gives you a free tempo. You should have no trouble converting this advantage. - e3 (a blunder losing ~4.2 pawns): A passive move that wastes time and blocks White's own bishop. Your development and central control will be crushing. - Nb5 (a mistake losing ~1.6 pawns): This knight move is premature and leaves White's position loose. Develop naturally and you will be significantly better. Whenever White plays something other than Qxd4 or Nxd4, be alert — you are already winning or close to it.
Your Typical Plan After the Correct Replies
Against the two main replies — 6.Nxd4 or 6.Qxd4 — your plan is similar: develop quickly and fight for the centre. After 6.Nxd4, you can play Nc6, challenging the knight on d4 and keeping the tension. After 6.Qxd4 Nc6, White's 7.Bxf6 gxf6 gives you the bishop pair and an open g-file for your rook — a dynamic imbalance that suits active players. In both cases, aim to castle kingside, complete your development with ...Bd6 or ...Be7, and then decide whether to target White's centre with ...d4 or ...e5. Your position is flexible and sound; trust your pieces.
Results across 128,135 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nxd4 | 97,334 | 47.8% |
| Qxd4 | 27,227 | 46.5% |
| Bxf6 | 2,144 | 49.8% |
| cxd5 | 528 | 32.0% |
| e3 | 462 | 26.2% |
| Nb5 | 259 | 36.3% |
Frequently asked questions
Is the Semi-Tarrasch Defense a good opening for beginners?
Yes. It is a principled opening that fights for the centre without taking extreme risks. After 5.Bg5 cxd4 you reach an equal position by move 5, and the plans are straightforward: develop, challenge the centre, and castle. You do not need to memorise long forced lines.
Why does Black score so well when White plays cxd5 or e3?
Both moves are blunders that lose material or tempo. cxd5 opens the d-file prematurely and drops a pawn, while e3 is passive and wastes a move. Stockfish rates each as losing multiple pawns worth of advantage, and the statistics confirm it — White scores only 32% and 26% respectively in those lines.
Should I always trade bishops on f6 with ...gxf6?
Only if White plays 6.Qxd4 followed by 7.Bxf6. In that specific line, the doubled f-pawns are a fair trade for the bishop pair and open g-file. If White recaptures with 6.Nxd4 instead, you should not look for a bishop trade — just develop naturally with ...Nc6 and fight for the centre.
What is the main difference between 6.Nxd4 and 6.Qxd4 for Black?
After 6.Nxd4, you play ...Nc6 and the knight on d4 is a target. After 6.Qxd4 Nc6, the queen on d4 becomes the target, and White's best follow-up is 7.Bxf6 gxf6 — entering a different pawn structure. Both are equal, but the resulting middlegames feel different. The drill will prepare you for both.
How many games feature the Semi-Tarrasch Defense: Bg5?
Over 128K Lichess games have reached the Semi-Tarrasch Defense: Bg5 position. White wins 47.3%, Black wins 47.7%, with 5.0% draws — based on real rated games.