King's Indian Attack: Omega-Delta Gambit — Black to move

The big idea here is simple: White has to react to your central presence, and passive moves are punished. In the database, the most played continuation is Bg2, but that is also marked as a mistake. The engine wants you to meet this position with Nxe5, which keeps the initiative and leads straight into the line given in the facts. As Black, you are not aiming for a quiet setup; you are trying to make White prove they can justify the kingside fianchetto against your central advance.

The results at this exact position are not in your favour. Across 128,208 games, White scores 53.1%, draws 3.9%, and Black wins 43.1%. That tells you the position tends to reward White if you drift into normal-looking play. The practical lesson is not to hope for equality by default. You need to know the engine’s choice and treat the position as one where White already has a clear edge unless you respond accurately.

The database gives you a clear map of what White usually tries. Bg2 is the most common reply with 49,601 games, and it scores 48.5% for White. Nxe5 is played very often too, with 47,250 games, and White scores 59.0% there. Other tries include d3 with 26,013 games, d4 with 2,609 games, e3 with 565 games, and c4 with 379 games. If you are learning this line as Black, these are the moves the drill should train you to meet without hesitation.

Three moves are flagged as mistakes in this position: Bg2, d3, and d4. The note beside each one is the same theme: they all lose serious material or time compared with the engine’s choice of Nxe5. That is why this opening is so useful for training. You are not memorising a long variation tree; you are learning which decisions are too slow and which move keeps White under pressure. If White hesitates, you should be ready to take control of the centre immediately.