Semi-Classical Variation

The Semi-Classical Variation of the King's Indian Defense copies the piece placement of the Classical Variation, with Nf3 and Be2, but White advances the e-pawn only one square with 5. e3. The c4–d4–e3 chain is compact and offers Black no forward target. White also sidesteps the heavy theory that follows 5. e4, at the cost of giving Black a free hand in the center. Black can prepare ...e5 or ...c5 without facing a pawn on e4. The engine rates the position as roughly balanced, and results are nearly even.

The most common reply is 6...Nbd7, preparing ...e5. After 7. O-O e5, White can release the tension with 8. dxe5 dxe5, the Exchange Variation, which opens the d-file and simplifies the structure. The alternative is 8. b4, the Queenside Storm Line, which gains space on the wing where White's play usually lies in the King's Indian. Other choices are 6...Nc6, the Hollywood Variation, which also supports ...e5, and the immediate 6...c5. A further option is 6...c6, known as the Benoni Variation, a flexible move that leaves Black's choice of central break open.