Not the most favoured move, but a perfectly natural developing one, and consequently it cannot be bad.
| 4 ........ | P × P |
P - Q B 4 is generally played in this case instead of the text move.
| 5. Kt × P | Q Kt - Q 2 | |
| 6. Kt × Kt ch | Kt × Kt | |
| 7. Kt - B 3 | B - K 2 |
| 8. Q - K 2 |
This is played to prevent P - Q Kt 3, followed by B - Kt 2, which is the general form of development for Black in this variation. If Black now plays 8...P - Q Kt 3; 9. B - Kt 5 ch, B - Q 2; 10. Kt - K 5 and White obtains a considerable advantage in position.
| 8. ........ | O - O | |
| 9. B - K Kt 5 | P - K R 3 |
Of course Black could not play P - Q Kt 3 because of B × Kt, followed by Q - K 4.