Should Black play PxP at once, White would exchange Queens, release the pin, and win the pawn.
| 5. QxB | PxP |
| 6. B-QB4 |
White has now two pieces more in play than Black, instead of only one, and the mobility of the White Queen, which Black himself has brought out, begins to have a threatening effect on Black’s game.
| 6. … | Kt-KB3 |
| 7. Q-QKt3 | Q-K2 |
Black cannot cover his King’s Bishop’s Pawn with Q-Q2 because 8. QxP wins the Rook, whilst now Black could play 8. … Q-Kt5ch in reply, forcing the exchange of Queens. The text move, which is forced, blocks the Bishop, and at the same time prevents the development of the King’s Rook, all of which is the direct consequence of the loss of one move.
| 8. Kt-B3 |
White rightly disdains the gain of the Knight’s Pawn, but prevents the exchange of Queens in developing a piece. He proves the superiority of his position much more convincingly in that way. Black must now lose yet another move to protect his Knight’s Pawn.
| 8. … | P-B3 |
| 9. B-KKt5 | P-Kt4 |
Black must try to develop his Queen’s Knight at last. He cannot play QKt-Q2 at once, since his Knight’s Pawn would again be unprotected; therefore he plays the move in the text, probably thinking that now White also must lose a move to withdraw his Bishop. But in view of the fact that Black’s game is wholly undeveloped, and that he plays practically several pieces down, White sacrifices his Knight for two pawns: he foresees the position which occurs a few moves later, when Black is hemmed in on all sides.
| 10. KtxP | PxKt |
| 11. BxKtPch | QKt-Q2 |
| 12. Castles QR | R-Q1 |