4. ...           PxP
5.  P-B3         Kt-QB3

Black cannot put off White’s P-Q4 by B-KKt5, for White can give a check with the Queen and unpin the Knight.

          6.  P-QKt4

The object of this move is not clear, as P-Kt5 does not win a pawn (Kt-R4; 8.  KtxP; 9.  Q-R5ch).  It does not promote development either, and only compromises the QBP and QKtP.

6. ...             B-Kt3
7.  B-Kt5          Kt-B3

This is aimed at the White King’s pawn, which is deprived of its natural support by the QKt.  In this position Black does well to attack White’s KP rather than to defend his own, because an open King’s file can only benefit him.  Being able to castle, he can occupy the file with his Rook before White has time to bring his King into safety.

          8.  KtxP

It would have been better to protect the pawn by Q-K2 or P-Q3.

          8. ...  Castles!

---------------------------------------
8 | #R |    | #B | #Q |    | #R | #K |    |
|---------------------------------------|
7 | #P | #P | #P |    |    | #P | #P | #P |
|---------------------------------------|
6 |    | #B |#Kt |    |    |#Kt |    |    |
|---------------------------------------|
5 |    | ^B |    |    | ^Kt|    |    |    |
|---------------------------------------|
4 |    | ^P |    |    | ^P |    |    |    |
|---------------------------------------|
3 |    |    | ^P |    |    |    |    |    |
|---------------------------------------|
2 | ^P |    |    | ^P |    |    | ^P | ^P |
|---------------------------------------|
1 | ^R | ^Kt| ^B | ^Q | ^K |    |    | ^R |
---------------------------------------
A    B    C    D    E    F    G    H

Diag. 100

The beginning of a brilliant attack.  Whether White exchanges the Bishop or the Knight, he is overwhelmed.

9.  KtxKt

After 9.  BxKt, PxB; 10.  KtxP, Q-K1 wins; 10.  P-Q4 would also lose because Black gains two pawns after KtxP; 11.  O-O, KtxP.  It is interesting to note how speedily the weakness at White’s QB3 is brought to book.

9. ...                PxKt
10.  BxP               KtxP!!

Now White can neither take the Kt nor the R. In the first case Q-R5ch forces mate very soon, in the second B-B7ch, followed by B-Kt5ch or B-R3ch, wins the Queen.

11.  P-Q4 Q-B3! 12.  BxKt Q-R5ch 13.  K-Q2 QxB 14.  Q-B3 Q-R5! 15.  P-Kt3

Not QxR, because of Q-B7ch and the loss of the Queen by a discovered check by the Bishop.

Q-Kt4ch
16.  Q-K3           Q-Q4
17.  R-K1           B-Kt5
18.  K-B2           P-QR4

Such is the price to pay for premature advances.

19.  PxP            RxP
20.  B-R3           P-QB4

Black shatters White’s pawn position, and his Bishops and Rooks have full play along open files and diagonals.

          21.  PxP RxB!
          22.  KtxR