If Q-B2 White forces the exchange of Queens with the following combination:  41.  Q-Q2, R-B7; 42.  Q-Q3, R-B8ch; 43.  K-Kt2, with a threat of Kt-B6ch and Q-R7 mate.  Black therefore would have to play Q-B7ch, etc., as in the game.

41.  KxQ R-B7ch 42.  K-R1 RxP 43.  R-R1 P-Kt4 44.  Kt-B6ch K-Kt2 45.  Kt-K4 K-Kt3 46.  Kt-Q6 P-QR4

We have now a position with a forced move.  If the White Knight moves, there follows K-B4-B5, etc.  Therefore White gives up his R P voluntarily.

47.  R-QB1         RxP
48.  Kt-B4         Kt-Kt4

Now Kt-B6 and RxP mate are threatened.

49.  Kt-K5ch K-Kt2 50.  Kt-Kt4 R-K7 51.  R-B5 R-K8ch 52.  K-Kt2 Kt-R6 53.  R-B7ch K-B1 54.  R-B1 R-K7ch 55.  K-R1 Kt-B7ch 56.  K-Kt1 Kt-R6ch

Black again appears to be short of time.

57.  K-R1 Kt-Kt4 58.  R-B5 R-K8ch 59.  K-Kt2 Kt-R6 60.  R-B1 R-K7ch

Now, after the sixtieth move Black has again plenty of time, and can prepare the final combination at leisure.

61.  K-R1 R-K3
62.  R-R1 K-Kt2
63.  R-QB1 K-Kt3
64.  R-B6 RxR
65.  Kt-K5ch K-B4
66.  KtxR P-R4
67.  Kt-Q4ch K-K4
68.  Kt-K2 Kt-B7ch
69.  K-Kt2 Kt-Q5

        Resigns.

Game no. 39.

White:  Rotlewi.  Black:  Rubinstein

Queen’s Gambit Declined.

1.  P-Q4 P-Q4 2.  Kt-KB3 P-K3 3.  P-K3 P-QB4 4.  P-B4 Kt-QB3 5.  Kt-B3 Kt-B3 6.  QPxP BxP 7.  P-QR3 P-QR3 8.  P-QKt4 B-Q3 9.  B-Kt2 Castles

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

Diag. 155

10.  Q-Q2

White cannot win the QP by 10.  PxP, PxP; 11.  KtxP, KtxKt; 12.  QxKt, because BxPch wins the Queen.  The text move is played with the intention of bringing up the QR for the attack on the QP.  However, it would have been more correct to fix the object of attack first by PxP, as Black could now cross White’s intentions by playing PxP, after which he would sooner or later gain a move by occupying the Q file with a Rook, and forcing the White Queen to retreat.