18. ...             Kt-B4
19.  QR-Q1          Kt-Q3!
20.  BxKt           Kt-Kt4

avoiding an isolated pawn in a subtle manner.

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

Diag. 104

21.  Q-Kt4 RxB 22.  Kt-Q3 B-Kt5 23.  QKt-K5 P-R4 24.  KtxB PxKt 25.  Kt-R4

Kt-K5 would be answered by KR-Q1; 26.  KtxP, KtxP threatening both Kt-B6ch and Kt-B7.  If White stops both threats with Q-B3, Kt-K7ch wins.

25. ...              KR-Q1
26.  R-K7            Q-Q3

Now Black foregoes his well-earned advantage.  He overlooks White’s subtle move 28.  P-R6. 26 Q-B1 was indicated.  White’s Queen’s Pawn could not escape, and there was time to dislodge the White Rook from the seventh by R-Q2, e g. 26. ...  Q-B1; 27.  Q-Kt3!, QR-Q2; 28.  Q-K3, RxR; 29.  QxR, KtxP.

27.  QxQ KtxQ 28.  P-R6!  PxP 29.  RxRP Kt-Kt4 30.  RxRP KtxP 31.  K-B1 P-Kt4 32.  Kt-Kt2 Kt-B6 33.  RxR PxR!

The pawn threatens to queen.  Taking the Rook’s pawn would not be so good, as it would displace the Knight.  White would not only regain the pawn easily with Kt-K3, but would also get his King into play.

          34.  Kt-K1 R-K1

Here R-QB1 affords winning possibilities for Black.  On account of the threat of R-B8, the exchange of Knights by White would be forced, and his game would have been badly cramped by the Black KBP, e.g. 34. ...  R-QB1; 35.  KtxKt, PxKt; 36.  R-R1 (K-K1?, R-B7; 37.  R-Q6, R-K7ch; 38.  K-B1, RxP; 39.  K-K1, R-K7ch; 40.  K-B1, R-K4), R-Kt1; 37.  R-Kt1, R-Kt6.  After the move in the text the game is drawn.

35.  KtxKt          PxKt
36.  R-Q6           R-QB1

There is nothing in this move, as the Black passed pawn is now attacked.

37.  K-K1 R-K1ch
38.  K-B1 R-QB1
Drawn.

Game No. 5

White:  R. C. Griffith.  Black:  W. H. Gunston.

Giuoco Piano.

1.  P-K4 P-K4 2.  Kt-KB3 Kt-QB3 3.  B-B4 B-B4 4.  P-B3 Kt-B3 5.  P-Q3

P-Q4 would seem to be the logical consequence of P-B3, and therefore preferable.  After the text move Black will sooner or later be able to enforce the advance of his own pawn to Q4, and his pieces will then have the greater mobility.