1.  Kt-B5          P-Kt3
2.  Kt-Q3          P-R4

This is now necessary, because the square B3 is weak after P-Kt3 and the White Knight threatens to win the Rook’s pawn eventually with a check at B6.  For this reason Kt-Q 2, for instance, could not be played instead of the move in the text, because 3.  Kt-K5 would follow.  Black now cannot exchange, of course, otherwise the position would resolve itself to an easy end game win similar to the one in Diagram 56.  There would be nothing left but Kt-Kt1 to oppose the threat of Kt-B6ch, and this would get the Knight entirely out of play, so that White could queen the passed pawn easily after 4.  K-Kt6.

          3.  K-K5 P-B3

The King was threatening to enter via Q5 and B6.

          4.  K-B5 Kt-K3

If Black wishes to obviate the threat:  Kt-K5-B4, and plays P-Kt4, the White King goes to QB5 and wins all the pawns easily.  Therefore Black endeavours to sacrifice a pawn in order to exchange the two others, after which a draw could be forced by exchanging the Knight for the remaining White pawn.

5.  Kt-K5          P-B4
6.  Kt-B4          P-Kt4
7.  KtxP           P-B5

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

Diag. 84.

8.  K-K5          Kt-B4
9.  Kt-B6ch       K-B1!

Not K-B2, because of 10.  K-Q4, Kt-Q6; 11.  Kt-K5ch.

10.  Kt-R7

Here White had only considered the following answer: 

Kt-Q6ch; 11.  K-Q4, KtxKtP; 12.  KtxP, Kt-Q6; 13.  P-B5, Kt-Kt5; 14.  Kt-B3, Kt-B7ch:  15.  KxP, Kt-K6ch; 16.  K-B5, KtxP; 17.  P-R4, Kt-K2; 18.  Kt-Q5, Kt-B1; 19.  K-B6, K-K1; 20.  K-B7, Kt-R7; 21.  K-Kt7, and wins the Knight.

Black however draws, through a pretty combination: 

10. ...  P-Kt5 11.  K-Q4 P-B6 12.  K-B4 PxP 13.  KxP KtxP

and White cannot prevent the ultimate exchange of Kt for P. The last winning chance would have been:  10.  K-Q4!, Kt-Q; 11.  K-B3.  This is in any case the more plausible line, because now White can attack the pawns with both King and Knight, as both the Black pieces are away from the field of operations.  The sequel could be:  11.  KtxBP; 12.  P-R3 (Kt-R7 would only draw:  Kt-K7ch; 13.  K-Kt4, Kt-B8 14.  P-R3, Kt-R7ch; 15.  KxP, P-B6); 12.  Kt-Q4ch 13.  K-Q4, Kt-B5; 14.  K-K4 (Kt-R7 ?, Kt-K7ch!!; 15 K-K3, P-B6), Kt-Q6; 15.  P-Kt4, Kt-Kt7 16 Kt-Q4, and wins