No. 20.

             BLACK.

+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | Q | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | K | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| P*| | | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+
| | K*| | | | | | |
+—–­+—–­+—–­+—–­+—–­+—–­+—–­+—–­+

                          WHITE.

QUEEN AGAINST QUEEN AND PAWN.

In cases of this kind the game is usually drawn without difficulty, and most generally so by means of a perpetual check, though the same object may sometimes be attained by an exchange of Queens, when your King is able to stop the Pawn.  When, however, the Pawn is advanced to its 7th square, and more particularly if defended by its King, the task is one of more difficulty, and many instructive situations occur where the Pawn may be Queened and the game therefore won.  We subjoin an example or two of each kind, by way of illustration.

Diagram 15.

                 WHITE.  BLACK.
       1.  Q. to K. Kt’s 4th. (ch.) 1.  Q. to K. Kt’s 6th.
       2.  Q. to K’s 4th. (ch.) 2.  K. to Kt’s 8th.
       3.  Q. to Q’s 4th. 3.  K. to R’s 7th.
       4.  Q. to K. R’s 8th. (ch.) 4.  Q. to R’s 6th.
       5.  Q. to K’s 5th. (ch.) 5.  K. to Kt’s 8th.
       6.  Q. to Kt’s 5th. (ch.) 6.  Q. to Kt’s 7th.
       7.  Q. to K’s 3d. 
          White will always be able to make a drawn game.

Diagram 16.

WHITE.  BLACK.
1.  Q. to her Kt’s 4th.
2.  K. moves. 2.  K. to Q’s 8th.
3.  Q. to Q. R’s sq. (ch.) 3.  P. Queens. 
And wins.

Diagram 17.

WHITE.  BLACK.
1.  P. Queens (ch.) 1.  K. to K. B’s 5th.
2.  Q. to K. B’s 8th. (ch.) 2.  K. to his 5th.
3.  Q. to K’s 7th. (ch.) 3.  K. to K. B’s 6th.
4.  Q. to K. B’s 6th. (ch.) 4.  K. to his 5th.
5.  Q. to K’s 6th. (ch.) 5.  K. to K. B’s 6th.
6.  Q. to K. B’s 5th. (ch.) 6.  K. to his 7th.
7.  Q. to her 3d. (ch.)
Then forces an exchange of Queens, and wins with
his remaining Pawn.

QUEEN AGAINST PAWN.

In all ordinary situations, the Queen of course easily stops a single Pawn and wins against it; if, however, the latter has reached its 7th square, and has the support of its King, there are instances in which the game must be drawn.  Our first position (see Diagram 18), will show the method of winning, and we shall afterwards point out the exceptions.