17.

Bl. The Q. Rook at its K. B. sq.

Wh. The King castles with his Q. Rook.

18.

Bl. The Q. B. Pawn 2 sq.

Wh. The K. Pawn one sq. (1)

battering upon her adversary's king's rook's pawn. The pawn advancing afterwards will become dangerous to your adversary's king.

(7) In order to comprehend this move, see Rule G. 3. and then observe, that your king's pawn not being in the line with his comrades, your adversary has pushed his queen's bishop's pawn two squares; first, to engage you to push that of your queen forwards, according to Rule A. 6, which, if you did, would be stopped by that of his queen's; and thus leaving behind that of your king, would render it useless: secondly, to hinder your king's bishop battering upon his king's rook's pawn; therefore it is best to push your king's pawn upon his rook, and sacrifice it; because then your adversary by taking it, and he cannot well do otherwise, opens a free passage to your queen's pawn, which you are to ad-vance immediately, and sustain in case of need with your other pawns, in order to make a queen with it, or draw some other considerable advantage from it. It is true, that his queen's pawn (now become his king's) appears to have the same advantage of having no opposition from your pawns to make a queen; however, the difference is great, because his pawn being entirely se

N

19.

Bl. The Q. Pawn takes the Pawn.
Wh. The Q. Pawn one sq.

20.

Bl. The Bishop at his Q. B. 2d sq.
Wh. The Knight at his K. 4th sq. (m)

21.

Bl. The K. Rook at the wh. K. B. 3d sq. Wh. The Queen at her K. Kt. 2d sq.

22

Bl. The Queen at her K. B. 2d sq. (n)
Wh. The Knight at the bl. K. Kt. 4th sq.

parated from his comrades, will always be in danger of being captured in his road from a multitude of your pieces all at war against it. To know well how to make use of these moves at proper times and vary from established rules, one must be already a good player.

(m) It was necessary to play that knight in order to stop his king's pawn; the more so, because this very pawn, in its present situation, stops the passage of his own bishop, and even of his knight.

(n) In order afterwards to give you check, if he had played his king's rook's pawn to hinder the attack of your knight, you must have attacked his bishop and his queen with your queen's pawn; and in this case he would have been forced to take your pawn, and you should have taken his bishop with your knight, which he could not have taken with his queen, because she would have been lost by your bishop checking his king, leaving her in check by your rook.

23.

Bl. The Queen gives check.

Wh. The King at his Q. Kt. sq.

24.

Bl. The Rook takes the Bishop. (0)
Wh. The Rook takes the Rook.

25.

Bl. The Queen at her K. B. 4th sq.
Wh. The Queen at her K. 4th sq. (p)

26.

Bl. The Queen takes the Queen.
Wh. The Knight takes the Queen.

27.

Bl. The Rook at the wh. K. B. 4th sq.
Wh The Knight at the bl. K. Kt. 4th sq.

28.

Bl. The Q. B. Pawn one sq.

Wh. The Q. Rook at her K. Kt. 3d sq.

(0) First, to save his king's rook's pawn, and because your bishop proves incommodious to him; and secondly, to put his queen upon the rook that covers your king.

(p) Having a rook against a bishop at the end of a party, it is your advantage to change queens, particularly as his is at present troublesome to you where he has just played her; you force him to change, if he will save his being check-mated.

29.

Bl. The Knight at his Q. B. 4th sq.
Wh. The Knight at the bl. K. 3d sq.

30.

Bl. The Knight takes the Knight.
Wh. The Pawn takes the Knight.

31.

Bl. The Rook at his K. B. 3d sq.
Wh. The K. Rook at its Q. sq. (9)

32.

Bl. The Rook takes the Pawn.

Wh. The K. Rook at the bl. Q. 2d must win the game. (r)

FIRST BACK GAME.

sq. and

Bl. The Q. Pawn takes the Pawn. (a)
Wh. The K. B. Pawn takes the Pawn.

(9) See Rule C. 18.

(r) He could not hinder you from doubling your rooks, unless he had sacrifice his bishop, or let you make a queen with your pawn.

(a) If he had taken your king's bishop's pawn instead of this, you must have pushed your king's pawn upon his knight, and afterwards taken his pawn with your queen's bishop.

5.

Bl. The K. Knight at the wh. K. Kt. 4th
Wh. The Q. Pawn one sq.

6.

Bl. The K. B. Pawn 2 sq.

Wh. The K. Bishop at his Q. B. 4th sq.

7.

Bl. The Q. B. Pawn 2 sq.

Wh. The Q. B. Pawn one sq.

8.

Bl. The Q. Knight at his B. 3d sq. •Wh. The K. Knight at his K. 2d sq.

9.

Bl. The K. R. Pawn 2

sq. (b)

Wh. The K. R. Pawn one sq.

10.

Bl. The K. Knight at his R. 3d sq.
Wh. The King castles.

11.

Bl. The Q. Knight at his R. 4th sq.
Wh. The K. Bishop gives check.

sq.

(b) He pushes his pawn two squares to avoid having a double pawn upon his king's rook's line, which by pushing your king's rook's pawn upon his knight, he could not possibly avoid; and your taking it afterwards with your queen's bishop, would have given him a very bad

game.