Your second move gives the name to this opening, which is one of the
most popular and instructive of all the various methods of commencing
the game. The Kt., it will be observed, at once attacks the adverse
Pawn, and the defence recommended by the best authors and the leading
players of Europe, is for Black to reply 2. Q's Kt. to B's 3d. He has,
however, many other ways of playing, and as the examination of these
comparatively simple variations will serve to prepare you for the more
complex and elaborate combinations of the best defences, it will be
advisable to consider them previously. In the first place, then, Black
may sustain his Pawn by playing--

1. P. to K. B's 3d.
2. K's B. to Q's 3d.
3. Q. to K. B's 3d.
4. P. to Q's 3d.

or, in the second place, he may leave it unprotected, and play--

5. K's Kt. to B's 3d.
6. K's B. to Q. B's 4th.
7. P. to K. B's 4th.
8. P. to Q's 4th.

He has thus eight different modes of play at his command, besides the
move of Q's Kt. to B's 3d, in answer to your second move of
K's Kt. to B's 3d. Each of these will form the subject of a separate
game.