A Pawn may generally be sacrificed in the opening with advantage when it accomplishes two object I,e, when it brings an undeveloped piece into play and at the same time keeps an opponent's piece out of play. This applies especially to Gambit attacks. Free Chess Moves Video Course Here

There are other ends which maybe substituted for that of keeping an opponent's piece out of play, such as to facilitate access to his king.

Weigh you advantages and disadvantages. When you have an opportunity of making a good move and you see before you another move which permit several good continuation, select the latter. Your adversary will most probably hasten to stop your good move at the risk of a bad game. Free Chess Moves Video Course Here

This the principle upon which the finest gambit attacks such as the Muzio and the Allgaier, are founded and it may be summed up in the maxim retain as much freedom of action as possible. Free Chess Moves Video Course Here

When you cannot see your way to an attacking move play a development move. When you cannot make a development move , play. If possible, a retaining move that will check your opponent's development.

When your opponent shows a disposition to play a backward or defensive game do not play a forward game. Keep your pieces together play steadily and look out for weak spots.

If he pushes forward rapidly in the center try to get round him. If he advances Pawns on both sides try to cut his game in two. If he advances rapidly on the flank, wait till he has fairly committed himself in the direction, and then attack him on the other side. This Assumes that your game is not so far committed as to leave you no option. Free Chess Moves Video Course Here

These maxims may appear obvious The difficulty is however to recognize their applicability in the position under your eyes when playing. This is the point which requires careful attention.