I'm fairly new to the game of chess. I've yet to win a game against my friend who taught me. I'm getting better at seeing things and defending myself, but my attacks on the other side's king really bite. Any advice/offensive tactics anyone wants to offer? Thanks.
There's nothing wrong with focusing on defense for a while, but of course you want to be able to exploit the areas where your opponent gives you ground, and that requires good offense. Look for basic chess tactics (forks, pins, skewers, discoveries), structural weaknesses to exploit (outposts for knights that cannot be attacked by pawns, so the worst that can happen is a more or less even trade), and even sacrifices.
A good tactic can be to sacrifice a knight or bishop for two pawns around the opponent's king. You lose a pawn in some sense, but often you can get a pretty strong attack against the enemy king. Of course, you have to make sure that you will actually have an attack - otherwise, you just lose a pawn for nothing.
Unless you have a
very strong attack, always make sure your king is safe before launching an attack to force mate or a heavy loss of material. Look out for in-between moves by your opponent (especially check or threats to your queen) that could extinguish your attack.
Try the daily chess problems at
www.chess.com and read through some of the sections at
www.chesstactics.org (a great site). The computer at
www.chess.com is pretty decent too - a good no pressure way to practice, though its openings are very strange.
Most of all, enjoy yourself. If you ever would be interested in a correspondence game (by email), I'd be happy to try it out and give pointers. I've never done it myself, but it could be fun.
Brendan