The Queen check is supposed to weaken the black King's-side, but it also has some benefits for Black; f5 is strengthened and the g7 square can be a bolt-hole for the black Queen.
1. A chess tactic
is an unstoppable threat. Often you can Avoid, Block, Capture or Defend your way out of a
threat, but if you can't, you're probably on the receiving
end of a tactic.
There was a long-running argument on the UseNet rec.games.chess
newsgroups earlier this year,
basically around the idea that "chess is tactics, and club
players should study nothing but tactics" (or 90%
tactics).
More recently I got a video by Nigel Davies called Dirty
Tricks which offered a complete repertoire
for a club player. In every line, there was at least one huge
smelly pit for the opponent to fall into, or some other hope of
Pins are one of the first attacking ideas you learn about.
Here's some colourful examples you might not have seen before. Try
and find good examples of forks, skewers, discoveries and so on.
This long collection is the result of computer-searching a
database of games from the East Devon Congress this year (1999). I
had 222 games to analyse, courtesy of Ian George who had the
thankless task of bashing them all in: 111 from the Major section
THE ENGLISH SCHOOL OF ANALYSIS:
"The word "combination" means different things to different people."
"... I bid farewell to my readers in the hope that they have formed their own opinion as to the meaning of the word "combination"."
The Chess Combination from Philidor to Karpov
"(3) 'IS IT A SYSTEM...?'
... Ultimately, I suspect, this is a question about which the reader should form his own judgement by study of the original text."