Tactics : Discovered Attack
In chess, there are different tactical motifs such as interference, double attack, forks, back rank mate, removing the guard, clearance....
In this post, I will talk about discovered attacks. The most frequent type of discovered attack is the discovered check. Look at this simple example from The Petrov Defence :
Puzzle 1 :
Evaluate this position, black to move( The right evaluation will be at the end of the post) :
Puzzle 2 :
Puzzle 4:
Puzzle 5 :
Puzzle 6 :
Puzzle 7 :
Puzzle 9 :
Puzzle 10 :
Puzzle 12:
Puzzle 13:
Answer to puzzle # 2 :
Please write in the comments which puzzle was the hardest 
