There is a book titled "Chess: 5334 Problems, Combinations and Games".
"Chess analyzes more than 5,000 unique instructional situations, many taken from real matches, including 306 problems for checkmate in one move, 3,412 mates in two moves, 744 mates in three moves, 600 miniature games, 144 simple endgames, and 128 tournament game combinations."
Mate in one and two problems aren't usually too difficult to solve with experience. But my question is, does the difficulty of the problem matter? Isn't pattern recognition a crucial part of studying chess? I feel like I can get a lot more from simple mate in one (or two) problems then just solving them, and going to the next problem right away.
For example, these simple situations seem to be really beneficial, if I think about them as positions I want to achieve in real games, and if I try to analyze the position.
Or maybe I am dead wrong about this, and I should concentrate on doing problems, that are difficult to solve.