Mating patterns 1

Mating combinations often come as the crown to a successful attack. You must recognize the underlying mating pattern in good time in order to force the win.

The following positions are puzzles and you must try to solve them yourself. It is very important to consider the active moves: moves which attack or capture something, moves which create threats of mate or which give check.

When calculating variations priority must be given to forcing lines.

So these you must know these mating patterns. These were easy. This was the part 1. Part 2 will be posted soon.