The test of memory in a game form - a fine way with advantage to spend free time.
Before you stands a fairly easy task to remember and repeat marked with circles on the field.
The game has three difficulty levels (3x3, 4x4, 5x5).
During one of gameplay you have two tips and a limit on five errors.
Once you have mastered one of the levels, you can safely move on to more complex.
This simple game can improve the memory.