This puzzle is best represented by 8 long horizontal blocks and 8 long vertical blocks; and consist of 8 small boxes, which give the total of 64 boxes.
All 8 long horizontal blocks and 8 long vertical blocks must contain all of the numbers from 1 to 8 inclusively without repeating any thereof - RULE ONE.
The main puzzle with 64 boxes is also represented by 4 sub-puzzles which are called Quarters and each quarter is made up of 4x4 short blocks.
For RULE TWO in each of the 4 quarters, all the blocks with 4 small boxes must be added up to the sum of 18 (Eighteen) not only horizontally and vertically but diagonally as well.
This puzzle involving logical thinking which lead to better decision making. Improving the mental strength for the youth and acting as a stimulation of the brain cells for the elderly players that might prevent them from the deterioration of memory and functioning of the brain.
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