There are several methods, which can double the size of an existing magic square. With small changes, basic magic squares of odd and even order can be processed by these methods.
|Strachey (Benson-Jacoby Variant)|
|Benson - Jacoby|
|Widdis - Richter|
|Candy (Variant with d≠1)|
|Candy (Variant with d1 and d2)|