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General information 8x8 grids group 6-10
In the foregoing groups the quadrants consist of 4 times 4 digits. In group 6-10 the quadrants consist
of 2 times 8 digits. How many 8x8 H-, K-, and combined HK-grids are possible?
Fill the top left quadrant after H1, H2, H3, H4, H5 or H6. In the example H4 has been chosen.
H4
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5
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In the top right quadrant there are 4 options, 2 with a H-structure, and 2 with a K-structure.
H4 K4 H K
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1
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1
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4
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Independent of the above options, for the down left quadrant 8 options are possible, all with
H-structure:
H4 H H H
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5
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0
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2
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5
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H3 H H H
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0
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5
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2
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7
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1
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1
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7
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5
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0
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The down right quadrant follows automatically, and has necessarily the structure of the upper
right quadrant. Below an example of both a HHHH- and a HKHK-grid is given:
H4 H
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0
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5
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2
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7
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2
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7
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0
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5
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6
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3
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4
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1
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4
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1
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6
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3
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5
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7
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1
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4
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1
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6
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3
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2
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5
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1
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4
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6
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3
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1
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4
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0
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5
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7
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2
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H4 K
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0
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5
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2
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1
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1
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1
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1
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1
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3
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5
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1
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7
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5
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0
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7
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0
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5
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2
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From above reasoning it will be clear that there are 16 H4HHH and 16 H4KHK-grids.
If you start with a K-quadrant in the upper left, then you get an analogous reasoning. For
example starting with K4 as the upper left quadrant, there are the following options for the
top right quadrant:
K4 H K H4
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0
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7
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2
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5
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2
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0
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1
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4
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3
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1
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4
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Independent of the above options, for the down left quadrant there are 8 options, all with K-
structure:
K4 K K K
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1
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1
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1
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1
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1
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1
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1
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1
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6
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K3 K K K
And again there is the possibility to compose 16 K4KKK- and 16 K4HKH-grids.
As there are 6 H- or K-quadrants to start with, there are 6 x 16 = 96 (homogeneous) HHHH
grids, 96 (homogeneous) KKKK grids, 96 (mixed) HKHK grids and 96 (mixed) KHKH grids.
The table of combinations shows that the grids can be combined in 5 different ways:
Group 6 : HHHH/H*H*H*H*,
Group 7 : KKKK/K*K*K*K*,
Group 8 : HHHH/K*K*K*K*,
Group 9 : 4 variants of H/M where H stands for homogeneous, and M for mixed grid,
Group10: 3 variants of M/M.
Illustration group 6
In the previous general information group 6-10 the following row grid has been constructed:
H4 (row grid)
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5
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7
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2
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7
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5
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6
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3
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4
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1
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4
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1
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6
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3
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5
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0
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7
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2
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7
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2
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5
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0
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3
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6
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1
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4
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1
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4
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3
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6
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4
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1
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6
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3
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6
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3
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4
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1
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2
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7
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0
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5
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0
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5
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2
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7
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1
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4
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3
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6
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3
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6
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1
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4
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7
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2
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5
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0
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5
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0
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7
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2
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Now we are going to construct a matching column-grid with H-structure.
Fill the top left quadrant after H1*, H2*, H3*, H4*, H5* or H6*. In the example H5* has been
chosen.
H5* (column grid), step 1
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The 5th row can only be filled with 4-2-7-1 (the alternative 0-6-3-5 would immediately lead to
double pairings when composing the final magic square, just try!). Maintaining the H*-structure
the quadrant can only be filled as follows:
H5* (column grid), step 2
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0
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6
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3
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5
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3
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5
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0
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6
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4
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2
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7
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1
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7
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1
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4
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2
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4
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7
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1
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7
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0
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5
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6
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Important: Note that filling the down left quadrant after the K*-structure would lead
immediately lead to doubling when composing the final magic square (just try!).
In the 5th column only 0-3-4-7 and 2-1-6-5 are possible. In the example 2-1-6-5 has been chosen.
With both options you can finish the upper right quadrant, but only when maintaining the H*-structure.
The down right quadrant follows automatically, and has necessarily also the H*-structure.
H5* (column grid), step 3
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0
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6
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3
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5
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2
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4
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1
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7
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3
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5
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0
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6
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1
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7
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2
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4
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4
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2
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7
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1
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6
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0
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5
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3
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7
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1
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4
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2
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5
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3
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6
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0
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4
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2
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7
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1
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7
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1
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4
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2
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0
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6
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3
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5
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3
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5
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0
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6
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H5* (column grid), step 4
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0
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6
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3
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5
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2
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4
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1
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7
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3
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5
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0
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6
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1
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7
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2
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4
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4
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2
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7
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1
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6
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0
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5
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3
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7
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1
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4
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2
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5
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3
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6
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0
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4
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2
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7
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1
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6
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0
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5
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3
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7
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1
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4
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2
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5
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3
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6
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0
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0
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6
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3
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5
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2
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4
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1
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7
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3
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5
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0
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6
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1
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7
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2
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4
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Starting the top left quadrant with the other H*-fillings leads also to matching column grids. So, in
total there are 6 (H1* …..H6*) x 2 (see options of step 3) = 12 different column grids.
Below you see the final magic square composed with the above grids:
1x digit from row grid +1 + 8x digit from column grid = most perfect 8x8 magic square
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0
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5
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2
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7
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2
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7
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0
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5
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0
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6
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3
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5
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2
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4
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1
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7
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1
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54
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27
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48
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19
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40
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9
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62
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6
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3
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4
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1
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4
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1
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6
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3
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3
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5
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0
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6
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1
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7
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2
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4
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31
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44
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5
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50
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13
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58
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23
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36
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5
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0
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7
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2
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7
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2
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5
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0
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|
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4
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2
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7
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1
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6
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0
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5
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3
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|
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38
|
17
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64
|
11
|
56
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3
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46
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25
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3
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6
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1
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4
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1
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4
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3
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6
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|
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7
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1
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4
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2
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5
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3
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6
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0
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60
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15
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34
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21
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42
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29
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52
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7
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4
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1
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6
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3
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6
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3
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4
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1
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|
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4
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2
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7
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1
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6
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0
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5
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3
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|
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37
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18
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63
|
12
|
55
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4
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45
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26
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2
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7
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0
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5
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0
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5
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2
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7
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|
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7
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1
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4
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2
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5
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3
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6
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0
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|
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59
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16
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33
|
22
|
41
|
30
|
51
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8
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1
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4
|
3
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6
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3
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6
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1
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4
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|
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0
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6
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3
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5
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2
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4
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1
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7
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|
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2
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53
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28
|
47
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20
|
39
|
10
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61
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7
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2
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5
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0
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5
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0
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7
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2
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|
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3
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5
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0
|
6
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1
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7
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2
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4
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|
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32
|
43
|
6
|
49
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14
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57
|
24
|
35
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H H H* H*
Important: Note that when we swap the 6th and the 8th row in the above construction the
type of combination changes from HHHH/H*H*H*H* into HHHH/H*H*K*K*, see below :
1x digit from row grid +1 + 8x digit from column grid = most perfect 8x8 magic square
|
0
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5
|
2
|
7
|
2
|
7
|
0
|
5
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|
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0
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6
|
3
|
5
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2
|
4
|
1
|
7
|
|
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1
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54
|
27
|
48
|
19
|
40
|
9
|
62
|
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6
|
3
|
4
|
1
|
4
|
1
|
6
|
3
|
|
|
3
|
5
|
0
|
6
|
1
|
7
|
2
|
4
|
|
|
31
|
44
|
5
|
50
|
13
|
58
|
23
|
36
|
|
5
|
0
|
7
|
2
|
7
|
2
|
5
|
0
|
|
|
4
|
2
|
7
|
1
|
6
|
0
|
5
|
3
|
|
|
38
|
17
|
64
|
11
|
56
|
3
|
| |