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' Generates 6 x 6 Semi Magic Squares, Counts related Simple Magic Squares
' Consecutive Prime Numbers

' Tested with Office 2007 under Windows 7

Sub CnstrSqrs6()

Dim a(36), a0(6, 6), a1(6), a2(6)
Dim n(6, 2)
Dim a3(6, 6), a4(6, 6), a5(16), d1(6), d2(6)

y = MsgBox("Blocked", vbInformation, "CnstrSqrs6")
End

Sheets("Klad1").Select

n1 = 0: n9 = 0: k1 = 1: k2 = 1

ShtNm1 = "GenLns6"
ShtNm2 = "ScrSht6"

t1 = Timer

For j100 = 2 To 2 ''586
Cells(k1, 1).Select: Cells(k1, 1).Value = j100

i2 = 1: i3 = 0
For i1 = 1 To 36:
    i3 = i3 + 1: If i3 = 7 Then i3 = 1: i2 = i2 + 1
    a0(i2, i3) = Sheets(ShtNm1).Cells(j100, i1)
Next i1
s1 = Sheets(ShtNm1).Cells(j100, 51)

    Sheets(ShtNm2).Select
    Cells.Select: Selection.ClearContents
    Range("A1").Select
    
    GoSub 500               ' Prepare Scratch Sheet
    
    Sheets("Klad1").Select
        
    For j1 = n(1, 1) To n(1, 2)
    Cells(k1 + 1, 1).Select: Cells(k1 + 1, 1).Value = j1
    
    n10 = 6: Erase a
    For i1 = 1 To 6
        a1(i1) = Sheets(ShtNm2).Cells(j1, i1).Value
    Next i1
    For i1 = 1 To 6   'First Line
        a(i1) = a1(i1)
    Next i1
    
    For j2 = n(2, 1) To n(2, 2)
    Cells(k1 + 2, 1).Select: Cells(k1 + 2, 1).Value = j2
    j300 = j2: GoSub 100: If fl1 = 0 Then GoTo 20
    
    For j3 = n(3, 1) To n(3, 2)
    j300 = j3: GoSub 100: If fl1 = 0 Then GoTo 30
    
    For j4 = n(4, 1) To n(4, 2)
    j300 = j4: GoSub 100: If fl1 = 0 Then GoTo 40
    
    For j5 = n(5, 1) To n(5, 2)
    j300 = j5: GoSub 100: If fl1 = 0 Then GoTo 50
    
    For j6 = n(6, 1) To n(6, 2)
    j300 = j6: GoSub 100: If fl1 = 0 Then GoTo 60
    
       Nc9 = Nc9 + 1                        'Unchecked
    
'      Check Possible Diagonals
    
       GoSub 200: If fl1 = 0 Then GoTo 5    'Write Sets 'ScrSht6'
       GoSub 400: If n29 = 0 Then GoTo 5    'Check Valid Sets
       
       n9 = n9 + 1: GoSub 650               'Print results (squares)

5
       
       n10 = n10 - 6
60     Next j6
       n10 = n10 - 6
50     Next j5
       n10 = n10 - 6
40     Next j4
       n10 = n10 - 6
30     Next j3
       n10 = n10 - 6
20     Next j2
       n10 = n10 - 6
10     Next j1
    
1000 Next j100

t2 = Timer
    
    t10 = Str(t2 - t1) + " sec., " + Str(n9) + " Solutions for sum" + Str(s1)
    y = MsgBox(t10, 0, "Routine CnstrSqrs6")
End
    
'   Construct Semi Magic Squares

100 fl1 = 1

    For i1 = 1 To 6
        a2(i1) = Sheets(ShtNm2).Cells(j300, i1).Value
    Next i1

    For i1 = 1 To 6
    a20 = a2(i1)
    For i2 = 1 To n10
        If a20 = a(i2) Then fl1 = 0: Return
    Next i2
    Next i1
    
    n10 = n10 + 6
    i2 = 0
    For i1 = n10 - 6 + 1 To n10
        i2 = i2 + 1
        a(i1) = a2(i2)
    Next i1

    Return
    
'   Check Possibility Diagonals

200 fl1 = 1

    i2 = 1: i3 = 0
    For i1 = 1 To 36:
         i3 = i3 + 1: If i3 = 7 Then i3 = 1: i2 = i2 + 1
         a3(i2, i3) = a(i1)
    Next i1

    i19 = 0
    For i11 = 1 To 6
    For i12 = 1 To 6
    If i12 = i11 Then GoTo 220
    For i13 = 1 To 6
    If i13 = i11 Or i13 = i12 Then GoTo 230
    For i14 = 1 To 6
    If i14 = i11 Or i14 = i12 Or i14 = i13 Then GoTo 240
    For i15 = 1 To 6
    If i15 = i11 Or i15 = i12 Or i15 = i13 Or i15 = i14 Then GoTo 250
    For i16 = 1 To 6
    If i16 = i11 Or i16 = i12 Or i16 = i13 Or i16 = i14 Or i16 = i15 Then GoTo 260
    
    s11 = a3(1, i11) + a3(2, i12) + a3(3, i13) + a3(4, i14) + a3(5, i15) + a3(6, i16)
    If s11 <> s1 Then GoTo 260
    
    i19 = i19 + 1
    
    Sheets(ShtNm2).Cells(i19, 11).Value = a3(1, i11)
    Sheets(ShtNm2).Cells(i19, 12).Value = a3(2, i12)
    Sheets(ShtNm2).Cells(i19, 13).Value = a3(3, i13)
    Sheets(ShtNm2).Cells(i19, 14).Value = a3(4, i14)
    Sheets(ShtNm2).Cells(i19, 15).Value = a3(5, i15)
    Sheets(ShtNm2).Cells(i19, 16).Value = a3(6, i16)

260 Next i16
250 Next i15
240 Next i14
230 Next i13
220 Next i12
210 Next i11

    If i19 < 2 Then fl1 = 0: Return

    n19 = 0
    For j11 = 1 To i19
 
    n20 = 6: Erase a5
    For i1 = 1 To 6
        a1(i1) = Sheets(ShtNm2).Cells(j11, i1 + 10).Value
    Next i1
    For i1 = 1 To 6   'First Line
        a5(i1) = a1(i1)
    Next i1
    
    For j12 = j11 + 1 To i19
    j300 = j12: GoSub 300: If fl2 = 0 Then GoTo 120

'      Write Set Diagonals to 'ScrSht6'

       For i1 = 1 To 2
            
            n19 = n19 + 1
            For i2 = 1 To 6
                 Sheets(ShtNm2).Cells(n19, i2 + 20).Value = a5(i2 + (i1 - 1) * 6)
            Next i2
            Sheets(ShtNm2).Cells(n19, 9 + 20).Value = i1
            
       Next i1

       n20 = n20 - 6
120    Next j12
       n20 = n20 - 6
110    Next j11

       If n19 < 2 Then fl1 = 0

Return
    
'   Construct Magic Set Diagonals

300 fl2 = 1

    For i1 = 1 To 6
        a2(i1) = Sheets(ShtNm2).Cells(j300, i1 + 10).Value
    Next i1

    For i1 = 1 To 6
    a20 = a2(i1)
    For i2 = 1 To n20
        If a20 = a5(i2) Then fl2 = 0: Return
    Next i2
    Next i1
    
    n20 = n20 + 6
    i2 = 0
    For i1 = n20 - 6 + 1 To n20
        i2 = i2 + 1
        a5(i1) = a2(i2)
    Next i1

    Return
        
'   Read Diagonals for Final Check

400
    n29 = 0
    For j20 = 1 To n19 - 1 Step 2
        
        For i1 = 1 To 6
            d1(i1) = Sheets(ShtNm2).Cells(j20, i1 + 20).Value
            d2(i1) = Sheets(ShtNm2).Cells(j20 + 1, i1 + 20).Value
        Next i1
     
        Erase a4
        For i1 = 1 To 6
        For i2 = 1 To 6
            If a3(i1, i2) = d1(i1) Then a4(i1, i2) = 1
            If a3(i1, i2) = d2(i1) Then a4(i1, i2) = 2
        Next i2
        Next i1

        GoSub 450      'Check if transformation is possible
        
        If fl1 = 1 Then n29 = n29 + 1
        
    Next j20

    Return

'   Check if transformation is possible

450 fl1 = 1

    For i1 = 1 To 6                 'rows
        n21 = 0
        For i2 = 1 To 6             'clmns
            If a4(i1, i2) <> 0 Then
               n21 = n21 + 1
               If n21 = 1 Then i41 = i2 Else i42 = i2
            End If
        Next i2
        
        For i3 = i1 + 1 To 6
            If a4(i3, i41) = 0 And a4(i3, i42) = 0 Then
                                     'continue
            Else
               If a4(i3, i41) = a4(i1, i42) And a4(i3, i42) = a4(i1, i41) Then
                  Exit For          'ok
               Else
                  fl1 = 0: Return   'no match
               End If
            End If
        Next i3
        
    Next i1

    Return
       
        
'   Prepare Scratch Sheet

500

i9 = 0: n(1, 1) = 1

For i1 = 1 To 6
For i2 = 1 To 6
For i3 = 1 To 6
For i4 = 1 To 6
For i5 = 1 To 6
For i6 = 1 To 6

    s11 = a0(1, i1) + a0(2, i2) + a0(3, i3) + a0(4, i4) + a0(5, i5) + a0(6, i6)
    If s11 <> s1 Then GoTo 560
    
    i9 = i9 + 1
    Cells(i9, 1).Value = a0(1, i1)
    Cells(i9, 2).Value = a0(2, i2)
    Cells(i9, 3).Value = a0(3, i3)
    Cells(i9, 4).Value = a0(4, i4)
    Cells(i9, 5).Value = a0(5, i5)
    Cells(i9, 6).Value = a0(6, i6)

560 Next i6
550 Next i5
540 Next i4
530 Next i3
520 Next i2
    
    n(i1, 2) = i9: If i1 <> 6 Then n(i1 + 1, 1) = i9 + 1

510 Next i1

    n(6, 2) = i9
   
    Return
    
'   Print results (squares)

650 n2 = n2 + 1
    If n2 = 5 Then
        n2 = 1: k1 = k1 + 7: k2 = 1
    Else
        If n9 > 1 Then k2 = k2 + 7
    End If

    Cells(k1, k2 + 1).Select
    Cells(k1, k2 + 1).Font.Color = -4165632
    Cells(k1, k2 + 1).Value = Nc9 ''n9
    Cells(k1, k2 + 2).Value = n29
    Cells(k1, k2 + 6).Value = j100
    
    i3 = 0
    For i1 = 1 To 6
        For i2 = 1 To 6
            i3 = i3 + 1
            Cells(k1 + i1, k2 + i2).Value = a(i3)
        Next i2
    Next i1

    Return
    
End Sub

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