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' Reads Possible Ranges for Corner Squares of 6 x 6 Eccentric Squares
' Calculates n4(i, s2) Magic Corner Squares for each range (22145, 4951 sec.)

' Tested with Office 365 under Windows 10

Sub CrnrSqrs4()

Dim a1(16), a(16), b1(36), b(36), c(16)
Dim s20(72)

y = MsgBox("Locked", vbCritical, "Routine CrnrSqrs4")
End
    
    n1 = 0: n9 = 0: k1 = 1: k2 = 1
    ShtNm1 = "Ranges4a"
    s1 = 74: nVar = 16
    m1 = 1: m2 = nVar
    
    Sheets(ShtNm1).Select
    
    t1 = Timer

For j100 = 2 To 22146
Cells(1, 17).Value = j100

'   Read range from ShtNm1
    
    Erase b1
    For i1 = 1 To nVar
        a1(i1) = Sheets(ShtNm1).Cells(j100, i1).Value
        b1(a1(i1)) = a1(i1)
    Next i1
    Erase s20

For j16 = m1 To m2                                          'a(16)
If b(a1(j16)) = 0 Then b(a1(j16)) = a1(j16): c(16) = a1(j16) Else GoTo 160
a(16) = a1(j16)

For j11 = m1 To m2                                        'a(11)
If b(a1(j11)) = 0 Then b(a1(j11)) = a1(j11): c(11) = a1(j11) Else GoTo 110
a(11) = a1(j11)

For j6 = m1 To m2                                      'a(6)
If b(a1(j6)) = 0 Then b(a1(j6)) = a1(j6): c(6) = a1(j6) Else GoTo 60
a(6) = a1(j6)

a(1) = s1 - a(6) - a(11) - a(16)
If a(1) < a1(m1) Or a(1) > a1(m2) Then GoTo 10
If b1(a(1)) = 0 Then GoTo 10
If b(a(1)) = 0 Then b(a(1)) = a(1): c(1) = a(1) Else GoTo 10

For j13 = m1 To m2                                        'a(13)
If b(a1(j13)) = 0 Then b(a1(j13)) = a1(j13): c(13) = a1(j13) Else GoTo 130
a(13) = a1(j13)

For j10 = m1 To m2                                        'a(10)
If b(a1(j10)) = 0 Then b(a1(j10)) = a1(j10): c(10) = a1(j10) Else GoTo 100
a(10) = a1(j10)

a(7) = s1 - a(6) - a(10) - a(11)
If a(7) < a1(m1) Or a(7) > a1(m2) Then GoTo 70
If b1(a(7)) = 0 Then GoTo 70
If b(a(7)) = 0 Then b(a(7)) = a(7): c(7) = a(7) Else GoTo 70

a(4) = s1 - a(7) - a(10) - a(13)
If a(4) < a1(m1) Or a(4) > a1(m2) Then GoTo 40
If b1(a(4)) = 0 Then GoTo 40
If b(a(4)) = 0 Then b(a(4)) = a(4): c(4) = a(4) Else GoTo 40

For j15 = m1 To m2                                        'a(15)
If b(a1(j15)) = 0 Then b(a1(j15)) = a1(j15): c(15) = a1(j15) Else GoTo 150
a(15) = a1(j15)

a(14) = s1 - a(13) - a(15) - a(16)
If a(14) < a1(m1) Or a(14) > a1(m2) Then GoTo 140
If b1(a(14)) = 0 Then GoTo 140
If b(a(14)) = 0 Then b(a(14)) = a(14): c(14) = a(14) Else GoTo 140

a(3) = s1 - a(7) - a(11) - a(15)
If a(3) < a1(m1) Or a(3) > a1(m2) Then GoTo 30
If b1(a(3)) = 0 Then GoTo 30
If b(a(3)) = 0 Then b(a(3)) = a(3): c(3) = a(3) Else GoTo 30

a(2) = s1 - a(1) - a(3) - a(4)
If a(2) < a1(m1) Or a(2) > a1(m2) Then GoTo 20
If b1(a(2)) = 0 Then GoTo 20
If b(a(2)) = 0 Then b(a(2)) = a(2): c(2) = a(2) Else GoTo 20

For j12 = m1 To m2                                        'a(12)
If b(a1(j12)) = 0 Then b(a1(j12)) = a1(j12): c(12) = a1(j12) Else GoTo 120
a(12) = a1(j12)

a(9) = s1 - a(10) - a(11) - a(12)
If a(9) < a1(m1) Or a(9) > a1(m2) Then GoTo 90
If b1(a(9)) = 0 Then GoTo 90
If b(a(9)) = 0 Then b(a(9)) = a(9): c(9) = a(9) Else GoTo 90

a(8) = s1 - a(4) - a(12) - a(16)
If a(8) < a1(m1) Or a(8) > a1(m2) Then GoTo 80
If b1(a(8)) = 0 Then GoTo 80
If b(a(8)) = 0 Then b(a(8)) = a(8): c(8) = a(8) Else GoTo 80

a(5) = s1 - a(1) - a(9) - a(13)
If a(5) < a1(m1) Or a(5) > a1(m2) Then GoTo 50
If b1(a(5)) = 0 Then GoTo 50
If b(a(5)) = 0 Then b(a(5)) = a(5): c(5) = a(5) Else GoTo 50

                            s2 = a(2) + a(5): s20(s2) = s20(s2) + 1

'                           n9 = n9 + 1: Cells(1, 1).Value = n9 'Counting
'                           n9 = n9 + 1: GoSub 640              'Print results (selected numbers)
'                           n9 = n9 + 1: GoSub 650              'Print results (squares)
'                           Erase b, c: GoTo 1000               'Print only first square
5

    b(c(5)) = 0: c(5) = 0
50  b(c(8)) = 0: c(8) = 0
80  b(c(9)) = 0: c(9) = 0
90  b(c(12)) = 0: c(12) = 0
120 Next j12

    b(c(2)) = 0: c(2) = 0
20  b(c(3)) = 0: c(3) = 0
30  b(c(14)) = 0: c(14) = 0
140 b(c(15)) = 0: c(15) = 0
150 Next j15

    b(c(4)) = 0: c(4) = 0
40  b(c(7)) = 0: c(7) = 0
70  b(c(10)) = 0: c(10) = 0
100 Next j10
    b(c(13)) = 0: c(13) = 0
130 Next j13

    b(c(1)) = 0: c(1) = 0
10  b(c(6)) = 0: c(6) = 0
60  Next j6
    b(c(11)) = 0: c(11) = 0
110 Next j11
    b(c(16)) = 0: c(16) = 0
160 Next j16
    
'   Add n4(j100, s2)
    
    For i1 = 1 To 72
        Cells(j100, 16 + i1).Value = s20(i1)
    Next i1
    
1000  Next j100

   t2 = Timer
    
   t10 = Str(t2 - t1) + " sec., " + Str(n9) + " Solutions"
   y = MsgBox(t10, 0, "Routine CrnrSqrs4")

End

'   Print results (selected numbers)

640 Cells(n9, 9).Select
    For i1 = 1 To 16
        Cells(n9, i1).Value = a(i1)
    Next i1
    Return

'   Print results (squares)

650 n1 = n1 + 1
    If n1 = 5 Then
        n1 = 1: k1 = k1 + 5: k2 = 1
    Else
        If n9 > 1 Then k2 = k2 + 5
    End If
    
    Cells(k1, k2 + 1).Select
    Cells(k1, k2 + 1).Font.Color = -4165632
    Cells(k1, k2 + 1).Value = s1
    
    i3 = 0
    For i1 = 1 To 4
        For i2 = 1 To 4
            i3 = i3 + 1
            Cells(k1 + i1, k2 + i2).Value = a(i3)
        Next i2
    Next i1
    Return
     
End Sub

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