Related to Problem 1646, but bigger. Technically, all you need to do for this Cody problem is input a 4x4 matrix containing the numbers 1-16. However, your score will be the Kurchan value of the matrix, which is defined as the difference between the maximum and minimum of the products for the rows, columns, diagonals, and anti-diagonals of the matrix.

For example: Magic(4) is

    16     2     3    13
     5    11    10     8
     9     7     6    12
     4    14    15     1

The row products are:

  • 16*2*3*13=1248
  • 5*11*10*8=4400
  • 9*7*6*12=4536
  • 4*14*15*1=840

The column products are:

  • 16*9*5*4=2880
  • 2*11*7*14=2156
  • 3*10*6*15=2700
  • 13*8*12*1=1248

The diagonal products are:

  • 16*11*6*1=1056
  • 2*10*12*4=960
  • 3*8*9*14=3024
  • 13*5*7*15=6825

The anti-diagonal products are:

  • 13*10*7*4=3640
  • 3*11*9*1=297
  • 2*5*12*15=1800
  • 16*8*6*14=10752

The highest value is 10752, while the lowest is 297. Therefore, the score of this matrix is 10455. Your Cody score will be the Kurchan score of your matrix.

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Last Solution submitted on Nov 23, 2025

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Pauli Huusari CXD Mehdi Dehghan 晨哲

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