Problem 1646. Kurchan 3x3 - Optimal Score
Find an optimal 3x3 Kurchan square, score of 198.
A 3x3 Kurchan square has values 1:9.The products of each row, column, diagonal, and anti-diagonal are used
The Kurchan-value is the Max minus the Minimum of these products.
Example: m=[5 1 8;3 9 4;7 2 6]
Row Products: 40,108, and 84. Column products 105, 18, and 192.
Diagonal Products: 270, 1*4*7=28, and 8*3*2=48.
Anti-Diagonal Products: 8*9*7=504, 1*3*6=18, and 5*4*2=40.
K is thus 504-18 = 486. [ Max of all products - Min of all products ]
Input: None
Output: Kurchan Square [3x3] that scores 198
I expect someone to give a min size hardcoded solution at some point.
Related Challenges:
2) Minimize Kurchan Squares (N=4:9)
3) Minimize Kurchan Squares (N=10:20) [Very large numbers]
4) Maximize Sum of Products (N=4:9) and a Large number Challenge
5) Minimize Sum of Products (N=4:9) and a Large number Challenge
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