What Are the Numbers in the First Column of This Sudoku-Like Puzzle?

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The discussion revolves around solving a number puzzle where participants are tasked with filling in numbers 1 to 9 in a grid without repeating any numbers in rows or columns. A user has shared a file and a link to a visual representation of the puzzle, along with a specific sequence for the first column. Another user mentions using a computer program to solve the puzzle, highlighting that the program efficiently found a solution, running significantly faster than expected due to correct initial guesses. The program's performance could have been improved further by changing the approach to filling in the grid. Additionally, an Excel spreadsheet was utilized to generate the puzzle, indicating a methodical approach to creating and solving these types of challenges.
AntonVrba
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Open attached file and

Fill in numbers 1 to 9 such that no number repeats in any column or row.

What are the numbers in the first column - in sequence top down?

here is also a link numblock1.gif
 

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:smile: I have added a trainer :smile:

Fill in numbers 1 to 5 such that no number repeats in any column or row.

complete the number in the first row 3***1

here is the file trainer.gif
 

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I wrote a computer program to solve this:


6 1 2 5 4 3 7 # 8 9
1 2 3 4 # 5 9 6 7 8
2 4 5 9 1 7 3 8 # 6
3 5 6 2 7 8 # 1 9 4
4 7 # 8 9 1 6 3 2 5
7 8 9 # 2 6 4 5 1 3
5 # 7 3 8 9 1 4 6 2
9 6 8 7 3 # 5 2 4 1
8 9 1 6 5 4 2 7 3 #
# 3 4 1 6 2 8 9 5 7


The program quits when it finds a solution so I don't know if there are others. By coincidence, the program ran about 20 times faster than would be expected just because by fantastic luck, the first two guesses it made were correct. If I had moved vertically down the matrix instead of horizontally across, it would have run even faster as the first four guesses would have been correct.
 
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that was quick. !

I used an exel spread sheet to generate puzzle
 
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