I am making a simple puzzle. I remeber in my youth that I encountered a 9x9 tray where a piece is missing and you have to move around so that the puzzle fits with each other. I’ve made my own variant and it should add all bits randomly. But I have encountered a combo that I cannot solve, either I lack the puzzel knowledge or it’s a variant that cannot be solved.

Please try. It should be 1-9 where the first row is 1,2,3, then 4, 5, 6 (with 5 is gone so it should be empty)

You get a message if you passed it.

Can’t solve it myself.