For this puzzle, let's define 'Take Five' as a set of 5 different cells in a 5x5 number grid such that none of the selected cells are on the same row or column.
I had a magic 5x5 number grid. It was magical in a way that all 120 'Take Five' configurations share a special common property. You'll have to figure out that special property as the first task. This property is related to a 4-digit number, which happens to be the same year Antony Donaldson created an oil-on-canvas painting called you-know-what.
What made the grid even more special was the fact that I embedded a location of a cache using one of the possible 'Take Five' combinations.
But there is a problem. I showed my wife my 'Take Five' cells with the coordinates and I bragged about how good puzzle cachers are at figuring out hidden coordinates. The next day, I noticed that my 'Take Five' cells which contained those coordinates had been compromised! Worse, I cannot remember which combination I used last time. Apparently, my wife had changed all five numbers of my 'Take Five' cells, so their values no longer correspond to the correct cache location.
"Solve THAT!", she challenged, adding a hint: "I changed the value of each cell to a number of a lesser value. Here's how your stupid grid looks like now, mbwhahahwhahwaaaa!!!!".
I now rely on you, good cachers, to perform the second task, which is to recover my special magic grid. Please help!
You can validate your puzzle solution with certitude.
FTF Prize: You guessed it, Take Five (bucks, that is). Don't worry about it. I took it from my wife's purse, mbwahahaha.
Congrats billrow on the well deserve FTF, and Budzdunwerkin for STF.