Originally I created this puzzle for the Hungarian Puzzle Championship. But finally I didn't use it. I had no intention of making a hard puzzle which nobody would solve. So I added some basic steps during the creation. Now I changed a little this puzzle, I eliminated some clues and added some new.
I don't think it is possible to solve without trial & error, but I used this tecnique two times during the testing and botf of them were pretty trivial. Nevertheless this is a hard puzzle, not for me who know really well this grid-form but for many puzzlers. I think this, because one of the test solvers couldn't solve the original version.
Rules: The grid was built up of the given set of dominoes. Unfortunately the numbers have been erased. Numbers around the figure reveal what numbers are there on the domino halves in the given row or column. Find out the original arrangement.