Place blocks in a 9x9 field. Full rows and columns will be removed.
One difficulty level. Gets harder as the field is more filled up. Problem is you never know what will come in the next group of 3 blocks, which makes it very risky to try to build up to remove many rows or columns at the same time. One wrong set of 3 and you are done.
The daily puzzles have some variation, for example blocks that only remove once they have been in a full row or column a certain number of times.
Simple, but functional.
I give Classic Original Block Puzzle 6 out of 10 stars. Simple block fitting puzzle.