My Jigsaw Puzzle Ext vs Unblock The Field Usage & Stats

"Unblock The Field" is a logical game. Move the blocks to shift the colored squares to their places. Solve it by the minimum number of moves. The "Solution"-button is available for all tasks(puzzles). It's a very exciting puzzle game. There are 6 groups of dimension (5x5, 6x6, 7x7, 8x8, 9x9, 10x10). Each group has 5 categories of difficulty. Each categorie has 200 levels. There are total (6x5x200) = 6000 tasks.