A free program for Android, by TangramGames.

We are pleased to introduce Block Puzzle – a brand new and unique game! This app combines the best elements of Sudoku, Tetrix, and Jigsaw puzzles. All you have to do is select one of the three provided blocks and place it on the board. It’s a relaxing and enjoyable game that is great for all ages. It’s easy to play and all you need to do is follow the rules of the game. You will continuously gain in-game scores as you clear the blocks and play higher levels. Just keep on playing and challenging the highest score.