2 cells …. dominos
4 cells …. tetrominos
5 cells …. pentominos
7 cells …. heptominos
This game uses the 12 rotation type pentomino shapes as the basis of the puzzle. The set of rotation type polyominos is always less than the set of translation type polyominos. For example,there are 18 translation type pentominos and 12 rotation type pentominos. These12 shapes are shown on the row of buttons in the pentomino game.
Martin Gardner wrote an article in 1958 on the subject of polyominos. In this article he pointed out that the twelve rotation type pentominos (simply called pentominos from now on) can be used to form variables rectangles with a total area of 60 units. The shapes of the rectangles are (3×20), (4×15), (5×12) and (6×10) units.
The number of solutions for each of these rectangle shapes are 2, 368, 1010 and 2339 respectively. The (3×20) shaped rectangle is the hardest to solve, while the (6×10) shaped rectangle is the easiest.
A 3D variation of the puzzle uses only N-pentacubes to form the rectangle shapes of (2x4x5), (2x5x5), (2x6x5) and (2x7x5). There are endless further possibilities, but the implementation of these extensions are left to you.
The objective of this game is to solve as many of the puzzles as you can in each of the four rectangle formats. As you solve each puzzle, it is saved in a file called pent.ini in the main Windows directory.These puzzles can be restored and used as the basis of other puzzles.”
Another thing that really makes Pentonimo v1.020 enjoyable for me is how it manages to stay interesting even after playing it multiple times. Many games feel repetitive after a while, but here, the experience still feels fresh because of the small details and different ways you can approach the gameplay. As you continue playing, you naturally start improving and understanding the mechanics better, which makes everything feel more rewarding. I also appreciate the balance the game maintains—it’s not too difficult, but it’s not too easy either. You can play it casually for a short break or spend longer sessions without getting bored. That flexibility is one of the biggest reasons why I keep coming back to Pentonimo v1.020. Overall, it’s the kind of game that doesn’t just entertain you for a moment, but actually gives you a consistently enjoyable experience every time you play.
