In the puzzle game "Rule", players are presented with a grid of squares that must be filled in according to a set of rules. These rules are based on the concept of discrete tomography, which measures the number of unbroken lines of filled squares in each row or column. For example, a clue of "4 8 3" would mean that there are sets of four, eight, and three filled squares in that order, with at least one blank square between each set.
The game features hand-crafted pixel art and offers a variety of topics for players to enjoy. When faced with a difficult puzzle, players can use a hint to help them progress. The game also offers easy controls, allowing players to either drag and drop or use a d-pad to fill in squares. The relaxing music and automatic saving and resuming of playing sessions add to the overall mindfulness of the game. Players can also use the "Mark (X)" feature to make solving puzzles easier.
When approaching simpler puzzles, players can usually solve them by focusing on one row or column at a time. By determining as many boxes and spaces as possible in that row or column, players can then move on to the next row or column until all cells are filled. However, more difficult puzzles may require players to use "what if?" reasoning, which involves considering multiple rows or columns at once. This strategy involves searching for contradictions, where a cell cannot be a box because it would create an error, and therefore must be a space. Advanced players may even use deeper levels of "what if?" reasoning, although this can be time-consuming.
In summary, "Rule" is a puzzle game that challenges players to use logic and reasoning to fill in squares according to a set of rules. With its beautiful pixel art, various topics, and helpful features such as hints and automatic saving, the game offers a relaxing and mindful experience. Players can approach puzzles by focusing on one row or column at a time, or by using more advanced "what if?" reasoning to solve more difficult puzzles.