What is ▻Sudoku
Sudoku is a popular logic puzzle game.
The goal is to fill a 9x9 grid with numbers from 1 to 9 so that each row, column and 3x3 section has no repeats.
This Sudoku game comes with a point system, runs, and online leaderboards. It has 17 difficulty levels and a tutorial for beginners.
▻Sudoku Gameplay
The gameplay of Sudoku is simple but challenging. You have to fill a 9x9 grid with numbers from 1 to 9 so that each row, column and 3x3 section has no repeats. You can use logic and deduction to find the missing numbers.
It has a point system that rewards you for solving puzzles quickly and accurately, and a run system that tracks how many puzzles you can solve in a row without mistakes.
It also has online leaderboards where you can compare your scores and ranks with other players around the world. The app has amazing graphics, animations, and ease of use that make it a pleasure to play.
▻Sudoku Tips & Tricks
Scan rows and columns within each triple-box area, eliminating numbers or squares and finding situations where only one number can fit in a square.
Use pencil marks to write down all the possible numbers for each square, and erase them as you eliminate them.
Look for naked pairs, triples, or quads, which are sets of two, three, or four possible numbers that appear in exactly two, three, or four squares of a row, column, or box. You can eliminate those numbers from other squares in the same row, column, or box.
Look for hidden pairs, triples, or quads, which are sets of two, three, or four possible numbers that appear only in two, three, or four squares of a row, column, or box, but are not the only numbers in those squares. You can eliminate other numbers from those squares.
Look for X-wings, swordfishes, or jellyfishes, which are sets of two, three, or four rows (or columns) that have only two possible squares for a certain number. You can eliminate that number from other squares in the same columns (or rows).
Look for intersections between boxes and rows or columns. If a number appears only in one row or column of a box, you can eliminate that number from other squares in the same row or column outside the box.
Look for unique rectangles, which are four squares that form the corners of a rectangle within a box and have only two possible numbers. If two of those squares share a unit and have the same two numbers, you can eliminate those numbers from the other two squares.
Look for coloring techniques, which involve marking squares with the same possible number with different colors and following the logic of how they affect each other. You can eliminate numbers that create contradictions or loops.
Look for forcing chains or nets, which involve assuming a number in a square and following the consequences until you find a contradiction or a solution. You can eliminate numbers that lead to contradictions or confirm numbers that lead to solutions.
Use trial and error as a last resort. Pick a square with few possibilities and try one of them. If it leads to a contradiction, you can eliminate that number. If it leads to a solution, you have solved the puzzle.