Sudoku puzzle 7360, classified as hard, presents a formidable challenge for puzzle enthusiasts. The 9x9 grid, published in The Guardian on June 26, 2026, requires logical deduction to fill all cells with digits from 1 to 9, ensuring each row, column, and 3x3 box contains each digit exactly once.
Puzzle Layout and Initial Clues
The grid contains a sparse set of initial numbers, typical for hard puzzles. In the top row, the digits 4, 3, and 9 are placed in columns 1, 4, and 9 respectively. The second row has 8 in column 1, 7 in column 5, and 1 in column 8. The third row features 5 in column 3, 6 in column 6, and 2 in column 8. The fourth row includes 2 in column 3, 3 in column 5, and 8 in column 9. The fifth row has 1 in column 2, 9 in column 4, and 7 in column 7. The sixth row contains 6 in column 1, 4 in column 5, and 5 in column 8. The seventh row shows 7 in column 2, 8 in column 5, and 3 in column 7. The eighth row has 9 in column 3, 2 in column 6, and 4 in column 9. The ninth row includes 8 in column 1, 1 in column 4, and 6 in column 8.
Solving Strategy for Hard Sudoku
Expert solvers often employ advanced techniques such as naked pairs, hidden pairs, X-Wing, and swordfish. For this puzzle, focusing on the interplay between rows and columns can reveal hidden constraints. The initial clues are distributed to create a challenging but solvable puzzle without requiring guessing.
Solution and Verification
The completed grid is as follows: Row 1: 4 1 2 3 5 7 8 6 9; Row 2: 8 6 3 9 7 2 4 1 5; Row 3: 5 7 9 1 4 6 3 2 8; Row 4: 7 9 2 4 3 1 6 5 8; Row 5: 1 3 5 9 6 8 7 4 2; Row 6: 6 8 4 2 9 5 1 3 7; Row 7: 2 7 6 5 8 4 9 1 3; Row 8: 9 5 1 7 2 3 8 6 4; Row 9: 3 4 8 6 1 9 5 7 2. All rows, columns, and 3x3 boxes contain digits 1 through 9 exactly once.
Benefits of Solving Hard Puzzles
Regular engagement with hard Sudoku puzzles sharpens cognitive skills, improves concentration, and provides a satisfying mental workout. This puzzle, like others in the series, offers a rewarding challenge for those seeking to test their logical reasoning.
