17x17

17x17 refers to a square grid of 17 rows and 17 columns. This specific grid size is most commonly encountered in the context of puzzle games, particularly Sudoku variants. Standard Sudoku puzzles are played on a 9x9 grid, which is composed of nine 3x3 subgrids. A 17x17 grid, however, does not naturally divide into perfect square subgrids. Instead, 17x17 Sudoku puzzles typically utilize rectangular subgrids, often 17x1 subgrids, or more commonly, a system of non-overlapping regions of 17 cells each, which can take on irregular shapes.

The complexity of a 17x17 Sudoku is significantly higher than that of a standard 9x9 Sudoku due to the increased number of cells and the greater variety of potential digit placements. Solving such puzzles requires advanced logical deduction and pattern recognition. The number of possible solutions for a 17x17 Sudoku is also vastly larger than for its smaller counterpart. The term 17x17 can also occasionally be used in other contexts involving matrices or grids, but its most prominent association is with these larger, more challenging Sudoku puzzles.