Point To Next Sudoku - Rules & Guide

Tip 1: Arrow cells cannot contain 9

If an arrow cell contained 9, it would require a 10 in the arrow's direction. Since Sudoku uses only digits 1 to 9, every arrow cell can immediately eliminate 9.

Tip 2: Use short arrows first

If an arrow points toward only one remaining cell before the edge of the grid, the rule becomes direct: that one target cell must contain n+1. These short arrows often provide fast progress.

Tip 3: Combine arrows with normal elimination

When an arrow has several possible target cells, use row, column, and box restrictions to decide where n+1 can go. For example, if the arrow cell is 4, then a 5 must appear somewhere on the arrow's line of sight.

Example: follow each arrow to find where n+1 can be placed.

A: No. The digit n+1 can be anywhere along the arrow's line of sight. It must be adjacent only when the arrow points to exactly one available cell before the edge of the grid.

A: Not necessarily. The rule works from the arrow cell outward. A 4 in the arrow cell requires a 5 in the arrow's direction, but a visible 5 along that line does not prove that the arrow cell is 4.