Logic Masters Deutschland e.V.

Grouping All but Four

Rules:

• Normal Sudoku rules apply.


• Divide all cells in the grid except for the four grey cells (r9c3, r9c7, r9c8, and r9c9) into groups of orthogonally connected cells. Every group contains exactly one cell with a circle. The digit in a circle cell, N, indicates the number of cells in that group. Digits may not repeat within a group. r9c3, r9c7, r9c8, and r9c9 are not in any of the groups but are still affected by normal Sudoku rules.


• If different groups have the same digit in their respective circles, those groups must contain the same set of digits. As an example, a circle cell containing a 4 would be in a group of 4 orthogonally connected cells with unique digits, such as potentially 2, 4, 5, and 9. If a second circle cell also contained a 4, then its group would also contain the digits 2, 4, 5, and 9 in this scenario.


• Digits separated by a white dot are consecutive. Digits separated by a black dot are in a 1:2 ratio (i.e. one is double the other). Cells separated by either type of dot are in different groups.

SudokuPad link

Enjoy!

This is the fifth of my "Grouping" puzzles. You can find the others here:

• Grouping All but One
• Grouping Everyone
• Grouping All but Two
• Grouping All but Three