Logic Masters Deutschland e.V.

Standard doubler modifier and arrow rules. I was surprised at how much logic could be built in a 4x4 with arrows and doubler modifiers and wanted to put some of the same tricks in to a 6x6, so these can be thought of as a training ground for puzzles with doubler modifiers. If you'd like to try a 9x9, one of the first puzzles I set was such a thing. Good luck!

• Normal NxN sudoku rules apply: Place the digits 1 to 4/1 to 6 once each in every row, column, and box
• Doublers: Each row, column, and box contains one doubler cell, each containing a different digit. The value of a doubler cell is double the digit in that cell
• Arrows: Values on an arrow sum to value in the attached circle

Play 4x4 in Sudokupad

Play 6x6 in Sudokupad