Normal sudoku rules apply. Place the digits 1-4 once each in every row, column, and 2x2 box.
Kropki: digits separated by a white dot are consecutive.
No Short Index Loops: a cell in row r, column c containing digit d points to row c, column d. A cell may not point to itself, and two cells may not point to each other.
Solve in VariantDoku (iOS) or on SudokuPad.
Solution code: Enter the digits of row 4.
yesterday, 20:20 by pmays123
Very cool puzzle! Once I wrapped my head around the rules it was fun to make deductions
on 25. May 2026, 12:22 by Brandy New
Revised difficulty