“Pips Shidoku 4×4″ Puzzle Rules:
Fill the grid with the digits 1–4 so that each digit appears exactly once in every row, column, and 2×2 box.
Some cells contain pips (dots) indicating the number of orthogonally adjacent cells that contain the same digit as that cell.
Link to solve it online: Penpa+
Solution of this Pips Shidoku 4×4 puzzle can be viewed by clicking on button. Please do give your best try to solve this Sudoku puzzle before looking at the answer.
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