4×4 Grid Logic

Mini Sudoku – 4x4 Grid Logic Puzzles

Fill the 4×4 grid so that every row, every column, and each 2×2 box contains the digits 1 through 4 exactly once without duplicates. Perfect for fast deductive training.

Level 1: Quick Start (12 given)

Tap or use keyboard (1–4) to fill selected cell:

Difficulty: easy

Mini Sudoku Rules

Row Constraint: Each of the 4 horizontal rows must contain numbers 1, 2, 3, and 4 without duplicates.
Column Constraint: Each of the 4 vertical columns must contain numbers 1, 2, 3, and 4 without duplicates.
2×2 Box Constraint: Each of the four 2×2 quadrants (top-left, top-right, bottom-left, bottom-right) must contain numbers 1, 2, 3, and 4.
Deduction over Guessing: Every puzzle has one unique valid solution achievable purely through elimination.

Solving Techniques

Naked Singles: cell with only one candidate
Hidden Singles: digit that can only fit in one spot
Cross-Hatching rows and columns
Spatial memory and concentration

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