Sudoku

LogicNumbersFocus

Fill the structured grid so every row, column, and region contains each digit exactly once. Designed for crisp, rapid mobile sessions that sharpen deductive reasoning.

How to Play in 3 Simple Steps

Master the rules in seconds—designed for intuitive touch and mouse control.

01

Scan Rows, Columns & 2×3 Blocks

Every horizontal row, vertical column, and bold-bordered region must contain each number from 1 to 6 without repetition.

02

Select a Cell & Input a Number

Tap any empty cell on the board, then tap a digit on the bottom number pad to place your deduction.

03

Complete the Grid for the Green Wave

Use process of elimination rather than guessing. When the final digit locks into place, celebrate with the signature qTime green wave.

Cognitive & Brain Training Benefits

How regular sessions of this puzzle strengthen specific neural pathways and executive functions.

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Prefrontal Cortex Activation

Holding candidate numbers in mind while scanning intersecting rows exercises executive working memory.

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Systematic Elimination

Trains the brain to filter noise, recognize constraints, and make high-certainty decisions under calm focus.

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Flow State Induction

Balanced 6×6 boards eliminate tedious bookkeeping so you enter a restorative cognitive flow within seconds.

Pro Strategies & Deduction Tips

Techniques used by experienced solvers to clear boards faster and maintain long streaks.

01.Start with the most populated row, column, or 2×3 box—where 4 or 5 digits are already placed, the missing values reveal themselves immediately.
02.Look for "Naked Singles": cells where 5 other numbers already appear in the intersecting row, column, and box.
03.Cross-hatch by digit: pick a number that appears frequently on the board and trace its lines to isolate the last remaining valid spot.

Game-Specific Questions & Answers — Sudoku

A 6×6 Sudoku with 2×3 blocks preserves 100% of the pure deductive logic of 9×9 Sudoku while fitting ergonomics of a mobile screen with large, comfortable touch targets and a 2-to-4 minute completion time.
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