A little space for your mind.
One grid, a little challenge, and the satisfaction of figuring it out your way.
Your next move starts here.
Small lessons. Clear examples. More “I’ve got it” moments.
How to play sudoku: Rules and first steps
Learn classic sudoku rules, recognise rows, columns and boxes, and solve your first cells with worked examples.
Read & practiseNaked single: One cell, one candidate
Find cells with just one candidate and learn to check why the other eight digits are excluded, without guessing.
Read & practiseHidden single: One digit, one possible place
Learn to find the only place for a digit in a row, column or box, even when the cell has several pencil marks.
Read & practiseEvery player has something to share.
A space for your questions, discoveries and little victories.
A little more curiosity.
A sudoku routine that does not depend on the clock
A simple way to practise deliberately, review a deduction and enjoy a puzzle without always chasing your fastest time.
Read & practiseSudoku pencil marks: When they help and when they confuse
Organise sudoku notes, distinguish complete candidate lists from reminders and avoid deductions based on missing pencil marks.
Read & practiseWhat makes a daily sudoku challenge comparable
Why a shared puzzle needs clear rules for difficulty, assistance, pauses and repeat attempts to make a leaderboard meaningful.
Read & practise