Make a Sudoku puzzle
Place some givens, test it, and send the link to a friend.
0 givensPlace givens, then Test.
Test results
Tap a cell, then a digit (the same digit again clears it). Keys: arrows move, 1–9 set, Backspace or 0 clears.
What makes a good puzzle
Every Coronet puzzle is fair: it has exactly one solution, and you can reach it by logic alone, without guessing. Test checks both, using the same five techniques our own puzzles are built on. If logic gets stuck, it tells you which rows, columns or boxes it couldn’t finish, so you know where another given would help.
A puzzle needs room to solve: at least a third of the board empty (27 cells on Classic, 12 on Mini). Boards that need a pair rate Medium; a Pointing Pair makes it Hard. The link only holds your givens, never the answer, so your friend can’t peek.