Domidoku

Dominoes meet Sudoku on one board. Every puzzle is a 9×9 Sudoku grid, but you don't fill it one digit at a time. You place dominoes, two numbers locked together, and both halves have to land correctly. One tile, two constraints, and usually only one square where it can possibly go. If you like Sudoku, you already know the rules. You've just never solved it like this. HOW IT WORKS • The Sudoku rule you know: 1 to 9 once per row, once per column, once per 3×3 box. • The grid starts partly filled. The rest waits in your tray as dominoes. • Work out where each tile belongs, then drop it in. • Three mistakes and the puzzle is over. Finish without a single one for three stars. FIVE DIFFICULTIES Beginner asks you to place 12 dominoes. Pro asks for 27, with far fewer numbers on the board to start from. Intermediate, Advanced and Expert sit in between. Each tier unlocks as you win at the one…