Play Coronet like an app — it opens from your home screen, no app store needed.On iPhone or iPad: tap Share , then Add to Home Screen.
Rectopia solver
Type in a board, clue by clue, and find out whether it has exactly one answer, more than one, or none at all. Handy for a board you’ve drawn on paper, or one you can’t crack. Spoiler warning: it shows the answer.
Your board
Tap a cell, then pick its shape and size. Leave the size empty for a ? clue. On a keyboard: arrows to move, numbers for the size, S W T A for the shape, Backspace to clear.
How it works
It’s the same solver that checks every Rectopia board before it goes out. For each clue it lists every rectangle that could be its patch, then tries combinations until the whole grid is covered. It stops once it finds two answers, because two is enough to know a board isn’t a proper puzzle.
Everything runs in your browser; your board never leaves your device. Want to play instead? Trytoday’s daily or an unlimited board.