Every puzzle in this app is a 27–28 clue grid with exactly one solution — verified in advance, so there's always a logical path through, never a guess required. "Medium" steps up from "Easy" by weaving in a handful of non-Singles moves — about 3 per puzzle on average — using Naked and Hidden Pairs, Pointing Pairs/Triples, and the occasional Triple. Nothing in this set goes further than that: no X-Wings, no chains, no guessing — just enough pattern-spotting that Singles alone won't carry you through.
Import a puzzle
Paste 81 numbers, in almost any format: comma- or space-separated, a 9×9 grid, or one long string. Use 0 or . for empty cells — box-drawing separators (| and ---+---) are fine too.
Nice solve! 🎉
Solved in 00:00:00 with 0 mistakes and 0 clues used.
Solved it
Congratulations — solved in 00:00:00. Would you like to play again?
Start a new game?
This ends your current game — progress won't be saved.