The Gothic Collection
A little mystery. A moment of clarity.
Your place in the collection
Preparing your puzzle…
Choose your next chapter
240 puzzles, three ways to play. Your place is saved automatically on this browser.
Chosen from the bundled collection using your local calendar date. A new day brings another selection.
Make yourself comfortable
Progress is stored in this browser. Export a backup before clearing browser data or moving to another device.
Importing a backup replaces the progress and settings on this browser after your confirmation.
A record of quiet accomplishments
Results stay on this browser. Assisted, unassisted, and practice results are recorded separately.
A visitor’s guide
Fill each row, each column, and each outlined region with the digits 1–9, once each. Every puzzle has exactly one solution. The starting clues are fixed.
Nine familiar 3×3 boxes. Find what is missing, compare the possibilities, and let each placement lead to the next.
Nine connected shapes replace the square boxes. Follow the thick outlines: every region still holds nine different digits.
Break every ice block using correct placements in unfrozen cells. The Sudoku rules remain Classic.
Try it for yourself
Select a square, then press a number or use the on-screen number pad. In Number first, choose a digit, then select the squares where you want to place it. Notes adds small pencil marks instead of final numbers.
The Undo and Redo buttons let you revisit your moves. Starting clues cannot be edited. Settings controls duplicate highlighting, solution checking, and automatic removal of conflicting notes.
Hints explain a logical next step and highlight the relevant cells. Apply the hint only when you are ready. Revealing an answer is labeled separately and is not a logical deduction. Using hints or reveals is recorded as assistance.
Duplicate checking compares a digit with its row, column, and actual region. Optional solution checking rejects entries that disagree with the saved answer and marks Classic or Irregular attempts assisted. Ice Breaker always rejects an incorrect final entry.
A Sudoku is complete only when every cell is filled and every row, column, and region is valid. Ice Breaker challenge success means all ice is removed within budget; finishing the remaining Sudoku is optional.
Your puzzle, notes, history, elapsed active time, settings, and results are saved locally after meaningful actions. Pause stops the timer, and switching away from this tab pauses active time automatically.
Daily selections come from the bundled 240-puzzle collection, based on your device’s local date. They do not download new puzzles and can overlap puzzles you have already played.
No account or network service is needed to play. A browser reset or clearing site data removes local saves. Use Settings → Export progress to keep a backup or move to another device.
The study will wait
Your puzzle is saved.Take all the time you need.