Filters
Filters narrow down which grids are shown on the home page and on the variant pages.
On large screens the filter panel is always visible on the left. On smaller screens tap the Filters button above the grids to open it, then hide it with the ✕ button or by tapping outside the panel.

Favorites
The Favorites section at the top applies or saves your preferred filter: the variant selection, the match mode and the difficulty / length ranges.
- Apply Favorites Filter applies your saved favorite filter. Until a favorite is saved this button is disabled and reads No Saved Favorites.
- Save As Favorites saves the current filter as your favorite. It is enabled when a variant is selected or when the difficulty / length ranges are not at their defaults, and the filter is not already your saved favorite.
When the applied filter is exactly your saved favorite, the button turns green and a Delete Favorites Filter action appears under the variant list next to Clear Filters.
Variants
Most of the panel is the list of variants. Click a variant to cycle it through three states:
- Neutral (default) — the variant does not affect the filter.
- Must Have (green) — only grids that contain the variant are shown.
- Exclude (red, struck through) — grids that contain the variant are hidden.
In the image above Killer, Arrow and Thermo are set to Must Have, and Kropki is excluded.
Below the variant list is the Match Any / Match All toggle. It decides how several Must Have variants are combined:
- Match Any (default) — show grids that contain at least one of them (Killer or Arrow or Thermo).
- Match All — show only grids that contain every one of them (Killer and Arrow and Thermo).
The toggle has no effect while fewer than two variants are set to Must Have. With the default Match Any, the example above shows grids with Killer, Arrow or Thermo and hides every grid with Kropki.
Below the match toggle are the Min Difficulty, Max Difficulty, Min Length and Max Length ranges. Difficulty is the solving difficulty and length is the grid tediousness.
- The upper button group sets the minimum, the lower group sets the maximum.
- The default is the full range: Easy to Expert for difficulty, and Short to Very Long for length.
- Selecting a minimum above the current maximum moves the maximum up as well. Selecting a maximum below the current minimum moves the minimum down.
- Select the same value as both minimum and maximum to show only that difficulty or length.
The difficulty and length ranges are also saved as part of your favorites filter.
Clear Filters (shown whenever a filter is active) resets the variant selection, the match mode, the difficulty and length ranges and the status.
Status
The toggle at the bottom switches between:
- Unsolved (default) — only grids you have not solved yet.
- Solved — only grids you have solved.