Puzzle ID: shown once solved
Click between two dots to draw a line, or drag along the dots to draw several. Right click sets a cross.
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Hides the tool buttons for a tidier screen. The tool you used last stays active. Applies to this device only.
The bar with the clock, zoom and settings stays at the top while you scroll, handy on big boards.
The puzzle counts as solved the moment your last mark is right. Turn it off to look over your solution and press Done yourself.
Adds buttons below the board to save up to 10 positions and go back to any of them, e.g. before a bold guess.
Shows letters above and below the board and numbers at its sides, so you can name a cell, like C4.
Play without a running clock. Your time is still measured and shown when you solve the puzzle.
Removes the Hint button and its H key, so it does not tempt you.
The clock stops while the game is in the background and gets a Pause button. Times measured this way are not ranked.
A dot turns red where the line branches or gets stuck, a number when it has too many lines or crosses. Once the loop is closed, numbers still missing lines turn red too.
Shows errors in blue instead of red, which is easier to see with red-green colour blindness.
Outlines what your last move changed, so you quickly find your place again.
Plays a short celebration on the board when you solve a puzzle.
Dragging draws one connected line from dot to dot, round corners too; moving back shortens it. Off: each edge you drag over is set on its own.
Greys out a number once it has as many lines as it shows, so the open ones stand out.
The collection holds pre-made puzzles that are checked for a unique solution. Generating on this device works offline and never runs out.
