Unequal

Use each number from 1 to the board size exactly once in each row and column. The open side of every sign touches the larger number: 4 > 2. The pointed tip touches the smaller number. Vertical signs work the same way.

Shaded numbers are fixed. Select a cell and tap a number. Use Notes to pencil possibilities; turn Notes off to place a number. Erase clears the selected cell; Undo keeps the last 64 edits. Historical completion is separate from your current board.

Look for chains: in a 4×4 board, four linked increasing cells must be 1, 2, 3, 4. Combine signs with missing row and column numbers; not every neighboring pair has a sign.

Keyboard: arrows select; digits place; N toggles Notes; U undoes; Delete clears; Escape deselects. No timer or answer-revealing hint.