Pattern

Pattern is a minimalist yet deeply engaging logic puzzle that offers a fresh take on the classic nonogram (also known as Picross or Griddlers) concept—but with a crucial twist: instead of revealing a hidden picture, the goal is to reconstruct a binary grid pattern that satisfies numerical clues for every row and column.

Each row and column comes with a list of numbers indicating the lengths of consecutive black squares (runs) in that line, in order. For example, a clue of “3 1” means there is a block of three black squares, followed by at least one white square, then a single black square. Crucially, every row and every column has a complete clue set, and the puzzle is designed so that there is exactly one solution—deducible through logic alone, with no guessing required.

What sets Pattern apart is its pure focus on logical consistency: there's no image to “recognize,” so solvers must rely entirely on inference, elimination, and cross-referencing between rows and columns. This makes it especially appealing to fans of constraint-based puzzles like Sudoku or Battleships.

Fill in the grid with a pattern of black and white squares so that the numbers in each row and column match the lengths of consecutive runs of black squares.

Left-click a square to mark it black; right-click (or hold Ctrl while left-clicking) to mark it white. Click and drag along a row or column to mark multiple squares black or white at once. Middle-click (or hold Shift while left-clicking) to return a square to grey—indicating it's undecided. Dragging in this way can erase an entire rectangular area, not just a single row or column.