Daily StoStoneVerified

Daily StoStone strips the spatial logic puzzle genre down to its absolute, most mathematically pure and elegantly complex core, delivering a digital adaptation of a notoriously difficult Japanese grid puzzle (often compared to Sudoku or Nonograms, but with gravity mechanics). Set against a clean, visually minimalist grid divided into distinct irregular regions (outlined in bold), players are tasked with shading specific cells black to form "stones." Your objective is brutally unforgiving and relies on an interlocking set of severe constraints: you must shade exactly the number of cells indicated by any number inside a region, ensuring all shaded cells in a region touch. However, stones from different regions can never touch each other. The ultimate, mind-bending twist? If gravity were applied and all the blackened stones "fell" to the absolute bottom of the grid, they must perfectly fill exactly the bottom half of the puzzle, with zero gaps. Daily StoStone offers a fresh puzzle every day, providing an uncompromising brain-training exercise in logic and spatial planning.

How to Play

• The primary objective is to shade the correct squares black to satisfy the region rules AND the gravity rule.
• Use your Left Mouse Button to click a square and turn it black (making a stone).
• Use your Right Mouse Button (or an alternate toggle) to place an 'X' in a square you mathematically know MUST be empty.
• Region Rules: All black squares within a single boldly outlined region must connect horizontally or vertically. If a region contains a number (e.g., '3'), exactly 3 squares in that region must be black.
• Separation Rule: A black stone in one region CANNOT touch a black stone in an adjacent region horizontally or vertically.
• The Gravity Rule: Mentally simulate all the black squares falling straight down. They must perfectly stack up to fill exactly half the grid, leaving the top half completely empty.

Tips and Tricks

• Count the Total Stones First (The Golden Rule): The grid is usually an even number of rows (e.g., 10x10). The gravity rule dictates that exactly half the grid must be black. In a 10x10 grid, there must be exactly 50 black squares. Count the required numbers in the regions. This helps you deduce how many squares to shade in the "numberless" regions.
• Fill the Bottom Row: Because the stones must fall and pack perfectly, the absolute bottom row of the grid MUST be completely filled with black squares (either resting there originally, or falling there). This is a crucial starting point.
• X Marks the Spot: Marking squares as definitively empty ("X") is equally as important as shading squares. If a region needs 2 stones, and you found them, you MUST immediately place X's in all remaining squares in that region, and all adjacent squares in neighboring regions.
• Watch for "Trapped" White Space: If a white space is completely surrounded by black stones below it, it means the stones above it cannot fall to the bottom. You must redesign your layout to ensure a clear vertical drop path.
• Never Guess: If you guess, you will ruin the puzzle 10 steps later. Only shade a square if you can logically prove it.