Training focus

Use row and column number clues to fill the correct cells and reveal the hidden picture.

How to Play

• Each number on the edge shows how many consecutive filled cells exist in that row or column.
• Multiple numbers (e.g. '2 3') mean separate groups — a group of 2 and a group of 3, in that order.
• Between every group in the same row or column there must be at least one empty cell.
• Left-click to fill a cell; right-click to mark it × (empty). Fill all correct cells to win.

Rules

• Every cell is either filled or empty — × marks help you record cells you know are empty.
• Each number equals the exact length of one unbroken run of filled cells.
• When a row or column has several numbers, each run must be separated by one or more empty cells.
• Clue numbers appear in the order the runs occur: left-to-right for rows, top-to-bottom for columns.

Tips & Strategy

• Start with rows or columns where the total block length nearly fills the line — those cells are forced.
• Overlap method: if a block could start at position A or B, the cells in between must always be filled.
• Use × marks to record cells you know are empty — they help you rule out impossible positions.
• On larger grids, solve the longest clues first; they constrain the most cells and unlock easier deductions.

FAQ