Chocona (チョコレート・バー) tests geometric foresight and component decomposition. The goal is to carve the board into delicious chocolate blocks that never stick together along orthogonal edges.

• Zero Clues: Regions with a clue of 0 contain zero chocolate cells. Dot every cell in that region white immediately.
• Corner Rectangles: A 2x2 or 1x3 group of black cells must be completed into a pure rectangle without notches or extra protrusions.
• Diagonals: Because chocolate blocks cannot touch orthogonally, adjacent cells to an edge of a block must remain white.