1. **rightl0 (L-shaped piece)**     - **Shape:** L-shaped, composed of three connected squares.     - **Position:** Now occupies positions f4-1f, f5-1f, and f5-2f.     - **Size:** Spans vertically (2 height) and horizontally (2 width) in an L-shape.     - **Status:** Color is blue; outer edges are bold.     - **Text Identifiers:** "rightl0" positioned in each sub-square.2. **rightl1 (L-shaped piece)**     - **Shape:** L-shaped, composed of three connected squares.     - **Position:** Occupies positions f1-1f, f2-1f, and f2-2f.     - **Size:** Spans vertically (2 height) and horizontally (2 width) in an L-shape.     - **Status:** Color is green; outer edges are bold.     - **Text Identifiers:** "rightl1" positioned in each sub-square.3. **square0 (One-square piece)**     - **Shape:** Single square.     - **Position:** Occupies position f2-0f.     - **Size:** Single unit.     - **Status:** Color is red; all edges are bold.     - **Text Identifiers:** "square0" positioned slightly higher in the square.4. **square1 (One-square piece)**     - **Shape:** Single square.     - **Position:** Occupies position f3-0f.     - **Size:** Single unit.     - **Status:** Color is yellow; all edges are bold.     - **Text Identifiers:** "square1" positioned slightly higher in the square.5. **Grid Cells (Unoccupied)**     - **Shape:** Rectangular grid composed of individual squares.     - **Position:** Covers positions f0-0f, f0-1f, f0-2f, f0-3f, f1-0f, f1-2f, f1-3f, f2-3f, f3-1f, f3-2f, f3-3f, f4-0f, f4-3f, f5-0f, f5-3f.     - **Size:** Single unit for each grid cell.     - **Status:** Clear (no color).     - **Text Identifiers:** Each position marked with text (e.g., "f0-0f") located at the center of the square and labeled as "clear".