Reading this maze
Quiet courtyard starts at row 2, column 2. Of the 30 grid positions, 22 are paintable and 8 are walls. The start is already painted; the other 21 tiles remain to be reached.
Start left from row 2, column 2. The wall stops you at row 2, column 1; keep the side corridors available for a return visit. The first slide covers 2 of 22 target tiles; 20 remain.
The verified opening crosses 1 tiles before stopping. A breadth-first search proves a 14-slide finish from this exact starting board; that is a reference target, not a move limit. You may revisit any painted tile.
