Reading this maze
Offset gallery starts at row 1, column 1. Of the 30 grid positions, 25 are paintable and 5 are walls. The start is already painted; the other 24 tiles remain to be reached.
Start right from row 1, column 1. The wall stops you at row 1, column 6; keep the side corridors available for a return visit. The first slide covers 6 of 25 target tiles; 19 remain.
The verified opening crosses 5 tiles before stopping. A breadth-first search proves a 13-slide finish from this exact starting board; that is a reference target, not a move limit. You may revisit any painted tile.
