These non-mutative methods provide detailed information about a given quadrille:

• search(pattern, strict): Searches for cells that match a specific quadrille pattern, with an optional strict mode for exact matches of cell values.
• magnitude(row): Calculates the number of non-empty cells in the specified row.
• reach(row, col, directions): Returns the seed cell’s reach as a number-field quadrille — 0 at the seed, steps-to-reach elsewhere, empty where out of reach; filled cells are obstacles.
• path(row1, col1, row2, col2, directions): Returns a shortest path between two cells as an array of {row, col} steps — empty on failure, uniformly.
• screenRow(pixelY, y, cellLength): Computes the row index from a vertical pixel position. Rarely used—consider using the mouseRow property instead for simplicity.
• screenCol(pixelX, x, cellLength): Computes the col index from a horizontal pixel position. Rarely used—consider using the mouseCol property instead for simplicity.